added dockerfile

Dockerfile

@@ -0,0 +1,19 @@
+FROM debian:bookworm-slim
+
+# (optional) install ca-certificates if needed
+RUN apt-get update && apt-get install -y ca-certificates && rm -rf /var/lib/apt/lists/*
+
+WORKDIR /app
+
+COPY --from=builder /app/fitness-app /app/fitness-app
+
+# External data dir for sqlite db
+RUN mkdir -p /data
+
+ENV DATABASE_URL=/data/fitness.db
+
+# DO NOT switch user -> run as root
+EXPOSE 8080
+VOLUME ["/data"]
+
+CMD ["/app/fitness-app"]

docker-compose.yml

@@ -0,0 +1,17 @@
+version: "3.9"
+
+services:
+  fitness:
+    build: .
+    container_name: fitness-tracker
+    restart: unless-stopped
+    environment:
+      # DB file inside container
+      - DATABASE_URL=/data/fitness.db
+    volumes:
+      # Host folder -> container /data
+      # On host, your db will be: ./fitness-data/fitness.db
+      - ./fitness-data:/data
+    ports:
+      # For quick testing; in production you'd put Traefik in front instead
+      - "8080:8080"

main.go

@@ -6,6 +6,7 @@ import (
 	"html/template"
 	"log"
 	"net/http"
+	"os"
 	"strconv"
 	"time"
 
@@ -13,12 +14,12 @@ import (
 )
 
 var (
-	db           *sql.DB
+	db        *sql.DB
-	indexTmpl    *template.Template
+	indexTmpl *template.Template
-	listenAddr   = ":8080"
+	listenAddr = ":8080"
-	databaseFile = "fitness.db"
 )
 
+// A single set row for display
 type SetRow struct {
 	ID        int
 	Exercise  string
@@ -27,11 +28,41 @@ type SetRow struct {
 	StartedAt time.Time
 }
 
+// Workout summary for history view
+type WorkoutSummary struct {
+	ID            int
+	StartedAt     time.Time
+	EndedAt       *time.Time
+	Duration      time.Duration
+	SetCount      int
+	Volume        float64
+	TotalRest     time.Duration
+	HasEnded      bool
+	DurationHuman string
+	RestHuman     string
+	Template      string
+}
+
+// Internal workout structure
+type Workout struct {
+	ID        int
+	StartedAt time.Time
+	EndedAt   *time.Time
+	Template  string
+}
+
 func main() {
 	var err error
 
+	// --- DB path from env: DATABASE_URL (fallback: fitness.db) ---
+	dbPath := os.Getenv("DATABASE_URL")
+	if dbPath == "" {
+		dbPath = "fitness.db"
+	}
+	log.Printf("Using database file: %s", dbPath)
+
 	// Open SQLite DB
-	db, err = sql.Open("sqlite3", databaseFile)
+	db, err = sql.Open("sqlite3", dbPath)
 	if err != nil {
 		log.Fatal("open db:", err)
 	}
@@ -44,16 +75,19 @@ func main() {
 	// Parse template with helper funcs
 	indexTmpl = template.Must(template.New("index").Funcs(template.FuncMap{
 		"add": func(a, b int) int { return a + b },
+		"eq":  func(a, b interface{}) bool { return a == b },
 	}).Parse(indexHTML))
 
 	// Routes
 	http.HandleFunc("/", handleIndex)
 	http.HandleFunc("/start", handleStartWorkout)
+	http.HandleFunc("/finish", handleFinishWorkout)
 	http.HandleFunc("/add-set", handleAddSet)
 
 	// APIs
 	http.HandleFunc("/api/rest-times", handleRestTimes)
 	http.HandleFunc("/api/volume", handleVolumeStats)
+	http.HandleFunc("/api/last-set", handleLastSet)
 
 	log.Printf("Listening on %s ...", listenAddr)
 	if err := http.ListenAndServe(listenAddr, nil); err != nil {
@@ -62,7 +96,7 @@ func main() {
 }
 
 func initDB() error {
-	// Very simple schema
+	// Migration-friendly: create basic tables, then ALTER for new columns.
 	schema := `
 CREATE TABLE IF NOT EXISTS workouts (
 	id INTEGER PRIMARY KEY AUTOINCREMENT,
@@ -79,36 +113,106 @@ CREATE TABLE IF NOT EXISTS sets (
 	FOREIGN KEY(workout_id) REFERENCES workouts(id)
 );
 `
-	_, err := db.Exec(schema)
+	if _, err := db.Exec(schema); err != nil {
-	return err
+		return err
+	}
+
+	// Add new columns if they don't exist (ignore errors if already there).
+	_, _ = db.Exec(`ALTER TABLE workouts ADD COLUMN ended_at TEXT`)
+	_, _ = db.Exec(`ALTER TABLE workouts ADD COLUMN template TEXT`)
+
+	return nil
 }
 
