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GNU GENERAL PUBLIC LICENSE
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How to Apply These Terms to Your New Programs
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Also add information on how to contact you by electronic and paper mail.
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The hypothetical commands `show w' and `show c' should show the appropriate
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The GNU General Public License does not permit incorporating your program
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<https://www.gnu.org/licenses/why-not-lgpl.html>.

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# denotesrv
9P server for [denote](https://protesilaos.com/emacs/denote) notes.
## Installation
```sh
mk install
```
## Usage
```sh
denotesrv start # background
denotesrv fgstart # foreground
denotesrv status
denotesrv stop
```
## Environment
| Variable | Default | Description |
|----------|---------|-------------|
| `DENOTE_DIR` | `~/Documents/notes` | Notes directory |
| `NAMESPACE` | `/tmp/ns.$USER.:0` | 9P namespace |
## 9P Filesystem
```
denote/
ctl (write) filter <query>, cd <path>
event (read) Event stream
index (read) Note metadata (respects filter)
new (write) Create note: "'title' tag1,tag2"
n/
<id>/
backlinks (read) Notes linking to this note
ctl (write) 'd' to delete
keywords (rw) Tags
path (rw) Filesystem path
title (rw) Note title
```
## See Also
- [acme-denote](https://github.com/lneely/acme-denote) — Acme frontend

5
go.mod Normal file
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module denotesrv
go 1.23.0
require 9fans.net/go v0.0.5

34
go.sum Normal file
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@ -0,0 +1,34 @@
9fans.net/go v0.0.5 h1:u0H3Et5NowdVm56FDD+aWcDOao9zEo+zolNFsr8qyQk=
9fans.net/go v0.0.5/go.mod h1:Rxvbbc1e+1TyGMjAvLthGTyO97t+6JMQ6ly+Lcs9Uf0=
dmitri.shuralyov.com/gpu/mtl v0.0.0-20201218220906-28db891af037/go.mod h1:H6x//7gZCb22OMCxBHrMx7a5I7Hp++hsVxbQ4BYO7hU=
github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=
github.com/go-gl/glfw/v3.3/glfw v0.0.0-20200222043503-6f7a984d4dc4/go.mod h1:tQ2UAYgL5IevRw8kRxooKSPJfGvJ9fJQFa0TUsXzTg8=
golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
golang.org/x/crypto v0.0.0-20190510104115-cbcb75029529/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
golang.org/x/exp v0.0.0-20190731235908-ec7cb31e5a56/go.mod h1:JhuoJpWY28nO4Vef9tZUw9qufEGTyX1+7lmHxV5q5G4=
golang.org/x/exp v0.0.0-20210405174845-4513512abef3/go.mod h1:I6l2HNBLBZEcrOoCpyKLdY2lHoRZ8lI4x60KMCQDft4=
golang.org/x/image v0.0.0-20190227222117-0694c2d4d067/go.mod h1:kZ7UVZpmo3dzQBMxlp+ypCbDeSB+sBbTgSJuh5dn5js=
golang.org/x/image v0.0.0-20190802002840-cff245a6509b/go.mod h1:FeLwcggjj3mMvU+oOTbSwawSJRM1uh48EjtB4UJZlP0=
golang.org/x/mobile v0.0.0-20190312151609-d3739f865fa6/go.mod h1:z+o9i4GpDbdi3rU15maQ/Ox0txvL9dWGYEHz965HBQE=
golang.org/x/mobile v0.0.0-20201217150744-e6ae53a27f4f/go.mod h1:skQtrUTUwhdJvXM/2KKJzY8pDgNr9I/FOMqDVRPBUS4=
golang.org/x/mobile v0.0.0-20210220033013-bdb1ca9a1e08/go.mod h1:skQtrUTUwhdJvXM/2KKJzY8pDgNr9I/FOMqDVRPBUS4=
golang.org/x/mod v0.1.0/go.mod h1:0QHyrYULN0/3qlju5TqG8bIK38QM8yzMo5ekMj3DlcY=
golang.org/x/mod v0.1.1-0.20191105210325-c90efee705ee/go.mod h1:QqPTAvyqsEbceGzBzNggFXnrqF1CaUcvgkdR5Ot7KZg=
golang.org/x/mod v0.1.1-0.20191209134235-331c550502dd/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
golang.org/x/mod v0.3.1-0.20200828183125-ce943fd02449/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
golang.org/x/net v0.0.0-20190311183353-d8887717615a/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20191001151750-bb3f8db39f24/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20210415045647-66c3f260301c/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
golang.org/x/tools v0.0.0-20190312151545-0bb0c0a6e846/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
golang.org/x/tools v0.0.0-20200117012304-6edc0a871e69/go.mod h1:TB2adYChydJhpapKDTa4BR/hXlZSLoq2Wpct/0txZ28=
golang.org/x/tools v0.0.0-20200207183749-b753a1ba74fa/go.mod h1:TB2adYChydJhpapKDTa4BR/hXlZSLoq2Wpct/0txZ28=
golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=

74
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package disk
import (
"bytes"
"denotesrv/pkg/metadata"
"os/exec"
"path/filepath"
"strings"
)
func FindBacklinks(targetID, denoteDir string, allNotes metadata.Results) metadata.Results {
searchPattern := "denote:" + targetID
duCmd := exec.Command("9", "du", "-a")
duCmd.Dir = denoteDir
awkCmd := exec.Command("9", "awk", "$2 ~ /\\.(md|org|txt)$/ {print $2}")
xargsCmd := exec.Command("9", "xargs", "9", "grep", "-l", searchPattern)
xargsCmd.Dir = denoteDir
duOut, err := duCmd.StdoutPipe()
if err != nil {
return nil
}
awkCmd.Stdin = duOut
awkOut, err := awkCmd.StdoutPipe()
if err != nil {
return nil
}
xargsCmd.Stdin = awkOut
var output bytes.Buffer
xargsCmd.Stdout = &output
if err := duCmd.Start(); err != nil {
return nil
}
if err := awkCmd.Start(); err != nil {
return nil
}
if err := xargsCmd.Start(); err != nil {
return nil
}
duCmd.Wait()
awkCmd.Wait()
xargsCmd.Wait()
result := strings.TrimSpace(output.String())
if result == "" {
return nil
}
var results metadata.Results
lines := strings.Split(result, "\n")
for _, line := range lines {
line = strings.TrimPrefix(line, "./")
m := metadata.ParseFilename(filepath.Join(denoteDir, line))
if m.Identifier == "" {
continue
}
for _, note := range allNotes {
if note.Identifier == m.Identifier {
results = append(results, note)
break
}
}
}
return results
}

