create template package

internal/babble/babble_test.go

@@ -41,7 +41,7 @@ func setupTestDB(t *testing.T) *database.DB {
 		(?, 'David', 'Server lag is really bad right now...'),
 		(?, 'Eve', 'Quick question about spell mechanics')`
 
-	timestamps := []interface{}{
+	timestamps := []any{
 		now - 3600*6, // 6 hours ago
 		now - 3600*4, // 4 hours ago
 		now - 3600*2, // 2 hours ago

internal/forum/forum_test.go

@@ -45,7 +45,7 @@ func setupTestDB(t *testing.T) *database.DB {
 		(?, ?, 2, 4, 0, 'Re: Bug Reports', 'Found a small issue with spell casting.'),
 		(?, ?, 3, 0, 0, 'Strategy Discussion', 'Let us discuss optimal character builds and strategies.')`
 
-	timestamps := []interface{}{
+	timestamps := []any{
 		now - 86400*7, now - 86400*1, // Thread 1, last activity 1 day ago
 		now - 86400*6, now - 86400*6, // Reply 1
 		now - 86400*1, now - 86400*1, // Reply 2 (most recent activity on thread 1)

internal/news/news_test.go

@@ -40,7 +40,7 @@ func setupTestDB(t *testing.T) *database.DB {
 		(3, ?, 'Fourth post from admin'),
 		(2, ?, 'Fifth post - maintenance notice')`
 
-	timestamps := []interface{}{
+	timestamps := []any{
 		now - 86400*7, // 1 week ago
 		now - 86400*5, // 5 days ago
 		now - 86400*2, // 2 days ago

internal/template/doc.go

@@ -0,0 +1,5 @@
+// Package template provides in-memory template caching with automatic reloading
+// and placeholder replacement functionality. Templates are loaded from files
+// adjacent to the binary and support both positional and named placeholder
+// replacement with dot notation for accessing nested map values.
+package template