 // --- Handlers ---
 
 func handleIndex(w http.ResponseWriter, r *http.Request) {
-	latestID, err := getLatestWorkoutID()
+	// Current / latest workout
+	latest, err := getLatestWorkout()
 	if err != nil {
 		http.Error(w, "db error", http.StatusInternalServerError)
 		return
 	}
 
 	var sets []SetRow
-	if latestID != 0 {
+	if latest != nil {
-		sets, err = getSetsForWorkout(latestID)
+		sets, err = getSetsForWorkout(latest.ID)
 		if err != nil {
 			http.Error(w, "db error", http.StatusInternalServerError)
 			return
 		}
 	}
 
+	// Date filters for history
+	fromStr := r.URL.Query().Get("from")
+	toStr := r.URL.Query().Get("to")
+
+	var from, to *time.Time
+	if fromStr != "" {
+		t, err := time.Parse("2006-01-02", fromStr)
+		if err == nil {
+			t0 := time.Date(t.Year(), t.Month(), t.Day(), 0, 0, 0, 0, time.Local)
+			from = &t0
+		}
+	}
+	if toStr != "" {
+		t, err := time.Parse("2006-01-02", toStr)
+		if err == nil {
+			t1 := time.Date(t.Year(), t.Month(), t.Day(), 0, 0, 0, 0, time.Local).AddDate(0, 0, 1)
+			to = &t1
+		}
+	}
+
+	workouts, err := getWorkoutSummaries(from, to)
+	if err != nil {
+		http.Error(w, "db error", http.StatusInternalServerError)
+		return
+	}
+
 	data := struct {
-		HasWorkout bool
+		HasWorkout     bool
-		WorkoutID  int
+		WorkoutID      int
-		Sets       []SetRow
+		WorkoutActive  bool
+		WorkoutStart   *time.Time
+		WorkoutEnd     *time.Time
+		WorkoutTemplate string
+		Sets           []SetRow
+
+		From string
+		To   string
+
+		Workouts []WorkoutSummary
 	}{
-		HasWorkout: latestID != 0,
+		HasWorkout: latest != nil,
-		WorkoutID:  latestID,
+		WorkoutID: func() int {
-		Sets:       sets,
+			if latest != nil {
+				return latest.ID
+			}
+			return 0
+		}(),
+		WorkoutActive: latest != nil && latest.EndedAt == nil,
+		WorkoutStart: func() *time.Time {
+			if latest != nil {
+				return &latest.StartedAt
+			}
+			return nil
+		}(),
+		WorkoutEnd: func() *time.Time {
+			if latest != nil {
+				return latest.EndedAt
+			}
+			return nil
+		}(),
+		WorkoutTemplate: func() string {
+			if latest != nil {
+				return latest.Template
+			}
+			return ""
+		}(),
+		Sets:     sets,
+		From:     fromStr,
+		To:       toStr,
+		Workouts: workouts,
 	}
 
 	if err := indexTmpl.Execute(w, data); err != nil {
@@ -122,8 +226,9 @@ func handleStartWorkout(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 	now := time.Now().UTC().Format(time.RFC3339)
+	templateVal := r.FormValue("template") // "" / "A" / "B"
 
-	_, err := db.Exec(`INSERT INTO workouts (started_at) VALUES (?)`, now)
+	_, err := db.Exec(`INSERT INTO workouts (started_at, template) VALUES (?, ?)`, now, templateVal)
 	if err != nil {
 		http.Error(w, "db error", http.StatusInternalServerError)
 		return
@@ -132,6 +237,28 @@ func handleStartWorkout(w http.ResponseWriter, r *http.Request) {
 	http.Redirect(w, r, "/", http.StatusSeeOther)
 }
 