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internal/disk/loader.go Normal file
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package disk
import (
"denotesrv/pkg/encoding/frontmatter"
"denotesrv/pkg/metadata"
"denotesrv/pkg/util"
"fmt"
"log"
"os"
"path/filepath"
"regexp"
"strings"
)
// GetFullExtension returns the full extension, including compound extensions.
// For example: "file.md.gpg" returns ".md.gpg", "file.tar.gz" returns ".tar.gz"
func GetFullExtension(path string) string {
ext := filepath.Ext(path)
if ext == "" {
return ""
}
// Check if there's another extension before this one
pathWithoutExt := strings.TrimSuffix(path, ext)
innerExt := filepath.Ext(pathWithoutExt)
if innerExt != "" {
// Compound extension found, return both parts
return innerExt + ext
}
return ext
}
// GetContentExtension returns the content type extension, stripping encryption/compression layers.
// For example: "file.md.gpg" returns ".md", "file.tar.gz" returns ".tar", "file.md" returns ".md"
func GetContentExtension(path string) string {
fullExt := GetFullExtension(path)
// For compound extensions, take the first part
parts := strings.Split(fullExt, ".")
if len(parts) >= 3 { // ["", "md", "gpg"] for ".md.gpg"
return "." + parts[1]
}
return fullExt
}
// SupportsFrontMatter returns true if the file extension supports frontmatter.
// Uses the actual extension, not the content extension, so encrypted files (.md.gpg)
// are correctly treated as binary files.
func SupportsFrontMatter(path string) bool {
ext := strings.ToLower(filepath.Ext(path))
return ext == ".org" || ext == ".md" || ext == ".txt"
}
// extractTitleFromContent extracts the title from file content.
// ext should be the file extension (e.g., ".md", ".org", ".txt").
// Returns empty string if no title found or unsupported extension.
func extractTitleFromContent(content string, ext string) string {
ext = strings.ToLower(ext)
if ext != ".org" && ext != ".md" && ext != ".txt" {
return ""
}
// Try org-mode #+title: first, then fall back to first heading
if ext == ".org" {
if m := regexp.MustCompile(`(?m)^#\+title:\s*(.+)$`).FindStringSubmatch(content); m != nil {
return strings.TrimSpace(m[1])
}
// Fallback to first heading (lines starting with *)
if m := regexp.MustCompile(`(?m)^\*+\s+(.+)$`).FindStringSubmatch(content); m != nil {
return strings.TrimSpace(m[1])
}
}
// Try markdown YAML front matter title: first, then fall back to # header
if ext == ".md" {
if m := regexp.MustCompile(`(?ms)^---\n.*?^title:\s*(.+?)$.*?^---`).FindStringSubmatch(content); m != nil {
return strings.TrimSpace(strings.Trim(m[1], `"`))
}
if m := regexp.MustCompile(`(?m)^#\s+(.+)$`).FindStringSubmatch(content); m != nil {
return strings.TrimSpace(m[1])
}
}
return ""
}
// ExtractMetadata extracts metadata from a file (combines filename and content parsing).
// This is the I/O wrapper around metadata's pure functions.
func ExtractMetadata(path string) (*metadata.Metadata, error) {
// Parse filename (no I/O)
note := metadata.ParseFilename(path)
// Check if we should try to read file content for title
ext := strings.ToLower(filepath.Ext(path))
// Don't read unsupported file types
if ext != ".org" && ext != ".md" && ext != ".txt" {
return note, nil
}
// Read file content
content, err := os.ReadFile(path)
if err != nil {
// If we can't read the file, just use filename metadata
return note, nil
}
// Try to extract title from content
if title := extractTitleFromContent(string(content), ext); title != "" {
note.Title = title
}
return note, nil
}
// ExtractFrontMatter reads a file and parses its front matter.
// Returns the parsed FrontMatter and the detected FileType.
func ExtractFrontMatter(path string) (*metadata.FrontMatter, metadata.FileType, error) {
ext := strings.ToLower(filepath.Ext(path))
content, err := os.ReadFile(path)
if err != nil {
return nil, "", fmt.Errorf("failed to read file: %w", err)
}
return frontmatter.Unmarshal(content, ext)
}
// UpdateFrontMatter updates the front matter in a file.
func UpdateFrontMatter(path string, fm *metadata.FrontMatter, fileType metadata.FileType) error {
// Only update frontmatter for supported file types
if !SupportsFrontMatter(path) {
return nil
}
// Read current content
content, err := os.ReadFile(path)
if err != nil {
return fmt.Errorf("failed to read file: %w", err)
}
// Apply front matter to content
newContent, err := util.Apply(string(content), fm, fileType)
if err != nil {
return fmt.Errorf("failed to apply front matter: %w", err)
}
// Write back to file
return os.WriteFile(path, []byte(newContent), 0644)
}
// LoadAll walks a directory and extracts metadata from all denote files.
func LoadAll(dir string) (metadata.Results, error) {
var notes metadata.Results
err := filepath.Walk(dir, func(path string, info os.FileInfo, err error) error {
if err != nil {
return err
}
if info.IsDir() {
return nil
}
note, err := ExtractMetadata(path)
if err != nil {
return err
}
// Only include files with valid identifiers
if note.Identifier != "" {
// Warn on invalid tags but continue loading
if invalid := metadata.ValidateTags(note.Tags); len(invalid) > 0 {
log.Printf("warning: %s:1 invalid tags %v (must be lowercase alphanumeric)", path, invalid)
}
notes = append(notes, note)
}
return nil
})
if err != nil {
return nil, fmt.Errorf("failed to walk directory: %w", err)
}
return notes, nil
}

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// denotesrv - 9P server for denote notes
package main
import (
fs "denotesrv/internal/p9/server"
"denotesrv/pkg/config"
"flag"
"fmt"
"net"
"os"
"os/exec"
"os/signal"
"path/filepath"
"syscall"
"9fans.net/go/plan9/client"
)
const serviceName = "denote"
func main() {
flag.Parse()
if flag.NArg() < 1 {
fmt.Fprintln(os.Stderr, "usage: denotesrv <start|stop|fgstart|status>")
os.Exit(1)
}
ns := client.Namespace()
if ns == "" {
fmt.Fprintln(os.Stderr, "no namespace")
os.Exit(1)
}
sockPath := filepath.Join(ns, serviceName)
pidPath := filepath.Join(ns, serviceName+".pid")
switch flag.Arg(0) {
case "start":
if isRunning(sockPath) {
fmt.Println("denotesrv already running")
os.Exit(0)
}
daemonize(pidPath)
case "fgstart":
if isRunning(sockPath) {
fmt.Println("denotesrv already running")
os.Exit(0)
}
runServer(sockPath, pidPath)
case "stop":
stopServer(sockPath, pidPath)
case "status":
if isRunning(sockPath) {
fmt.Println("denotesrv running")
} else {
fmt.Println("denotesrv not running")
os.Exit(1)
}
default:
fmt.Fprintln(os.Stderr, "usage: denotesrv <start|stop|fgstart|status>")
os.Exit(1)
}
}
func isRunning(sockPath string) bool {
conn, err := net.Dial("unix", sockPath)
if err == nil {
conn.Close()
return true
}
return false
}
func daemonize(pidPath string) {
exe, _ := os.Executable()
cmd := exec.Command(exe, "fgstart")
cmd.Stdout = nil
cmd.Stderr = nil
cmd.Stdin = nil
cmd.SysProcAttr = &syscall.SysProcAttr{Setsid: true}
if err := cmd.Start(); err != nil {
fmt.Fprintf(os.Stderr, "failed to start: %v\n", err)
os.Exit(1)
}
fmt.Printf("denotesrv started (pid %d)\n", cmd.Process.Pid)
}
func stopServer(sockPath, pidPath string) {
data, err := os.ReadFile(pidPath)
if err != nil {
fmt.Println("denotesrv not running")
return
}
var pid int
fmt.Sscanf(string(data), "%d", &pid)
if pid > 0 {
syscall.Kill(pid, syscall.SIGTERM)
}
os.Remove(pidPath)
os.Remove(sockPath)
fmt.Println("denotesrv stopped")
}
func runServer(sockPath, pidPath string) {
// Remove stale socket
if _, err := os.Stat(sockPath); err == nil {
os.Remove(sockPath)
}
// Write PID file
os.WriteFile(pidPath, []byte(fmt.Sprintf("%d", os.Getpid())), 0644)
// Get denote directory
denoteDir := config.DefaultDenoteDir
if envDir := os.Getenv("DENOTE_DIR"); envDir != "" {
denoteDir = envDir
}
// Start server
srv, err := fs.NewServer(denoteDir, fs.Callbacks{})
if err != nil {
fmt.Fprintf(os.Stderr, "failed to create server: %v\n", err)
os.Exit(1)
}
listener, err := net.Listen("unix", sockPath)
if err != nil {
fmt.Fprintf(os.Stderr, "failed to listen: %v\n", err)
os.Exit(1)
}
go func() {
for {
conn, err := listener.Accept()
if err != nil {
return
}
go srv.Serve(conn)
}
}()
fmt.Printf("denotesrv listening on %s (dir: %s)\n", sockPath, denoteDir)
// Wait for signal
sigChan := make(chan os.Signal, 1)
signal.Notify(sigChan, syscall.SIGINT, syscall.SIGTERM)
<-sigChan
fmt.Println("shutting down")
listener.Close()
os.Remove(sockPath)
os.Remove(pidPath)
}

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INSTALL_PATH=$HOME/bin
all:V: install
build:V:
go build -o $INSTALL_PATH/denotesrv .
install:V: build
clean:V:
rm -f $INSTALL_PATH/denotesrv

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pkg/config/config.go Normal file
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package config
import "os"
// ============================================================
// CONFIGURATION: Default Denote Directory
//
// Change this value to set your default denote directory.
// This is used at program startup. After startup, use the
// Dsilo command to switch between directories dynamically.
// ============================================================
var DefaultDenoteDir = os.Getenv("HOME") + "/doc"
// Examples of alternative configurations:
// var DefaultDenoteDir = "/home/lkn/notes"
// var DefaultDenoteDir = os.Getenv("DENOTE_DIR")

