commit d3d56ae358e991959b552017203047bb40a224f3
Author: breadcat <breadcat@users.noreply.github.com>
Date: Thu, 2 Apr 2026 15:08:45 +0100
Initial commit
Diffstat:
4 files changed, 262 insertions(+), 0 deletions(-)
diff --git a/.gitattributes b/.gitattributes
@@ -0,0 +1,2 @@
+# Auto detect text files and perform LF normalization
+* text=auto
diff --git a/gnocchi b/gnocchi
Binary files differ.
diff --git a/go.mod b/go.mod
@@ -0,0 +1,3 @@
+module gnocchi
+
+go 1.21
+\ No newline at end of file
diff --git a/main.go b/main.go
@@ -0,0 +1,256 @@
+package main
+
+import (
+ "bufio"
+ "flag"
+ "fmt"
+ "log"
+ "net/http"
+ "os"
+ "os/exec"
+ "regexp"
+ "strings"
+ "time"
+)
+
+var filePath string
+
+func main() {
+ port := flag.String("p", "8080", "port to listen on")
+ file := flag.String("f", "", "path to markdown file (required)")
+ flag.Parse()
+
+ if *file == "" {
+ fmt.Fprintln(os.Stderr, "Usage: weight-tracker -f <file.md> [-p <port>]")
+ flag.PrintDefaults()
+ os.Exit(1)
+ }
+ filePath = *file
+
+ if _, err := os.Stat(filePath); err != nil {
+ fmt.Fprintf(os.Stderr, "Cannot open %s: %v\n", filePath, err)
+ os.Exit(1)
+ }
+
+ http.HandleFunc("/", handleIndex)
+ http.HandleFunc("/submit", handleSubmit)
+
+ addr := ":" + *port
+ fmt.Printf("Listening on %s\n", addr)
+ log.Fatal(http.ListenAndServe(addr, nil))
+}
+
+func readFile() (string, error) {
+ b, err := os.ReadFile(filePath)
+ if err != nil {
+ return "", err
+ }
+ return string(b), nil
+}
+
+func extractSVG(content string) string {
+ re := regexp.MustCompile(`(?s)<svg[\s\S]*?</svg>`)
+ return re.FindString(content)
+}
+
+func extractEntries(content string) []string {
+ re := regexp.MustCompile(`(?s)<pre>([\s\S]*?)</pre>`)
+ m := re.FindStringSubmatch(content)
+ if m == nil {
+ return nil
+ }
+ var entries []string
+ scanner := bufio.NewScanner(strings.NewReader(strings.TrimSpace(m[1])))
+ for scanner.Scan() {
+ line := strings.TrimSpace(scanner.Text())
+ if line != "" {
+ entries = append(entries, line)
+ }
+ }
+ return entries
+}
+
+func todayStr() string {
+ return time.Now().Format("2006-01-02")
+}
+
+func entryExistsForToday(entries []string) bool {
+ today := todayStr()
+ for _, e := range entries {
+ if strings.HasPrefix(e, today) {
+ return true
+ }
+ }
+ return false
+}
+
+func updatePreBlock(content, weight string) string {
+ today := todayStr()
+ newLine := today + "," + weight
+
+ re := regexp.MustCompile(`(?s)(<pre>)([\s\S]*?)(</pre>)`)
+ return re.ReplaceAllStringFunc(content, func(block string) string {
+ parts := re.FindStringSubmatch(block)
+ if parts == nil {
+ return block
+ }
+ raw := parts[2]
+ lines := strings.Split(raw, "\n")
+ replaced := false
+ for i, line := range lines {
+ if strings.HasPrefix(strings.TrimSpace(line), today) {
+ lines[i] = newLine
+ replaced = true
+ break
+ }
+ }
+ if !replaced {
+ trimmed := strings.TrimRight(raw, "\n ")
+ raw = trimmed + "\n" + newLine + "\n"
+ } else {
+ raw = strings.Join(lines, "\n")
+ }
+ return parts[1] + raw + parts[3]
+ })
+}
+
+func handleSubmit(w http.ResponseWriter, r *http.Request) {
+ if r.Method != http.MethodPost {
+ http.Redirect(w, r, "/", http.StatusSeeOther)
+ return
+ }
+ weight := strings.TrimSpace(r.FormValue("weight"))
+ if weight == "" {
+ http.Redirect(w, r, "/", http.StatusSeeOther)
+ return
+ }
+ if !strings.Contains(weight, ".") {
+ weight += ".0"
+ }
+
+ content, err := readFile()
+ if err != nil {
+ http.Error(w, "Could not read file: "+err.Error(), http.StatusInternalServerError)
+ return
+ }
+
+ updated := updatePreBlock(content, weight)
+
+ if err := os.WriteFile(filePath, []byte(updated), 0644); err != nil {
+ http.Error(w, "Could not write file: "+err.Error(), http.StatusInternalServerError)
+ return
+ }
+
+ // Run blog-weight to regenerate graph / markdown.