+func handleFinishWorkout(w http.ResponseWriter, r *http.Request) {
+	if r.Method != http.MethodPost {
+		http.Redirect(w, r, "/", http.StatusSeeOther)
+		return
+	}
+	// Find latest workout that is not finished
+	row := db.QueryRow(`SELECT id FROM workouts WHERE ended_at IS NULL ORDER BY id DESC LIMIT 1`)
+	var id int
+	if err := row.Scan(&id); err != nil {
+		// no active workout; just return
+		http.Redirect(w, r, "/", http.StatusSeeOther)
+		return
+	}
+	now := time.Now().UTC().Format(time.RFC3339)
+	_, err := db.Exec(`UPDATE workouts SET ended_at = ? WHERE id = ?`, now, id)
+	if err != nil {
+		http.Error(w, "db error", http.StatusInternalServerError)
+		return
+	}
+	http.Redirect(w, r, "/", http.StatusSeeOther)
+}
+
 func handleAddSet(w http.ResponseWriter, r *http.Request) {
 	if r.Method != http.MethodPost {
 		http.Redirect(w, r, "/", http.StatusSeeOther)
@@ -139,13 +266,13 @@ func handleAddSet(w http.ResponseWriter, r *http.Request) {
 	}
 
 	// Always attach to latest workout
-	workoutID, err := getLatestWorkoutID()
+	latest, err := getLatestWorkout()
-	if err != nil || workoutID == 0 {
+	if err != nil || latest == nil {
 		http.Error(w, "no active workout", http.StatusBadRequest)
 		return
 	}
 
-	// NEW: exercise from dropdown + optional custom
+	// exercise from dropdown + optional custom
 	selected := r.FormValue("exercise_select")
 	exerciseCustom := r.FormValue("exercise_custom")
 
@@ -179,7 +306,7 @@ func handleAddSet(w http.ResponseWriter, r *http.Request) {
 	_, err = db.Exec(
 		`INSERT INTO sets (workout_id, exercise, reps, weight, started_at)
 		 VALUES (?, ?, ?, ?, ?)`,
-		workoutID, exercise, reps, weight, now,
+		latest.ID, exercise, reps, weight, now,
 	)
 	if err != nil {
 		http.Error(w, "db error", http.StatusInternalServerError)
@@ -192,15 +319,15 @@ func handleAddSet(w http.ResponseWriter, r *http.Request) {
 // --- API: rest times between sets (latest workout) ---
 
 func handleRestTimes(w http.ResponseWriter, r *http.Request) {
-	workoutID, err := getLatestWorkoutID()
+	latest, err := getLatestWorkout()
-	if err != nil || workoutID == 0 {
+	if err != nil || latest == nil {
 		http.Error(w, "no workout", http.StatusBadRequest)
 		return
 	}
 
 	rows, err := db.Query(
 		`SELECT id, started_at FROM sets WHERE workout_id = ? ORDER BY started_at`,
-		workoutID,
+		latest.ID,
 	)
 	if err != nil {
 		http.Error(w, "db error", http.StatusInternalServerError)
@@ -276,7 +403,7 @@ func handleVolumeStats(w http.ResponseWriter, r *http.Request) {
 			weekday = 7 // Sunday
 		}
 		curStart = time.Date(now.Year(), now.Month(), now.Day(), 0, 0, 0, 0, now.Location()).
-			AddDate(0, 0, -(weekday - 1))
+			AddDate(0, 0, -(weekday-1))
 		curEnd = curStart.AddDate(0, 0, 7)
 	case "month":
 		curStart = time.Date(now.Year(), now.Month(), 1, 0, 0, 0, 0, now.Location())
@@ -331,6 +458,45 @@ func handleVolumeStats(w http.ResponseWriter, r *http.Request) {
 	_ = json.NewEncoder(w).Encode(resp)
 }
 