172
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package frontmatter
import (
"denotesrv/pkg/metadata"
"fmt"
"regexp"
"strings"
"time"
)
// Templates for denote frontmatter (org, md, txt)
var templates = map[metadata.FileType]string{
metadata.FileTypeOrg: `#+title: %s
#+date: %s
#+filetags: %s
#+identifier: %s
#+signature: %s
`,
metadata.FileTypeMdYaml: `---
title: %s
date: %s
tags: %s
identifier: %s
signature: %s
---
`,
metadata.FileTypeMdToml: `+++
title = %s
date = %s
tags = %s
identifier = %s
signature = %s
+++
`,
metadata.FileTypeTxt: `title: %s
date: %s
tags: %s
identifier: %s
signature: %s
---------------------------
`,
}
// formatTags formats tags according to file type
func formatTags(tags []string, fileType metadata.FileType) string {
if len(tags) == 0 {
return ""
}
switch fileType {
case metadata.FileTypeOrg:
return ":" + strings.Join(tags, ":") + ":"
case metadata.FileTypeMdYaml, metadata.FileTypeMdToml:
return "[" + strings.Join(tags, ", ") + "]"
default:
return strings.Join(tags, " ")
}
}
// Marshal returns the formatted frontmatter content as bytes
func Marshal(fm *metadata.FrontMatter, fileType metadata.FileType) []byte {
template := templates[fileType]
dateStr := time.Now().Format("2006-01-02 Mon 15:04")
// For org-mode, wrap date in brackets for timestamp
if fileType == metadata.FileTypeOrg {
dateStr = "[" + dateStr + "]"
}
keywordsStr := formatTags(fm.Tags, fileType)
content := fmt.Sprintf(template, fm.Title, dateStr, keywordsStr, fm.Identifier, fm.Signature)
return []byte(content)
}
// Unmarshal extracts front matter from file content.
// ext should be the file extension (e.g., ".md", ".org", ".txt").
// Returns the parsed frontmatter and the detected FileType.
func Unmarshal(content []byte, ext string) (*metadata.FrontMatter, metadata.FileType, error) {
ext = strings.ToLower(ext)
text := string(content)
fm := &metadata.FrontMatter{}
var fileType metadata.FileType
switch ext {
case ".org":
fileType = metadata.FileTypeOrg
if m := regexp.MustCompile(`(?m)^#\+title:[ \t]*(.+)$`).FindStringSubmatch(text); m != nil {
fm.Title = strings.TrimSpace(m[1])
}
if m := regexp.MustCompile(`(?m)^#\+filetags:[ \t]*:(.+):$`).FindStringSubmatch(text); m != nil {
fm.Tags = strings.Split(m[1], ":")
}
if m := regexp.MustCompile(`(?m)^#\+identifier:[ \t]*(.+)$`).FindStringSubmatch(text); m != nil {
fm.Identifier = strings.TrimSpace(m[1])
}
if m := regexp.MustCompile(`(?m)^#\+signature:[ \t]*(.*)$`).FindStringSubmatch(text); m != nil {
fm.Signature = strings.TrimSpace(m[1])
}
case ".md":
// Try YAML first
yamlRe := regexp.MustCompile(`(?ms)^---\n(.*?)\n---`)
if m := yamlRe.FindStringSubmatch(text); m != nil {
fileType = metadata.FileTypeMdYaml
yamlContent := m[1]
if m := regexp.MustCompile(`(?m)^title:[ \t]*["']?(.+?)["']?$`).FindStringSubmatch(yamlContent); m != nil {
fm.Title = strings.TrimSpace(m[1])
}
if m := regexp.MustCompile(`(?m)^tags:[ \t]*\[(.+?)\]$`).FindStringSubmatch(yamlContent); m != nil {
tags := strings.Split(m[1], ",")
for i, t := range tags {
t = strings.TrimSpace(t)
t = strings.Trim(t, `"'`)
tags[i] = t
}
fm.Tags = tags
}
if m := regexp.MustCompile(`(?m)^identifier:[ \t]*["']?(.+?)["']?$`).FindStringSubmatch(yamlContent); m != nil {
fm.Identifier = strings.TrimSpace(m[1])
}
if m := regexp.MustCompile(`(?m)^signature:[ \t]*["']?(.*)["']?$`).FindStringSubmatch(yamlContent); m != nil {
fm.Signature = strings.TrimSpace(m[1])
}
} else {
// Try TOML
tomlRe := regexp.MustCompile(`(?ms)^\+\+\+\n(.*?)\n\+\+\+`)
if m := tomlRe.FindStringSubmatch(text); m != nil {
fileType = metadata.FileTypeMdToml
tomlContent := m[1]
if m := regexp.MustCompile(`(?m)^title[ \t]*=[ \t]*["']?(.+?)["']?$`).FindStringSubmatch(tomlContent); m != nil {
fm.Title = strings.TrimSpace(m[1])
}
if m := regexp.MustCompile(`(?m)^tags[ \t]*=[ \t]*\[(.+?)\]$`).FindStringSubmatch(tomlContent); m != nil {
tags := strings.Split(m[1], ",")
for i, t := range tags {
t = strings.TrimSpace(t)
t = strings.Trim(t, `"'`)
tags[i] = t
}
fm.Tags = tags
}
if m := regexp.MustCompile(`(?m)^identifier[ \t]*=[ \t]*["']?(.+?)["']?$`).FindStringSubmatch(tomlContent); m != nil {
fm.Identifier = strings.TrimSpace(m[1])
}
if m := regexp.MustCompile(`(?m)^signature[ \t]*=[ \t]*["']?(.*)["']?$`).FindStringSubmatch(tomlContent); m != nil {
fm.Signature = strings.TrimSpace(m[1])
}
}
}
case ".txt":
fileType = metadata.FileTypeTxt
if m := regexp.MustCompile(`(?m)^title:[ \t]*(.+)$`).FindStringSubmatch(text); m != nil {
fm.Title = strings.TrimSpace(m[1])
}
if m := regexp.MustCompile(`(?m)^tags:[ \t]*(.+)$`).FindStringSubmatch(text); m != nil {
fm.Tags = strings.Fields(m[1])
}
if m := regexp.MustCompile(`(?m)^identifier:[ \t]*(.+)$`).FindStringSubmatch(text); m != nil {
fm.Identifier = strings.TrimSpace(m[1])
}
if m := regexp.MustCompile(`(?m)^signature:[ \t]*(.*)$`).FindStringSubmatch(text); m != nil {
fm.Signature = strings.TrimSpace(m[1])
}
}
return fm, fileType, nil
}