internal/template/template.go

@@ -0,0 +1,226 @@
+package template
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+	"reflect"
+	"strings"
+	"sync"
+	"time"
+
+	"github.com/valyala/fasthttp"
+)
+
+type Cache struct {
+	mu        sync.RWMutex
+	templates map[string]*Template
+	basePath  string
+}
+
+type Template struct {
+	name     string
+	content  string
+	modTime  time.Time
+	filePath string
+}
+
+func NewCache(basePath string) *Cache {
+	if basePath == "" {
+		exe, err := os.Executable()
+		if err != nil {
+			basePath = "."
+		} else {
+			basePath = filepath.Dir(exe)
+		}
+	}
+
+	return &Cache{
+		templates: make(map[string]*Template),
+		basePath:  basePath,
+	}
+}
+
+func (c *Cache) Load(name string) (*Template, error) {
+	c.mu.RLock()
+	tmpl, exists := c.templates[name]
+	c.mu.RUnlock()
+
+	if exists {
+		if err := c.checkAndReload(tmpl); err != nil {
+			return nil, err
+		}
+		return tmpl, nil
+	}
+
+	return c.loadFromFile(name)
+}
+
+func (c *Cache) loadFromFile(name string) (*Template, error) {
+	filePath := filepath.Join(c.basePath, "templates", name)
+
+	info, err := os.Stat(filePath)
+	if err != nil {
+		return nil, fmt.Errorf("template file not found: %s", name)
+	}
+
+	content, err := os.ReadFile(filePath)
+	if err != nil {
+		return nil, fmt.Errorf("failed to read template: %w", err)
+	}
+
+	tmpl := &Template{
+		name:     name,
+		content:  string(content),
+		modTime:  info.ModTime(),
+		filePath: filePath,
+	}
+
+	c.mu.Lock()
+	c.templates[name] = tmpl
+	c.mu.Unlock()
+
+	return tmpl, nil
+}
+
+func (c *Cache) checkAndReload(tmpl *Template) error {
+	info, err := os.Stat(tmpl.filePath)
+	if err != nil {
+		return err
+	}
+
+	if info.ModTime().After(tmpl.modTime) {
+		content, err := os.ReadFile(tmpl.filePath)
+		if err != nil {
+			return err
+		}
+
+		c.mu.Lock()
+		tmpl.content = string(content)
+		tmpl.modTime = info.ModTime()
+		c.mu.Unlock()
+	}
+
+	return nil
+}
+
+func (t *Template) RenderPositional(args ...any) string {
+	result := t.content
+	for i, arg := range args {
+		placeholder := fmt.Sprintf("{%d}", i)
+		result = strings.ReplaceAll(result, placeholder, fmt.Sprintf("%v", arg))
+	}
+	return result
+}
+
+func (t *Template) RenderNamed(data map[string]any) string {
+	result := t.content
+
+	for key, value := range data {
+		placeholder := fmt.Sprintf("{%s}", key)
+		result = strings.ReplaceAll(result, placeholder, fmt.Sprintf("%v", value))
+	}
+
+	result = t.replaceDotNotation(result, data)
+
+	return result
+}
+
+func (t *Template) replaceDotNotation(content string, data map[string]any) string {
+	result := content
+
+	start := 0
+	for {
+		startIdx := strings.Index(result[start:], "{")
+		if startIdx == -1 {
+			break
+		}
+		startIdx += start
+
+		endIdx := strings.Index(result[startIdx:], "}")
+		if endIdx == -1 {
+			break
+		}
+		endIdx += startIdx
+
+		placeholder := result[startIdx+1 : endIdx]
+
+		if strings.Contains(placeholder, ".") {
+			value := t.getNestedValue(data, placeholder)
+			if value != nil {
+				result = result[:startIdx] + fmt.Sprintf("%v", value) + result[endIdx+1:]
+				start = startIdx + len(fmt.Sprintf("%v", value))
+				continue
+			}
+		}
+
+		start = endIdx + 1
+	}
+
+	return result
+}
+
+func (t *Template) getNestedValue(data map[string]any, path string) any {
+	keys := strings.Split(path, ".")
+	current := data
+
+	for i, key := range keys {
+		if i == len(keys)-1 {
+			return current[key]
+		}
+
+		next, ok := current[key]
+		if !ok {
+			return nil
+		}
+
+		switch v := next.(type) {
+		case map[string]any:
+			current = v
+		case map[any]any:
+			newMap := make(map[string]any)
+			for k, val := range v {
+				newMap[fmt.Sprintf("%v", k)] = val
+			}
+			current = newMap
+		default:
+			rv := reflect.ValueOf(next)
+			if rv.Kind() == reflect.Map {
+				newMap := make(map[string]any)
+				for _, k := range rv.MapKeys() {
+					newMap[fmt.Sprintf("%v", k.Interface())] = rv.MapIndex(k).Interface()
+				}
+				current = newMap
+			} else {
+				return nil
+			}
+		}
+	}
+
+	return nil
+}
+
+func (t *Template) WriteTo(ctx *fasthttp.RequestCtx, data any) {
+	var result string
+
+	switch v := data.(type) {
+	case map[string]any:
+		result = t.RenderNamed(v)
+	case []any:
+		result = t.RenderPositional(v...)
+	default:
+		rv := reflect.ValueOf(data)
+		if rv.Kind() == reflect.Slice {
+			args := make([]any, rv.Len())
+			for i := 0; i < rv.Len(); i++ {
+				args[i] = rv.Index(i).Interface()
+			}
+			result = t.RenderPositional(args...)
+		} else {
+			result = t.RenderPositional(data)
+		}
+	}
+
+	ctx.SetContentType("text/html; charset=utf-8")
+	ctx.WriteString(result)
+}