+// --- API: last set for exercise (for autofill) ---
+
+func handleLastSet(w http.ResponseWriter, r *http.Request) {
+	ex := r.URL.Query().Get("exercise")
+	if ex == "" {
+		http.Error(w, "missing exercise", http.StatusBadRequest)
+		return
+	}
+
+	row := db.QueryRow(`SELECT reps, weight FROM sets WHERE exercise = ? ORDER BY started_at DESC LIMIT 1`, ex)
+	var reps int
+	var weight float64
+	err := row.Scan(&reps, &weight)
+	if err == sql.ErrNoRows {
+		resp := struct {
+			Found bool `json:"found"`
+		}{Found: false}
+		w.Header().Set("Content-Type", "application/json")
+		_ = json.NewEncoder(w).Encode(resp)
+		return
+	}
+	if err != nil {
+		http.Error(w, "db error", http.StatusInternalServerError)
+		return
+	}
+
+	resp := struct {
+		Found  bool    `json:"found"`
+		Reps   int     `json:"reps"`
+		Weight float64 `json:"weight"`
+	}{
+		Found:  true,
+		Reps:   reps,
+		Weight: weight,
+	}
+	w.Header().Set("Content-Type", "application/json")
+	_ = json.NewEncoder(w).Encode(resp)
+}
+
 func queryVolume(start, end time.Time) (float64, error) {
 	// Sum of (reps * weight) for sets whose started_at is in [start, end)
 	startStr := start.UTC().Format(time.RFC3339)
@@ -349,16 +515,38 @@ func queryVolume(start, end time.Time) (float64, error) {
 	return vol, nil
 }
 
-// --- Helpers ---
+// --- Helpers & summaries ---
 
-func getLatestWorkoutID() (int, error) {
+func getLatestWorkout() (*Workout, error) {
-	row := db.QueryRow(`SELECT id FROM workouts ORDER BY id DESC LIMIT 1`)
+	row := db.QueryRow(`SELECT id, started_at, ended_at, template FROM workouts ORDER BY id DESC LIMIT 1`)
 	var id int
-	err := row.Scan(&id)
+	var startedStr string
+	var endedStr sql.NullString
+	var templateStr sql.NullString
+
+	err := row.Scan(&id, &startedStr, &endedStr, &templateStr)
 	if err == sql.ErrNoRows {
-		return 0, nil
+		return nil, nil
 	}
-	return id, err
+	if err != nil {
+		return nil, err
+	}
+	started, err := time.Parse(time.RFC3339, startedStr)
+	if err != nil {
+		return nil, err
+	}
+	var ended *time.Time
+	if endedStr.Valid && endedStr.String != "" {
+		t, err := time.Parse(time.RFC3339, endedStr.String)
+		if err == nil {
+			ended = &t
+		}
+	}
+	tmpl := ""
+	if templateStr.Valid {
+		tmpl = templateStr.String
+	}
+	return &Workout{ID: id, StartedAt: started, EndedAt: ended, Template: tmpl}, nil
 }
 
 func getSetsForWorkout(workoutID int) ([]SetRow, error) {
@@ -391,6 +579,147 @@ func getSetsForWorkout(workoutID int) ([]SetRow, error) {
 	return out, rows.Err()
 }
 