388
pkg/encoding/frontmatter/frontmatter_test.go Normal file
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package frontmatter
import (
"denotesrv/pkg/metadata"
"slices"
"strings"
"testing"
)
// TestFormatTags validates tag formatting for different file types
// Maps to dt-denote--format-front-matter from original tests
func TestFormatTags(t *testing.T) {
tests := []struct {
name string
tags []string
fileType metadata.FileType
want string
}{
{
name: "org with multiple tags",
tags: []string{"tag1", "tag2"},
fileType: metadata.FileTypeOrg,
want: ":tag1:tag2:",
},
{
name: "org with single tag",
tags: []string{"single"},
fileType: metadata.FileTypeOrg,
want: ":single:",
},
{
name: "org with empty tags",
tags: []string{},
fileType: metadata.FileTypeOrg,
want: "",
},
{
name: "md-yaml with multiple tags",
tags: []string{"tag1", "tag2"},
fileType: metadata.FileTypeMdYaml,
want: "[tag1, tag2]",
},
{
name: "md-yaml with single tag",
tags: []string{"single"},
fileType: metadata.FileTypeMdYaml,
want: "[single]",
},
{
name: "md-yaml with empty tags",
tags: []string{},
fileType: metadata.FileTypeMdYaml,
want: "",
},
{
name: "md-toml with multiple tags",
tags: []string{"tag1", "tag2"},
fileType: metadata.FileTypeMdToml,
want: "[tag1, tag2]",
},
{
name: "md-toml with empty tags",
tags: []string{},
fileType: metadata.FileTypeMdToml,
want: "",
},
{
name: "txt with multiple tags",
tags: []string{"tag1", "tag2"},
fileType: metadata.FileTypeTxt,
want: "tag1 tag2",
},
{
name: "txt with single tag",
tags: []string{"single"},
fileType: metadata.FileTypeTxt,
want: "single",
},
{
name: "txt with empty tags",
tags: []string{},
fileType: metadata.FileTypeTxt,
want: "",
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
got := formatTags(tt.tags, tt.fileType)
if got != tt.want {
t.Errorf("formatTags(%v, %q) = %q, want %q", tt.tags, tt.fileType, got, tt.want)
}
})
}
}
// TestFrontMatterBytes validates front matter formatting for all file types
// Maps to dt-denote--format-front-matter from original tests
func TestFrontMatterBytes(t *testing.T) {
identifier := "20240101T120000"
title := "Test Note"
tags := []string{"tag1", "tag2"}
tests := []struct {
name string
fileType metadata.FileType
wantContains []string
wantNotContains []string
}{
{
name: "org format",
fileType: metadata.FileTypeOrg,
wantContains: []string{
"#+title: Test Note",
"#+filetags: :tag1:tag2:",
"#+identifier: 20240101T120000",
"#+date:",
},
},
{
name: "md-yaml format",
fileType: metadata.FileTypeMdYaml,
wantContains: []string{
"---",
"title: Test Note",
"tags: [tag1, tag2]",
"identifier: 20240101T120000",
"date:",
},
},
{
name: "md-toml format",
fileType: metadata.FileTypeMdToml,
wantContains: []string{
"+++",
"title = Test Note",
"tags = [tag1, tag2]",
"identifier = 20240101T120000",
"date =",
},
},
{
name: "txt format",
fileType: metadata.FileTypeTxt,
wantContains: []string{
"title: Test Note",
"tags: tag1 tag2",
"identifier: 20240101T120000",
"date:",
"---------------------------",
},
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
fm := metadata.NewFrontMatter(title, "", tags, identifier)
got := string(Marshal(fm, tt.fileType))
for _, want := range tt.wantContains {
if !strings.Contains(got, want) {
t.Errorf("FrontMatter.Bytes() missing %q\nGot:\n%s", want, got)
}
}
for _, notWant := range tt.wantNotContains {
if strings.Contains(got, notWant) {
t.Errorf("FrontMatter.Bytes() should not contain %q\nGot:\n%s", notWant, got)
}
}
})
}
}
// TestFrontMatterBytesEmptyTags validates front matter formatting with no tags
func TestFrontMatterBytesEmptyTags(t *testing.T) {
identifier := "20240101T120000"
title := "Test Note"
tags := []string{}
tests := []struct {
name string
fileType metadata.FileType
wantTags string
}{
{
name: "org with empty tags",
fileType: metadata.FileTypeOrg,
wantTags: "#+filetags:",
},
{
name: "md-yaml with empty tags",
fileType: metadata.FileTypeMdYaml,
wantTags: "tags:",
},
{
name: "md-toml with empty tags",
fileType: metadata.FileTypeMdToml,
wantTags: "tags =",
},
{
name: "txt with empty tags",
fileType: metadata.FileTypeTxt,
wantTags: "tags:",
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
fm := metadata.NewFrontMatter(title, "", tags, identifier)
got := string(Marshal(fm, tt.fileType))
if !strings.Contains(got, tt.wantTags) {
t.Errorf("FrontMatter.Bytes() with empty tags should contain %q\nGot:\n%s",
tt.wantTags, got)
}
})
}
}
// TestUnmarshal validates front matter parsing from content
func TestUnmarshal(t *testing.T) {
tests := []struct {
name string
content string
ext string
wantTitle string
wantTags []string
wantIdentifier string
wantFileType metadata.FileType
}{
{
name: "org format",
content: `#+title: Org Note
#+date: [2024-01-01 Mon 12:00]
#+filetags: :work:emacs:
#+identifier: 20240101T120000
* First Heading`,
ext: ".org",
wantTitle: "Org Note",
wantTags: []string{"work", "emacs"},
wantIdentifier: "20240101T120000",
wantFileType: metadata.FileTypeOrg,
},
{
name: "org with single tag",
content: `#+title: Single Tag
#+filetags: :single:
#+identifier: 20240101T120000`,
ext: ".org",
wantTitle: "Single Tag",
wantTags: []string{"single"},
wantIdentifier: "20240101T120000",
wantFileType: metadata.FileTypeOrg,
},
{
name: "org without tags",
content: `#+title: No Tags
#+identifier: 20240101T120000`,
ext: ".org",
wantTitle: "No Tags",
wantTags: nil,
wantIdentifier: "20240101T120000",
wantFileType: metadata.FileTypeOrg,
},
{
name: "markdown yaml",
content: `---
title: Markdown Note
date: 2024-01-01
tags: [work, personal]
identifier: 20240101T120000
---
# Content`,
ext: ".md",
wantTitle: "Markdown Note",
wantTags: []string{"work", "personal"},
wantIdentifier: "20240101T120000",
wantFileType: metadata.FileTypeMdYaml,
},
{
name: "markdown yaml with quoted title",
content: `---
title: "Quoted Title"
tags: [test]
identifier: 20240101T120000
---`,
ext: ".md",
wantTitle: "Quoted Title",
wantTags: []string{"test"},
wantIdentifier: "20240101T120000",
wantFileType: metadata.FileTypeMdYaml,
},
{
name: "markdown toml",
content: `+++
title = TOML Note
date = 2024-01-01
tags = [rust, go]
identifier = 20240101T120000
+++
Content`,
ext: ".md",
wantTitle: "TOML Note",
wantTags: []string{"rust", "go"},
wantIdentifier: "20240101T120000",
wantFileType: metadata.FileTypeMdToml,
},
{
name: "txt format",
content: `title: Plain Text
date: 2024-01-01
tags: simple plain
identifier: 20240101T120000
---------------------------
Content here`,
ext: ".txt",
wantTitle: "Plain Text",
wantTags: []string{"simple", "plain"},
wantIdentifier: "20240101T120000",
wantFileType: metadata.FileTypeTxt,
},
{
name: "txt without tags",
content: `title: No Tags Text
identifier: 20240101T120000
---------------------------`,
ext: ".txt",
wantTitle: "No Tags Text",
wantTags: nil,
wantIdentifier: "20240101T120000",
wantFileType: metadata.FileTypeTxt,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
got, fileType, err := Unmarshal([]byte(tt.content), tt.ext)
if err != nil {
t.Fatalf("Unmarshal() error = %v", err)
}
if got.Title != tt.wantTitle {
t.Errorf("Unmarshal().Title = %q, want %q", got.Title, tt.wantTitle)
}
if !slices.Equal(got.Tags, tt.wantTags) {
t.Errorf("Unmarshal().Tags = %v, want %v", got.Tags, tt.wantTags)
}
if got.Identifier != tt.wantIdentifier {
t.Errorf("Unmarshal().Identifier = %q, want %q", got.Identifier, tt.wantIdentifier)
}
if fileType != tt.wantFileType {
t.Errorf("Unmarshal() fileType = %q, want %q", fileType, tt.wantFileType)
}
})
}
}
// TestUnmarshalMissingFields validates handling of missing fields
func TestUnmarshalMissingFields(t *testing.T) {
content := `---
date: 2024-01-01
---`
got, _, err := Unmarshal([]byte(content), ".md")
if err != nil {
t.Fatalf("Unmarshal() error = %v", err)
}
// Should have empty values, not error
if got.Title != "" {
t.Errorf("Unmarshal().Title = %q, want empty", got.Title)
}
if got.Identifier != "" {
t.Errorf("Unmarshal().Identifier = %q, want empty", got.Identifier)
}
if got.Tags != nil {
t.Errorf("Unmarshal().Tags = %v, want nil", got.Tags)
}
}

88
pkg/encoding/results/results.go Normal file
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package results
import (
"bytes"
"fmt"
"log"
"regexp"
"strings"
"denotesrv/pkg/metadata"
)
// Marshal serializes Results to a pipe-delimited byte format.
// Format: identifier | title | tags (comma-separated)
func Marshal(rs metadata.Results) []byte {
var buf strings.Builder
for _, e := range rs {
title := e.Title
if title == "" {
title = "(untitled)"
}
tags := strings.Join(e.Tags, ",")
fmt.Fprintf(&buf, "%s | %s | %s\n", e.Identifier, title, tags)
}
return []byte(buf.String())
}
// Unmarshal parses pipe-delimited byte data into Results.
// Format: identifier | title | tags (comma-separated)
// Invalid tags produce warnings but parsing continues.
func Unmarshal(data []byte) (metadata.Results, error) {
return unmarshal(data, false)
}
// UnmarshalStrict parses pipe-delimited byte data into Results with strict tag validation.
// Returns an error if any tags are invalid.
func UnmarshalStrict(data []byte) (metadata.Results, error) {
return unmarshal(data, true)
}
func unmarshal(data []byte, strict bool) (metadata.Results, error) {
var results metadata.Results
lines := bytes.Split(bytes.TrimSpace(data), []byte("\n"))
// Allow lowercase Latin letters, other letters (CJK, etc.), and digits, no spaces
tagPattern := regexp.MustCompile(`^([\p{Ll}\p{Lo}\p{Nd}]+,)*[\p{Ll}\p{Lo}\p{Nd}]+$`)
for lineNum, line := range lines {
line = bytes.TrimSpace(line)
if len(line) == 0 {
continue
}
parts := bytes.Split(line, []byte("|"))
if len(parts) != 3 {
return nil, fmt.Errorf("line %d: expected 3 columns, got %d (line: %q)", lineNum+1, len(parts), line)
}
identifier := string(bytes.TrimSpace(parts[0]))
title := string(bytes.TrimSpace(parts[1]))
tagsStr := string(bytes.TrimSpace(parts[2]))
if identifier == "" {
return nil, fmt.Errorf("line %d: identifier cannot be empty", lineNum+1)
}
var tags []string
if tagsStr != "" {
if !tagPattern.MatchString(tagsStr) {
if strict {
return nil, fmt.Errorf("line %d: tags must be comma-delimited lowercase unicode words (no spaces): got '%s'", lineNum+1, tagsStr)
}
log.Printf("warning: line %d: invalid tags '%s' (must be lowercase alphanumeric)", lineNum+1, tagsStr)
}
tags = strings.Split(tagsStr, ",")
} else {
tags = []string{}
}
results = append(results, &metadata.Metadata{
Identifier: identifier,
Title: title,
Tags: tags,
})
}
return results, nil
}