+ cmd := exec.Command("blog-weight")
+ cmd.Stdout = os.Stdout
+ cmd.Stderr = os.Stderr
+ if err := cmd.Run(); err != nil {
+ log.Printf("blog-weight exited with error: %v", err)
+ }
+
+ http.Redirect(w, r, "/", http.StatusSeeOther)
+}
+
+func handleIndex(w http.ResponseWriter, r *http.Request) {
+ content, err := readFile()
+ if err != nil {
+ http.Error(w, "Could not read file: "+err.Error(), http.StatusInternalServerError)
+ return
+ }
+
+ svg := extractSVG(content)
+ entries := extractEntries(content)
+ today := todayStr()
+ alreadyLogged := entryExistsForToday(entries)
+
+ lastEntry := ""
+ if len(entries) > 0 {
+ lastEntry = entries[len(entries)-1]
+ }
+
+ start := len(entries) - 14
+ if start < 0 {
+ start = 0
+ }
+ recent := entries[start:]
+
+ w.Header().Set("Content-Type", "text/html; charset=utf-8")
+
+ autofocusAttr := "autofocus"
+
+ alreadyLoggedHTML := ""
+ if alreadyLogged {
+ alreadyLoggedHTML = `<p class="logged">Already logged today: ` + lastEntry + `</p>`
+ }
+
+ recentRows := ""
+ for _, e := range recent {
+ parts := strings.SplitN(e, ",", 2)
+ date, val := parts[0], ""
+ if len(parts) == 2 {
+ val = parts[1]
+ }
+ recentRows += fmt.Sprintf("<tr><td>%s</td><td>%s kg</td></tr>\n", date, val)
+ }
+
+ recentTable := ""
+ if len(recent) > 0 {
+ recentTable = `<div class="card"><h2>Recent entries</h2><table>` + recentRows + `</table></div>`
+ }
+
+ svgBlock := ""
+ if svg != "" {
+ svgBlock = `<div class="card"><h2>Chart</h2>` + svg + `</div>`
+ }
+
+ html := `<!doctype html>
+<html lang="en">
+<head>
+<meta charset="UTF-8">
+<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1">
+<title>Weight Logger</title>
+<style>
+ *{box-sizing:border-box;margin:0;padding:0}
+ .card h2,body,button,button:hover{color:#d4d4d4}
+ .card h2,button{font-size:1rem;color:#d4d4d4}
+ .card h2{margin-bottom:12px}
+ .card,body{padding:16px}
+ .card{background:#222;border-radius:12px;margin-bottom:16px;border:1px solid #333;box-shadow:none}
+ .date-label{font-size:.85rem;color:#777;margin-bottom:8px}
+ .input-row{display:flex;gap:8px;align-items:center}
+ .logged{font-size:.9rem;color:#7cbf7c;font-weight:600;margin-top:8px}
+ body{font-family:Consolas,Menlo,'DejaVu Sans Mono',monospace;background:#1a1a1a;max-width:600px;margin:0 auto}
+ button:active{opacity:.8}
+ button:hover{background:#2e2e2e}
+ button{padding:10px 20px;background:#2a2a2a;border:1px solid #333;border-radius:8px;cursor:pointer;white-space:nowrap}
+ input[type=number]::-webkit-inner-spin-button,input[type=number]::-webkit-outer-spin-button{-webkit-appearance:none}
+ input[type=number]{flex:1;font-size:1.4rem;padding:10px 14px;border:2px solid #333;border-radius:8px;background:#1a1a1a;color:#d4d4d4;-moz-appearance:textfield}
+ svg,table{width:100%}
+ svg{height:auto;display:block}
+ svg text {fill: #d4d4d4}
+ table{border-collapse:collapse;font-size:.9rem}
+ td:last-child{text-align:right;font-variant-numeric:tabular-nums}
+ td{padding:6px 4px;border-bottom:1px solid #333}
+ tr:last-child td{border-bottom:none;font-weight:600}
+</style>
+</head>
+<body>
+<div class="card">
+ <h2>Log today's weight</h2>
+ <p class="date-label">` + today + `</p>
+ <form method="POST" action="/submit">
+ <div class="input-row">
+ <input type="number" name="weight" step="0.1" min="30" max="300"
+ placeholder="kg" inputmode="decimal" ` + autofocusAttr + `>
+ <button type="submit">Save</button>
+ </div>
+ </form>
+ ` + alreadyLoggedHTML + `
+</div>
+` + recentTable + `
+` + svgBlock + `
+</body></html>`
+
+ fmt.Fprint(w, html)
+}