+// Get workout summaries for history, optional date filter
+func getWorkoutSummaries(from, to *time.Time) ([]WorkoutSummary, error) {
+	query := `SELECT id, started_at, ended_at, template FROM workouts`
+	var args []interface{}
+	if from != nil || to != nil {
+		query += " WHERE"
+		first := true
+		if from != nil {
+			query += " started_at >= ?"
+			args = append(args, from.UTC().Format(time.RFC3339))
+			first = false
+		}
+		if to != nil {
+			if !first {
+				query += " AND"
+			}
+			query += " started_at < ?"
+			args = append(args, to.UTC().Format(time.RFC3339))
+		}
+	}
+	query += " ORDER BY started_at DESC LIMIT 50"
+
+	rows, err := db.Query(query, args...)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	var res []WorkoutSummary
+
+	for rows.Next() {
+		var id int
+		var startedStr string
+		var endedStr sql.NullString
+		var templateStr sql.NullString
+
+		if err := rows.Scan(&id, &startedStr, &endedStr, &templateStr); err != nil {
+			return nil, err
+		}
+		started, err := time.Parse(time.RFC3339, startedStr)
+		if err != nil {
+			return nil, err
+		}
+		var ended *time.Time
+		hasEnded := false
+		if endedStr.Valid && endedStr.String != "" {
+			t, err := time.Parse(time.RFC3339, endedStr.String)
+			if err == nil {
+				ended = &t
+				hasEnded = true
+			}
+		}
+		tmpl := ""
+		if templateStr.Valid {
+			tmpl = templateStr.String
+		}
+
+		// Stats: sets, volume, total rest
+		rows2, err := db.Query(`SELECT reps, weight, started_at FROM sets WHERE workout_id = ? ORDER BY started_at`, id)
+		if err != nil {
+			return nil, err
+		}
+		type setData struct {
+			Reps      int
+			Weight    float64
+			StartedAt time.Time
+		}
+		var sd []setData
+		for rows2.Next() {
+			var r int
+			var w float64
+			var stStr string
+			if err := rows2.Scan(&r, &w, &stStr); err != nil {
+				rows2.Close()
+				return nil, err
+			}
+			t, err := time.Parse(time.RFC3339, stStr)
+			if err != nil {
+				rows2.Close()
+				return nil, err
+			}
+			sd = append(sd, setData{Reps: r, Weight: w, StartedAt: t})
+		}
+		rows2.Close()
+
+		setCount := len(sd)
+		var volume float64
+		var rest time.Duration
+		for i, s := range sd {
+			volume += float64(s.Reps) * s.Weight
+			if i > 0 {
+				d := s.StartedAt.Sub(sd[i-1].StartedAt)
+				if d > 0 {
+					rest += d
+				}
+			}
+		}
+
+		var duration time.Duration
+		if ended != nil {
+			duration = ended.Sub(started)
+		} else {
+			duration = 0
+		}
+
+		res = append(res, WorkoutSummary{
+			ID:            id,
+			StartedAt:     started,
+			EndedAt:       ended,
+			Duration:      duration,
+			SetCount:      setCount,
+			Volume:        volume,
+			TotalRest:     rest,
+			HasEnded:      hasEnded,
+			DurationHuman: formatDuration(duration),
+			RestHuman:     formatDuration(rest),
+			Template:      tmpl,
+		})
+	}
+	return res, rows.Err()
+}
+
+// simple duration formatter: 1h 23m, 5m 10s, etc.
+func formatDuration(d time.Duration) string {
+	if d <= 0 {
+		return "-"
+	}
+	sec := int(d.Seconds())
+	h := sec / 3600
+	sec = sec % 3600
+	m := sec / 60
+	s := sec % 60
+	if h > 0 {
+		return strconv.Itoa(h) + "h " + strconv.Itoa(m) + "m"
+	}
+	if m > 0 {
+		return strconv.Itoa(m) + "m " + strconv.Itoa(s) + "s"
+	}
+	return strconv.Itoa(s) + "s"
+}
+
 // --- HTML template (single page) ---
 
 const indexHTML = `
@@ -403,7 +732,7 @@ const indexHTML = `
 	<style>
 		body {
 			font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
-			max-width: 900px;
+			max-width: 1100px;
 			margin: 0 auto;
 			padding: 1rem;
 			background: #111827;
@@ -419,6 +748,7 @@ const indexHTML = `
 		label { display:block; margin-top: 0.5rem; }
 		input[type="text"],
 		input[type="number"],
+		input[type="date"],
 		select {
 			width: 100%;
 			padding: 0.4rem 0.5rem;
@@ -447,7 +777,7 @@ const indexHTML = `
 			padding: 0.4rem 0.3rem;
 			text-align: left;
 		}
-		th { font-size: 0.85rem; text-transform: uppercase; color:#9ca3af; }
+		th { font-size: 0.80rem; text-transform: uppercase; color:#9ca3af; }
 		canvas {
 			max-width: 100%;
 			background: #111827;
@@ -463,13 +793,18 @@ const indexHTML = `
 			color:#9ca3af;
 		}
 		.row {
+			display: grid;
+			grid-template-columns: 1.2fr 1fr;
+			gap: 1rem;
+		}
+		.row-narrow {
 			display: grid;
 			grid-template-columns: 1fr;
 			gap: 1rem;
 		}
-		@media (min-width: 768px) {
+		@media (max-width: 900px) {
 			.row {
-				grid-template-columns: 1.1fr 0.9fr;
+				grid-template-columns: 1fr;
 			}
 		}
 		.flex-row {
@@ -484,34 +819,90 @@ const indexHTML = `
 			font-size:0.8rem;
 			color:#9ca3af;
 		}
+		.tag {
+			display:inline-block;
+			padding:0.1rem 0.4rem;
+			border-radius:999px;
+			font-size:0.7rem;
+			background:#111827;
+			color:#9ca3af;
+			cursor:pointer;
+		}
+		.tag:hover {
+			background:#374151;
+		}
 	</style>
 </head>
 <body>
 	<h1>Minimal Fitness Tracker</h1>
-	<p style="color:#9ca3af;">Simple self-hosted Go app – 5×5 friendly: pick standard lifts, track volume and rest.</p>
+	<p style="color:#9ca3af;">Self-hosted 5×5 log – A/B templates, volume, rest, and history.</p>
 