186
pkg/encoding/results/results_test.go Normal file
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package results
import (
"denotesrv/pkg/metadata"
"slices"
"testing"
)
// TestMarshal validates serialization
func TestMarshal(t *testing.T) {
tests := []struct {
name string
input metadata.Results
want string
}{
{
name: "single note with tags",
input: metadata.Results{
{
Identifier: "20240101T120000",
Title: "Test Note",
Tags: []string{"tag1", "tag2"},
},
},
want: "20240101T120000 | Test Note | tag1,tag2\n",
},
{
name: "note without tags",
input: metadata.Results{
{
Identifier: "20240101T120000",
Title: "Simple Note",
Tags: []string{},
},
},
want: "20240101T120000 | Simple Note | \n",
},
{
name: "note without title",
input: metadata.Results{
{
Identifier: "20240101T120000",
Title: "",
Tags: []string{"tag"},
},
},
want: "20240101T120000 | (untitled) | tag\n",
},
{
name: "multiple notes",
input: metadata.Results{
{Identifier: "20240101T120000", Title: "First", Tags: []string{"a"}},
{Identifier: "20240102T120000", Title: "Second", Tags: []string{"b", "c"}},
},
want: "20240101T120000 | First | a\n20240102T120000 | Second | b,c\n",
},
{
name: "empty results",
input: metadata.Results{},
want: "",
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
got := string(Marshal(tt.input))
if got != tt.want {
t.Errorf("Marshal() = %q, want %q", got, tt.want)
}
})
}
}
// TestUnmarshal validates parsing from byte format
func TestUnmarshal(t *testing.T) {
tests := []struct {
name string
input []byte
want metadata.Results
wantErr bool
}{
{
name: "single note with tags",
input: []byte("20240101T120000 | Test Note | tag1,tag2"),
want: metadata.Results{
{Identifier: "20240101T120000", Title: "Test Note", Tags: []string{"tag1", "tag2"}},
},
wantErr: false,
},
{
name: "note without tags",
input: []byte("20240101T120000 | Simple Note | "),
want: metadata.Results{
{Identifier: "20240101T120000", Title: "Simple Note", Tags: []string{}},
},
wantErr: false,
},
{
name: "multiple notes",
input: []byte("20240101T120000 | First | a\n20240102T120000 | Second | b,c"),
want: metadata.Results{
{Identifier: "20240101T120000", Title: "First", Tags: []string{"a"}},
{Identifier: "20240102T120000", Title: "Second", Tags: []string{"b", "c"}},
},
wantErr: false,
},
{
name: "empty input",
input: []byte(""),
want: nil,
wantErr: false,
},
{
name: "wrong column count",
input: []byte("20240101T120000 | Title"),
want: nil,
wantErr: true,
},
{
name: "empty identifier",
input: []byte(" | Title | tags"),
want: nil,
wantErr: true,
},
{
name: "invalid tags with spaces",
input: []byte("20240101T120000 | Title | tag with spaces"),
want: nil,
wantErr: true,
},
{
name: "invalid tags with uppercase",
input: []byte("20240101T120000 | Title | Tag1,tag2"),
want: nil,
wantErr: true,
},
{
name: "valid lowercase unicode tags",
input: []byte("20240101T120000 | Title | tag1,测试,αβγ"),
want: metadata.Results{
{Identifier: "20240101T120000", Title: "Title", Tags: []string{"tag1", "测试", "αβγ"}},
},
wantErr: false,
},
{
name: "blank lines ignored",
input: []byte("20240101T120000 | First | a\n\n20240102T120000 | Second | b"),
want: metadata.Results{
{Identifier: "20240101T120000", Title: "First", Tags: []string{"a"}},
{Identifier: "20240102T120000", Title: "Second", Tags: []string{"b"}},
},
wantErr: false,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
got, err := Unmarshal(tt.input)
if (err != nil) != tt.wantErr {
t.Errorf("Unmarshal() error = %v, wantErr %v", err, tt.wantErr)
return
}
if tt.wantErr {
return
}
if len(got) != len(tt.want) {
t.Fatalf("Unmarshal() length = %d, want %d", len(got), len(tt.want))
}
for i := range got {
if got[i].Identifier != tt.want[i].Identifier {
t.Errorf("Result[%d].Identifier = %q, want %q", i, got[i].Identifier, tt.want[i].Identifier)
}
if got[i].Title != tt.want[i].Title {
t.Errorf("Result[%d].Title = %q, want %q", i, got[i].Title, tt.want[i].Title)
}
if !slices.Equal(got[i].Tags, tt.want[i].Tags) {
t.Errorf("Result[%d].Tags = %v, want %v", i, got[i].Tags, tt.want[i].Tags)
}
}
})
}
}

112
pkg/metadata/filter.go Normal file
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package metadata
import (
"fmt"
"regexp"
"slices"
"strings"
)
// Filter matches a given field in a Result to a regular expression
type Filter struct {
field FilterField
re *regexp.Regexp
negate bool
}
type Filters []*Filter
type FilterField string
const (
FilterDate FilterField = "date"
FilterTitle FilterField = "title"
FilterTag FilterField = "tag"
FilterAny FilterField = ""
)
// Parse converts a slice of strings of the form "tag:<tagname>",
// "date:<date>", "title:'<title>'" into a Filters list
func (fs Filters) Parse(S []string) (Filters, error) {
for _, fa := range S {
f, err := NewFilter(fa)
if err != nil {
return nil, fmt.Errorf("failed to list notes: %w", err)
}
fs = append(fs, f)
}
return fs, nil
}
// NewFilter constructs a Filter from a filter string. arg takes the form
// field:criteria, e.g., tag:/dev|meeting/, date:20251101.
func NewFilter(arg string) (*Filter, error) {
negate := strings.HasPrefix(arg, "!")
if negate {
arg = strings.TrimPrefix(arg, "!")
}
m := regexp.MustCompile(`^(?:(date|title|tag):)?(.+)$`).FindStringSubmatch(arg)
if m == nil {
return nil, fmt.Errorf("invalid filter syntax: %s", arg)
}
fieldStr := m[1]
value := m[2]
// Strip surrounding quotes (both single and double)
value = strings.Trim(value, `"'`)
// Validate: if field is title and value has spaces, original should have been quoted
if fieldStr == "title" && strings.Contains(value, " ") {
// Check if original value was quoted
if !strings.HasPrefix(m[2], `"`) && !strings.HasPrefix(m[2], `'`) {
return nil, fmt.Errorf("title with spaces must be quoted: %s", arg)
}
}
pattern := value
if strings.HasPrefix(pattern, "/") && strings.HasSuffix(pattern, "/") {
pattern = strings.TrimPrefix(strings.TrimSuffix(pattern, "/"), "/")
} else {
pattern = regexp.QuoteMeta(pattern)
}
re, err := regexp.Compile("(?i)" + pattern)
if err != nil {
return nil, fmt.Errorf("invalid regex: %v", err)
}
return &Filter{field: FilterField(fieldStr), re: re, negate: negate}, nil
}
// IsMatch checks if a note matches this filter
func (f *Filter) IsMatch(n *Metadata) bool {
result := false
switch f.field {
case FilterDate:
result = f.re.MatchString(n.Identifier)
case FilterTitle:
result = f.re.MatchString(n.Title)
case FilterTag:
result = slices.ContainsFunc(n.Tags, func(kw string) bool {
return f.re.MatchString(kw)
})
case FilterAny: // any field
if f.re.MatchString(n.Identifier) {
result = true
} else if f.re.MatchString(n.Title) {
result = true
} else {
result = slices.ContainsFunc(n.Tags, func(kw string) bool {
return f.re.MatchString(kw)
})
}
default:
return false
}
if f.negate {
return !result
}
return result
}

43
pkg/metadata/frontmatter.go Normal file
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package metadata
// FileType represents supported file formats for denote notes
type FileType string
const (
FileTypeOrg FileType = "org"
FileTypeMdYaml FileType = "md-yaml"
FileTypeMdToml FileType = "md-toml"
FileTypeTxt FileType = "txt"
)
// fileExtensions contains the list of file extensions
// for which Denote should add front matter.
var fileExtensions = map[FileType]string{
FileTypeOrg: ".org",
FileTypeMdYaml: ".md",
FileTypeMdToml: ".md",
FileTypeTxt: ".txt",
}
// GetExtension returns the file extension for a given file type.
func GetExtension(fileType FileType) string {
return fileExtensions[fileType]
}
// FrontMatter represents parsed front matter from a note
type FrontMatter struct {
Title string
Tags []string
Identifier string
Signature string
}
// NewFrontMatter creates a new FrontMatter struct from given parameters
func NewFrontMatter(title, signature string, tags []string, identifier string) *FrontMatter {
return &FrontMatter{
Title: title,
Tags: tags,
Identifier: identifier,
Signature: signature,
}
}

169
pkg/metadata/metadata.go Normal file
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package metadata
import (
"fmt"
"path/filepath"
"regexp"
"sort"
"strings"
"time"
"unicode"
)
// Metadata is the metadata encoded into Denote-style
// file names.
type Metadata struct {
Path string
Identifier string
Signature string
Title string
Tags []string
}
type Results []*Metadata
type SortBy string
const (
SortById SortBy = "id"
SortByDate SortBy = "date"
SortByTitle SortBy = "title"
)
type SortOrder int
const (
SortOrderAsc SortOrder = iota
SortOrderDesc
)
// Sort organizes a list of notes by sortType and order using metadata.
func Sort(md Results, sortType SortBy, order SortOrder) {
switch sortType {
case SortById, SortByDate:
sort.Slice(md, func(i, j int) bool {
if order == SortOrderAsc {
return md[i].Identifier < md[j].Identifier // Reverse chronological by default
} else {
return md[i].Identifier > md[j].Identifier // Reverse chronological by default
}
})
case SortByTitle:
sort.Slice(md, func(i, j int) bool {
if order == SortOrderAsc {
return strings.ToLower(md[i].Title) < strings.ToLower(md[j].Title)
} else {
return strings.ToLower(md[i].Title) > strings.ToLower(md[j].Title)
}
})
default:
sort.Slice(md, func(i, j int) bool {
return md[i].Identifier > md[j].Identifier // Reverse chronological by default
})
}
}
// ParseFilename extracts Denote metadata from a filename only (no file I/O).
// Returns metadata with Path, Identifier, Signature, Title (from filename), and Tags.
func ParseFilename(path string) *Metadata {
fname := filepath.Base(path)
note := &Metadata{Path: path}
if m := regexp.MustCompile(`^(\d{8}T\d{6})`).FindStringSubmatch(fname); m != nil {
note.Identifier = m[1]
}
// Extract signature (optional component between identifier and title)
if m := regexp.MustCompile(`==([^-]+?)--`).FindStringSubmatch(fname); m != nil {
note.Signature = m[1]
}
// Extract title from filename
if m := regexp.MustCompile(`--([^_\.]+)`).FindStringSubmatch(fname); m != nil {
note.Title = strings.ReplaceAll(m[1], "-", " ")
}
if m := regexp.MustCompile(`__(.+?)(?:\.|$)`).FindStringSubmatch(fname); m != nil {
note.Tags = strings.Split(m[1], "_")
}
return note
}
// IsValidTag returns true if the tag contains only lowercase letters, other unicode letters, or digits.
func IsValidTag(tag string) bool {
for _, r := range tag {
if !unicode.IsLetter(r) && !unicode.IsDigit(r) {
return false
}
if unicode.IsLetter(r) && unicode.IsUpper(r) {
return false
}
}
return len(tag) > 0
}
// ValidateTags checks all tags and returns invalid ones.
func ValidateTags(tags []string) []string {
var invalid []string
for _, tag := range tags {
if !IsValidTag(tag) {
invalid = append(invalid, tag)
}
}
return invalid
}
// GenerateIdentifier creates a new identifier timestamp.
func GenerateIdentifier() string {
return time.Now().Format("20060102T150405")
}
// slugifyTitle converts a title to a filesystem-safe slug.
func slugifyTitle(title string) string {
slug := strings.ToLower(title)
slug = strings.ReplaceAll(slug, " ", "-")
slug = strings.ReplaceAll(slug, "_", "-")
return regexp.MustCompile(`[^a-z0-9-]`).ReplaceAllString(slug, "")
}
// slugifySignature converts a signature to Denote-compliant format.
// Following Denote rules: lowercase, spaces/underscores -> double equals,
// remove special chars, normalize consecutive equals to double equals.
func slugifySignature(sig string) string {
slug := strings.ToLower(sig)
slug = strings.ReplaceAll(slug, " ", "==")
slug = strings.ReplaceAll(slug, "_", "==")
// Remove special characters per Denote spec
slug = regexp.MustCompile(`[{}!@#$%^&*()+'"?,.\\|;:~\x60''""/-]`).ReplaceAllString(slug, "")
// Normalize consecutive equals signs (3 or more) to double equals
slug = regexp.MustCompile(`={3,}`).ReplaceAllString(slug, "==")
// Trim trailing equals
slug = strings.Trim(slug, "=")
return slug
}
// formatKeywords formats keywords for a denote filename.
func formatKeywords(keywords []string) string {
if len(keywords) == 0 {
return ""
}
return "__" + strings.Join(keywords, "_")
}
// formatSignature formats a signature for a denote filename.
// Returns empty string if signature is empty, otherwise returns ==signature.
func formatSignature(sig string) string {
if sig == "" {
return ""
}
return "==" + slugifySignature(sig)
}
// BuildFilename constructs a denote filename from metadata components.
func BuildFilename(fm *FrontMatter, ext string) string {
titleSlug := slugifyTitle(fm.Title)
signaturePart := formatSignature(fm.Signature)
keywordsPart := formatKeywords(fm.Tags)
return fmt.Sprintf("%s%s--%s%s%s", fm.Identifier, signaturePart, titleSlug, keywordsPart, ext)
}