 	<div class="row">
 		<div>
 			<div class="card">
-				<h2>Workout</h2>
+				<h2>Workout control</h2>
 				{{if .HasWorkout}}
-					<p>Current workout ID: <span class="badge">{{.WorkoutID}}</span></p>
+					<p>
+						Current workout ID:
+						<span class="badge">{{.WorkoutID}}</span><br>
+						<span class="small">
+							Started: {{if .WorkoutStart}}{{.WorkoutStart.Format "2006-01-02 15:04"}} UTC{{else}}-{{end}}<br>
+							Ended: {{if .WorkoutEnd}}{{.WorkoutEnd.Format "2006-01-02 15:04"}} UTC{{else}}(active){{end}}<br>
+							Template:
+							{{if eq .WorkoutTemplate "A"}}
+								<span class="tag">A: Squat / Bench / Row</span>
+							{{else if eq .WorkoutTemplate "B"}}
+								<span class="tag">B: Squat / OHP / Deadlift / Chin-up</span>
+							{{else}}
+								<span class="small">None</span>
+							{{end}}
+						</span>
+					</p>
 				{{else}}
 					<p>No workout yet.</p>
 				{{end}}
 
-				<form method="POST" action="/start">
+				<form method="POST" action="/start" style="margin-top:0.5rem;">
+					<label>
+						Start new workout with template
+						<select name="template">
+							<option value="">None</option>
+							<option value="A">Workout A (Squat / Bench / Barbell Row)</option>
+							<option value="B">Workout B (Squat / Overhead Press / Deadlift / Chin-up)</option>
+						</select>
+					</label>
 					<button type="submit">Start new workout</button>
 				</form>
+
+				{{if .WorkoutActive}}
+				<form method="POST" action="/finish" style="display:inline-block;">
+					<button type="submit" style="background:#ef4444;">Finish workout</button>
+				</form>
+				{{end}}
 			</div>
 
 			<div class="card">
 				<h2>Add set</h2>
 				{{if .HasWorkout}}
+					{{if eq .WorkoutTemplate "A"}}
+						<p class="small">
+							Today: <span class="tag" onclick="setExercise('Squat')">Squat</span>
+							<span class="tag" onclick="setExercise('Bench Press')">Bench</span>
+							<span class="tag" onclick="setExercise('Barbell Row')">Row</span>
+						</p>
+					{{else if eq .WorkoutTemplate "B"}}
+						<p class="small">
+							Today: <span class="tag" onclick="setExercise('Squat')">Squat</span>
+							<span class="tag" onclick="setExercise('Overhead Press')">OHP</span>
+							<span class="tag" onclick="setExercise('Deadlift')">Deadlift</span>
+							<span class="tag" onclick="setExercise('Chin-up')">Chin-up</span>
+						</p>
+					{{end}}
+
 					<form method="POST" action="/add-set">
 						<label>
-							Exercise (5×5 core lifts & friends)
+							Exercise
-							<select name="exercise_select" id="exercise_select" required onchange="toggleCustomExercise()">
+							<select name="exercise_select" id="exercise_select" required onchange="toggleCustomExercise(); onExerciseChange();">
 								<option value="Squat">Squat</option>
 								<option value="Bench Press">Bench Press</option>
 								<option value="Barbell Row">Barbell Row</option>
@@ -534,13 +925,14 @@ const indexHTML = `
 
 						<label>
 							Reps
-							<input type="number" name="reps" min="1" step="1" required>
+							<input type="number" id="repsInput" name="reps" min="1" step="1" required>
 						</label>
 						<label>
 							Weight (kg)
-							<input type="number" name="weight" step="0.5" min="0" required>
+							<input type="number" id="weightInput" name="weight" step="0.5" min="0" required>
 						</label>
-						<button type="submit">Save set</button>
+						<button type="submit">Save set (end set)</button>
+						<p class="small">Tip: the time you press “Save set” is used as the set time. Rest between sets is calculated automatically.</p>
 					</form>
 				{{else}}
 					<p style="color:#fbbf24;">Start a workout first.</p>
@@ -599,6 +991,63 @@ const indexHTML = `
 		</div>
 	</div>
 