506
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package metadata
import (
"regexp"
"slices"
"testing"
"time"
)
// TestGenerateIdentifier validates timestamp format (YYYYMMDDThhmmss)
// Maps to dt-denote-identifier-p from original tests
func TestGenerateIdentifier(t *testing.T) {
id := GenerateIdentifier()
// Validate format
pattern := regexp.MustCompile(`^\d{8}T\d{6}$`)
if !pattern.MatchString(id) {
t.Errorf("GenerateIdentifier() = %q, want format YYYYMMDDThhmmss", id)
}
// Validate it's a valid timestamp
_, err := time.Parse("20060102T150405", id)
if err != nil {
t.Errorf("GenerateIdentifier() = %q, not a valid timestamp: %v", id, err)
}
}
// TestSlugifyTitle validates title slugification
// Maps to dt-denote-sluggify-title and dt-denote-sluggify from original tests
func TestSlugifyTitle(t *testing.T) {
tests := []struct {
name string
input string
want string
}{
{
name: "basic spaces to hyphens",
input: "Hello World",
want: "hello-world",
},
{
name: "underscores to hyphens",
input: "Test_File Name",
want: "test-file-name",
},
{
name: "remove punctuation",
input: "Test File!",
want: "test-file",
},
{
name: "mixed case",
input: "Mixed CASE 123",
want: "mixed-case-123",
},
{
name: "special characters",
input: "Special@#$Chars",
want: "specialchars",
},
{
name: "multiple spaces",
input: "Multiple Spaces",
want: "multiple---spaces",
},
{
name: "leading and trailing spaces",
input: " Trim Me ",
want: "--trim-me--",
},
{
name: "empty string",
input: "",
want: "",
},
{
name: "numbers only",
input: "12345",
want: "12345",
},
{
name: "hyphens preserved",
input: "already-hyphenated",
want: "already-hyphenated",
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
got := slugifyTitle(tt.input)
if got != tt.want {
t.Errorf("slugifyTitle(%q) = %q, want %q", tt.input, got, tt.want)
}
})
}
}
// TestFormatKeywords validates keyword formatting for filenames
// Maps to dt-denote-sluggify-keywords from original tests
func TestFormatKeywords(t *testing.T) {
tests := []struct {
name string
input []string
want string
}{
{
name: "multiple keywords",
input: []string{"tag1", "tag2"},
want: "__tag1_tag2",
},
{
name: "single keyword",
input: []string{"single"},
want: "__single",
},
{
name: "empty keywords",
input: []string{},
want: "",
},
{
name: "nil keywords",
input: nil,
want: "",
},
{
name: "three keywords",
input: []string{"one", "two", "three"},
want: "__one_two_three",
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
got := formatKeywords(tt.input)
if got != tt.want {
t.Errorf("formatKeywords(%v) = %q, want %q", tt.input, got, tt.want)
}
})
}
}
// TestSlugifySignature validates signature slugification
func TestSlugifySignature(t *testing.T) {
tests := []struct {
name string
input string
want string
}{
{
name: "basic spaces to equals",
input: "Hello World",
want: "hello==world",
},
{
name: "underscores to equals",
input: "test_file",
want: "test==file",
},
{
name: "remove special characters",
input: "a!@#b",
want: "ab",
},
{
name: "normalize consecutive equals",
input: "a===b",
want: "a==b",
},
{
name: "mixed",
input: "Hello World_Test",
want: "hello==world==test",
},
{
name: "trim trailing equals",
input: "test_",
want: "test",
},
{
name: "empty string",
input: "",
want: "",
},
{
name: "lowercase already",
input: "already",
want: "already",
},
{
name: "numbers preserved",
input: "test123",
want: "test123",
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
got := slugifySignature(tt.input)
if got != tt.want {
t.Errorf("slugifySignature(%q) = %q, want %q", tt.input, got, tt.want)
}
})
}
}
// TestBuildFilename validates filename construction
// Maps to dt-denote-format-file-name from original tests
func TestBuildFilename(t *testing.T) {
tests := []struct {
name string
identifier string
signature string
title string
keywords []string
ext string
want string
ftype FileType
}{
{
name: "complete filename with keywords",
identifier: "20231225T120000",
signature: "",
title: "My Title",
keywords: []string{"tag1", "tag2"},
ext: ".md",
want: "20231225T120000--my-title__tag1_tag2.md",
ftype: FileTypeMdYaml,
},
{
name: "filename without keywords",
identifier: "20231225T120000",
signature: "",
title: "My Title",
keywords: []string{},
ext: ".md",
want: "20231225T120000--my-title.md",
ftype: FileTypeMdYaml,
},
{
name: "filename with signature",
identifier: "20231225T120000",
signature: "hello",
title: "My Title",
keywords: []string{"tag1"},
ext: ".md",
want: "20231225T120000==hello--my-title__tag1.md",
ftype: FileTypeMdYaml,
},
{
name: "filename with signature and no keywords",
identifier: "20231225T120000",
signature: "test",
title: "My Title",
keywords: []string{},
ext: ".md",
want: "20231225T120000==test--my-title.md",
ftype: FileTypeMdYaml,
},
{
name: "filename with multi-part signature",
identifier: "20231225T120000",
signature: "a==b",
title: "My Title",
keywords: []string{"work"},
ext: ".md",
want: "20231225T120000==a==b--my-title__work.md",
ftype: FileTypeMdYaml,
},
{
name: "filename with special chars in title",
identifier: "20231225T120000",
signature: "",
title: "Special!@# Title",
keywords: []string{"work"},
ext: ".org",
want: "20231225T120000--special-title__work.org",
ftype: FileTypeOrg,
},
{
name: "org format",
identifier: "20240101T000000",
signature: "",
title: "Org Note",
keywords: []string{"emacs"},
ext: ".org",
want: "20240101T000000--org-note__emacs.org",
ftype: FileTypeOrg,
},
{
name: "txt format",
identifier: "20240101T000000",
signature: "",
title: "Plain Text",
keywords: []string{},
ext: ".txt",
want: "20240101T000000--plain-text.txt",
ftype: FileTypeTxt,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
fm := NewFrontMatter(tt.title, tt.signature, tt.keywords, tt.identifier)
got := BuildFilename(fm, tt.ext)
if got != tt.want {
t.Errorf("BuildFilename() = %q, want %q", got, tt.want)
}
})
}
}
// TestParseFilename validates filename parsing
// Maps to dt-denote-retrieve-filename-* tests from original
func TestParseFilename(t *testing.T) {
tests := []struct {
name string
path string
wantIdentifier string
wantSignature string
wantTitle string
wantTags []string
}{
{
name: "complete filename with tags",
path: "/home/notes/20231225T120000--my-title__tag1_tag2.md",
wantIdentifier: "20231225T120000",
wantSignature: "",
wantTitle: "my title",
wantTags: []string{"tag1", "tag2"},
},
{
name: "filename without tags",
path: "/home/notes/20231225T120000--simple-title.md",
wantIdentifier: "20231225T120000",
wantSignature: "",
wantTitle: "simple title",
wantTags: nil,
},
{
name: "filename with signature",
path: "20240101T000000==hello--note__work.org",
wantIdentifier: "20240101T000000",
wantSignature: "hello",
wantTitle: "note",
wantTags: []string{"work"},
},
{
name: "filename with signature and no tags",
path: "20240101T000000==test--title.md",
wantIdentifier: "20240101T000000",
wantSignature: "test",
wantTitle: "title",
wantTags: nil,
},
{
name: "filename with multi-part signature",
path: "20240101T000000==a==b--note__tag.md",
wantIdentifier: "20240101T000000",
wantSignature: "a==b",
wantTitle: "note",
wantTags: []string{"tag"},
},
{
name: "filename with single tag",
path: "20240101T000000--note__work.org",
wantIdentifier: "20240101T000000",
wantSignature: "",
wantTitle: "note",
wantTags: []string{"work"},
},
{
name: "identifier only",
path: "20240101T000000.txt",
wantIdentifier: "20240101T000000",
wantSignature: "",
wantTitle: "",
wantTags: nil,
},
{
name: "multi-word title",
path: "20240101T000000--multi-word-title__personal_ideas.md",
wantIdentifier: "20240101T000000",
wantSignature: "",
wantTitle: "multi word title",
wantTags: []string{"personal", "ideas"},
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
got := ParseFilename(tt.path)
if got.Identifier != tt.wantIdentifier {
t.Errorf("ParseFilename(%q).Identifier = %q, want %q",
tt.path, got.Identifier, tt.wantIdentifier)
}
if got.Signature != tt.wantSignature {
t.Errorf("ParseFilename(%q).Signature = %q, want %q",
tt.path, got.Signature, tt.wantSignature)
}
if got.Title != tt.wantTitle {
t.Errorf("ParseFilename(%q).Title = %q, want %q",
tt.path, got.Title, tt.wantTitle)
}
if !slices.Equal(got.Tags, tt.wantTags) {
t.Errorf("ParseFilename(%q).Tags = %v, want %v",
tt.path, got.Tags, tt.wantTags)
}
if got.Path != tt.path {
t.Errorf("ParseFilename(%q).Path = %q, want %q",
tt.path, got.Path, tt.path)
}
})
}
}
// TestSort validates sorting functionality
func TestSort(t *testing.T) {
notes := Results{
{Identifier: "20240103T120000", Title: "Charlie"},
{Identifier: "20240101T120000", Title: "Alice"},
{Identifier: "20240102T120000", Title: "Bob"},
}
t.Run("sort by id ascending", func(t *testing.T) {
testData := make(Results, len(notes))
copy(testData, notes)
Sort(testData, SortById, SortOrderAsc)
if testData[0].Identifier != "20240101T120000" {
t.Errorf("First item identifier = %q, want %q", testData[0].Identifier, "20240101T120000")
}
if testData[2].Identifier != "20240103T120000" {
t.Errorf("Last item identifier = %q, want %q", testData[2].Identifier, "20240103T120000")
}
})
t.Run("sort by id descending", func(t *testing.T) {
testData := make(Results, len(notes))
copy(testData, notes)
Sort(testData, SortById, SortOrderDesc)
if testData[0].Identifier != "20240103T120000" {
t.Errorf("First item identifier = %q, want %q", testData[0].Identifier, "20240103T120000")
}
if testData[2].Identifier != "20240101T120000" {
t.Errorf("Last item identifier = %q, want %q", testData[2].Identifier, "20240101T120000")
}
})
t.Run("sort by title ascending", func(t *testing.T) {
testData := make(Results, len(notes))
copy(testData, notes)
Sort(testData, SortByTitle, SortOrderAsc)
if testData[0].Title != "Alice" {
t.Errorf("First item title = %q, want %q", testData[0].Title, "Alice")
}
if testData[2].Title != "Charlie" {
t.Errorf("Last item title = %q, want %q", testData[2].Title, "Charlie")
}
})
t.Run("sort by title descending", func(t *testing.T) {
testData := make(Results, len(notes))
copy(testData, notes)
Sort(testData, SortByTitle, SortOrderDesc)
if testData[0].Title != "Charlie" {
t.Errorf("First item title = %q, want %q", testData[0].Title, "Charlie")
}
if testData[2].Title != "Alice" {
t.Errorf("Last item title = %q, want %q", testData[2].Title, "Alice")
}
})
t.Run("sort by title case insensitive", func(t *testing.T) {
testData := Results{
{Identifier: "1", Title: "zebra"},
{Identifier: "2", Title: "Apple"},
{Identifier: "3", Title: "banana"},
}
Sort(testData, SortByTitle, SortOrderAsc)
// Should be: Apple, banana, zebra (case-insensitive)
if testData[0].Title != "Apple" {
t.Errorf("First item title = %q, want %q", testData[0].Title, "Apple")
}
if testData[1].Title != "banana" {
t.Errorf("Second item title = %q, want %q", testData[1].Title, "banana")
}
if testData[2].Title != "zebra" {
t.Errorf("Third item title = %q, want %q", testData[2].Title, "zebra")
}
})
}

70
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package util
import (
"denotesrv/pkg/encoding/frontmatter"
"denotesrv/pkg/metadata"
"fmt"
"regexp"
"strings"
)
// Apply applies front matter to file content, replacing existing front matter if present.
// originalContent is the current file content, fm is the new front matter to apply.
func Apply(originalContent string, fm *metadata.FrontMatter, fileType metadata.FileType) (string, error) {
text := originalContent
newFrontMatter := string(frontmatter.Marshal(fm, fileType))
var newText string
switch fileType {
case metadata.FileTypeOrg:
// Find end of front matter (first blank line or non-#+ line)
lines := strings.Split(text, "\n")
endIdx := 0
for i, line := range lines {
if i > 0 && (line == "" || !strings.HasPrefix(line, "#+")) {
endIdx = i
break
}
}
// Skip any blank lines after frontmatter since template includes one
for endIdx < len(lines) && lines[endIdx] == "" {
endIdx++
}
if endIdx > 0 {
newText = newFrontMatter + strings.Join(lines[endIdx:], "\n")
} else {
newText = newFrontMatter + text
}
case metadata.FileTypeMdYaml:
// Replace YAML front matter (match trailing blank lines to avoid duplication)
re := regexp.MustCompile(`(?s)^---\n.*?\n---\n\n*`)
if re.MatchString(text) {
newText = re.ReplaceAllString(text, newFrontMatter)
} else {
newText = newFrontMatter + text
}
case metadata.FileTypeMdToml:
// Replace TOML front matter (match trailing blank lines to avoid duplication)
re := regexp.MustCompile(`(?s)^\+\+\+\n.*?\n\+\+\+\n\n*`)
if re.MatchString(text) {
newText = re.ReplaceAllString(text, newFrontMatter)
} else {
newText = newFrontMatter + text
}
case metadata.FileTypeTxt:
// Replace text front matter (match trailing blank lines to avoid duplication)
re := regexp.MustCompile(`(?s)^title:.*?\n-+\n\n*`)
if re.MatchString(text) {
newText = re.ReplaceAllString(text, newFrontMatter)
} else {
newText = newFrontMatter + text
}
default:
return "", fmt.Errorf("unsupported file type: %s", fileType)
}
return newText, nil
}

215
pkg/util/util_test.go Normal file
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package util
import (
"denotesrv/pkg/metadata"
"strings"
"testing"
)
func TestApply(t *testing.T) {
tests := []struct {
name string
original string
fm *metadata.FrontMatter
fileType metadata.FileType
wantContains []string
wantPreserve string
}{
{
name: "update org front matter",
original: `#+title: Old Title
#+date: [2024-01-01 Mon 12:00]
#+filetags: :old:
#+identifier: 20240101T120000
* Original Content
This should be preserved`,
fm: &metadata.FrontMatter{
Title: "New Title",
Tags: []string{"new", "updated"},
Identifier: "20240101T120000",
},
fileType: metadata.FileTypeOrg,
wantContains: []string{
"#+title: New Title",
"#+filetags: :new:updated:",
"* Original Content",
"This should be preserved",
},
wantPreserve: "* Original Content",
},
{
name: "update markdown yaml front matter",
original: `---
title: Old Title
tags: [old]
identifier: 20240101T120000
---
# Original Heading
Content preserved`,
fm: &metadata.FrontMatter{
Title: "New Title",
Tags: []string{"new"},
Identifier: "20240101T120000",
},
fileType: metadata.FileTypeMdYaml,
wantContains: []string{
"---",
"title: New Title",
"tags: [new]",
"# Original Heading",
"Content preserved",
},
wantPreserve: "# Original Heading",
},
{
name: "update markdown toml front matter",
original: `+++
title = Old Title
tags = [old]
identifier = 20240101T120000
+++
Content here`,
fm: &metadata.FrontMatter{
Title: "New Title",
Tags: []string{"updated"},
Identifier: "20240101T120000",
},
fileType: metadata.FileTypeMdToml,
wantContains: []string{
"+++",
"title = New Title",
"tags = [updated]",
"Content here",
},
wantPreserve: "Content here",
},
{
name: "update txt front matter",
original: `title: Old Title
tags: old
identifier: 20240101T120000
---------------------------
Text content`,
fm: &metadata.FrontMatter{
Title: "New Title",
Tags: []string{"new"},
Identifier: "20240101T120000",
},
fileType: metadata.FileTypeTxt,
wantContains: []string{
"title: New Title",
"tags: new",
"---------------------------",
"Text content",
},
wantPreserve: "Text content",
},
{
name: "add front matter when missing (org)",
original: `* Original Heading`,
fm: &metadata.FrontMatter{
Title: "Added Title",
Tags: []string{"added"},
Identifier: "20240101T120000",
},
fileType: metadata.FileTypeOrg,
wantContains: []string{
"#+title: Added Title",
"#+filetags: :added:",
"* Original Heading",
},
wantPreserve: "* Original Heading",
},
{
name: "add front matter when missing (md-yaml)",
original: `# Original Heading`,
fm: &metadata.FrontMatter{
Title: "Added Title",
Tags: []string{"added"},
Identifier: "20240101T120000",
},
fileType: metadata.FileTypeMdYaml,
wantContains: []string{
"---",
"title: Added Title",
"tags: [added]",
"# Original Heading",
},
wantPreserve: "# Original Heading",
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
got, err := Apply(tt.original, tt.fm, tt.fileType)
if err != nil {
t.Fatalf("Apply() error = %v", err)
}
for _, want := range tt.wantContains {
if !strings.Contains(got, want) {
t.Errorf("Apply() missing %q\nGot:\n%s", want, got)
}
}
// Verify original content is preserved
if !strings.Contains(got, tt.wantPreserve) {
t.Errorf("Apply() didn't preserve %q\nGot:\n%s", tt.wantPreserve, got)
}
})
}
}
// TestApplyEmptyTags validates updating with empty tags
func TestApplyEmptyTags(t *testing.T) {
original := `---
title: Test
tags: [old, tags]
identifier: 20240101T120000
---
Content`
fm := &metadata.FrontMatter{
Title: "Test",
Tags: []string{},
Identifier: "20240101T120000",
}
got, err := Apply(original, fm, metadata.FileTypeMdYaml)
if err != nil {
t.Fatalf("Apply() error = %v", err)
}
// Should have empty tags field, not omit it
if !strings.Contains(got, "tags:") {
t.Errorf("Apply() should include tags field even when empty")
}
// Content should be preserved
if !strings.Contains(got, "Content") {
t.Errorf("Apply() should preserve content")
}
}
// TestApplyUnsupportedType validates error handling
func TestApplyUnsupportedType(t *testing.T) {
fm := &metadata.FrontMatter{
Title: "Test",
Tags: []string{"test"},
Identifier: "20240101T120000",
}
_, err := Apply("content", fm, "unsupported")
if err == nil {
t.Error("Apply() should error on unsupported file type")
}
if !strings.Contains(err.Error(), "unsupported file type") {
t.Errorf("Apply() error = %v, want 'unsupported file type'", err)
}
}