+	<div class="row-narrow">
+		<div class="card">
+			<h2>Workout history & filter</h2>
+			<form method="GET" action="/" class="flex-row" style="gap:0.75rem; flex-wrap:wrap;">
+				<div style="flex:1; min-width:160px;">
+					<label>From
+						<input type="date" name="from" value="{{.From}}">
+					</label>
+				</div>
+				<div style="flex:1; min-width:160px;">
+					<label>To
+						<input type="date" name="to" value="{{.To}}">
+					</label>
+				</div>
+				<div style="align-self:flex-end;">
+					<button type="submit">Filter</button>
+				</div>
+			</form>
+
+			{{if .Workouts}}
+				<table>
+					<thead>
+						<tr>
+							<th>ID</th>
+							<th>Date</th>
+							<th>Start</th>
+							<th>End</th>
+							<th>Dur.</th>
+							<th>Sets</th>
+							<th>Volume</th>
+							<th>Rest (approx.)</th>
+							<th>Tpl</th>
+						</tr>
+					</thead>
+					<tbody>
+						{{range .Workouts}}
+						<tr>
+							<td>{{.ID}}</td>
+							<td>{{.StartedAt.Format "2006-01-02"}}</td>
+							<td>{{.StartedAt.Format "15:04"}}</td>
+							<td>{{if .HasEnded}}{{.EndedAt.Format "15:04"}}{{else}}-{{end}}</td>
+							<td>{{.DurationHuman}}</td>
+							<td>{{.SetCount}}</td>
+							<td>{{printf "%.0f" .Volume}}</td>
+							<td>{{.RestHuman}}</td>
+							<td>{{.Template}}</td>
+						</tr>
+						{{end}}
+					</tbody>
+				</table>
+				<p class="small">Rest time is estimated from time between sets (button presses).</p>
+			{{else}}
+				<p>No workouts logged yet.</p>
+			{{end}}
+		</div>
+	</div>
+
 	<!-- Chart.js from CDN -->
 	<script src="https://cdn.jsdelivr.net/npm/chart.js"></script>
 	<script>
@@ -620,6 +1069,37 @@ const indexHTML = `
 			}
 		}
 
+		function setExercise(name) {
+			const select = document.getElementById('exercise_select');
+			select.value = name;
+			toggleCustomExercise();
+			onExerciseChange();
+		}
+
+		function onExerciseChange() {
+			const select = document.getElementById('exercise_select');
+			if (!select || select.value === 'custom') return;
+			loadLastSetForExercise(select.value);
+		}
+
+		function loadLastSetForExercise(exName) {
+			if (!exName || exName === 'custom') return;
+			fetch('/api/last-set?exercise=' + encodeURIComponent(exName))
+				.then(res => res.json())
+				.then(data => {
+					if (!data.found) return;
+					const repsInput = document.getElementById('repsInput');
+					const weightInput = document.getElementById('weightInput');
+					if (repsInput && (!repsInput.value || repsInput.value === '0')) {
+						repsInput.value = data.reps;
+					}
+					if (weightInput && (!weightInput.value || weightInput.value === '0')) {
+						weightInput.value = data.weight;
+					}
+				})
+				.catch(() => {});
+		}
+
 		function loadRestTimes() {
 			fetch('/api/rest-times')
 				.then(res => {
@@ -742,6 +1222,7 @@ const indexHTML = `
 
 		document.addEventListener('DOMContentLoaded', () => {
 			toggleCustomExercise();
+			onExerciseChange();
 			loadRestTimes();
 			loadVolumeStats();
 		});

readme.md

@@ -0,0 +1,14 @@
+cd ~/Dokumenti/scripts/Fitnes-tracker
+
+# Stop the container
+docker compose down
+
+# Create the folder if it doesn't exist (safe to run even if it exists)
+mkdir -p fitness-data
+
+# Make sure container user (uid 1000) can write there
+sudo chown -R 1000:1000 fitness-data
+sudo chmod 775 fitness-data
+
+# Start again
+docker compose up