internal/template/template_test.go

@@ -0,0 +1,208 @@
+package template
+
+import (
+	"os"
+	"path/filepath"
+	"testing"
+	"time"
+)
+
+func TestNewCache(t *testing.T) {
+	cache := NewCache("")
+	if cache == nil {
+		t.Fatal("NewCache returned nil")
+	}
+	if cache.templates == nil {
+		t.Fatal("templates map not initialized")
+	}
+}
+
+func TestPositionalReplacement(t *testing.T) {
+	tmpl := &Template{
+		name:    "test",
+		content: "Hello {0}, you are {1} years old!",
+	}
+
+	result := tmpl.RenderPositional("Alice", 25)
+	expected := "Hello Alice, you are 25 years old!"
+
+	if result != expected {
+		t.Errorf("Expected %q, got %q", expected, result)
+	}
+}
+
+func TestNamedReplacement(t *testing.T) {
+	tmpl := &Template{
+		name:    "test",
+		content: "Hello {name}, you are {age} years old!",
+	}
+
+	data := map[string]any{
+		"name": "Bob",
+		"age":  30,
+	}
+
+	result := tmpl.RenderNamed(data)
+	expected := "Hello Bob, you are 30 years old!"
+
+	if result != expected {
+		t.Errorf("Expected %q, got %q", expected, result)
+	}
+}
+
+func TestDotNotationReplacement(t *testing.T) {
+	tmpl := &Template{
+		name:    "test",
+		content: "User: {user.name}, Email: {user.contact.email}",
+	}
+
+	data := map[string]any{
+		"user": map[string]any{
+			"name": "Charlie",
+			"contact": map[string]any{
+				"email": "charlie@example.com",
+			},
+		},
+	}
+
+	result := tmpl.RenderNamed(data)
+	expected := "User: Charlie, Email: charlie@example.com"
+
+	if result != expected {
+		t.Errorf("Expected %q, got %q", expected, result)
+	}
+}
+
+func TestTemplateLoadingAndCaching(t *testing.T) {
+	tmpDir, err := os.MkdirTemp("", "template_test")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer os.RemoveAll(tmpDir)
+
+	templatesDir := filepath.Join(tmpDir, "templates")
+	err = os.MkdirAll(templatesDir, 0755)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	templateFile := filepath.Join(templatesDir, "test.html")
+	content := "Hello {name}!"
+	err = os.WriteFile(templateFile, []byte(content), 0644)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	cache := NewCache(tmpDir)
+
+	tmpl, err := cache.Load("test.html")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if tmpl.content != content {
+		t.Errorf("Expected content %q, got %q", content, tmpl.content)
+	}
+
+	tmpl2, err := cache.Load("test.html")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if tmpl != tmpl2 {
+		t.Error("Template should be cached and return same instance")
+	}
+}
+
+func TestTemplateReloading(t *testing.T) {
+	tmpDir, err := os.MkdirTemp("", "template_test")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer os.RemoveAll(tmpDir)
+
+	templatesDir := filepath.Join(tmpDir, "templates")
+	err = os.MkdirAll(templatesDir, 0755)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	templateFile := filepath.Join(templatesDir, "test.html")
+	content1 := "Hello {name}!"
+	err = os.WriteFile(templateFile, []byte(content1), 0644)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	cache := NewCache(tmpDir)
+
+	tmpl, err := cache.Load("test.html")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if tmpl.content != content1 {
+		t.Errorf("Expected content %q, got %q", content1, tmpl.content)
+	}
+
+	time.Sleep(10 * time.Millisecond)
+
+	content2 := "Hi {name}, welcome!"
+	err = os.WriteFile(templateFile, []byte(content2), 0644)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	tmpl2, err := cache.Load("test.html")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if tmpl2.content != content2 {
+		t.Errorf("Expected reloaded content %q, got %q", content2, tmpl2.content)
+	}
+}
+
+func TestGetNestedValue(t *testing.T) {
+	tmpl := &Template{}
+
+	data := map[string]any{
+		"level1": map[string]any{
+			"level2": map[string]any{
+				"value": "found",
+			},
+		},
+	}
+
+	result := tmpl.getNestedValue(data, "level1.level2.value")
+	if result != "found" {
+		t.Errorf("Expected 'found', got %v", result)
+	}
+
+	result = tmpl.getNestedValue(data, "level1.nonexistent")
+	if result != nil {
+		t.Errorf("Expected nil for nonexistent path, got %v", result)
+	}
+}
+
+func TestMixedReplacementTypes(t *testing.T) {
+	tmpl := &Template{
+		name:    "test",
+		content: "Hello {name}, you have {count} {items.type}s!",
+	}
+
+	data := map[string]any{
+		"name":  "Dave",
+		"count": 5,
+		"items": map[string]any{
+			"type": "apple",
+		},
+	}
+
+	result := tmpl.RenderNamed(data)
+	expected := "Hello Dave, you have 5 apples!"
+
+	if result != expected {
+		t.Errorf("Expected %q, got %q", expected, result)
+	}
+}

internal/users/doc.go

@@ -223,8 +223,8 @@ The builder automatically sets sensible defaults for all fields if not specified
 
 	// Get all equipment
 	equipment := user.GetEquipment()
-	weapon := equipment["weapon"].(map[string]interface{})
-	armor := equipment["armor"].(map[string]interface{})
+	weapon := equipment["weapon"].(map[string]any)
+	armor := equipment["armor"].(map[string]any)
 
 	fmt.Printf("Weapon: %s (ID: %d)\n", weapon["name"], weapon["id"])
 	fmt.Printf("Armor: %s (ID: %d)\n", armor["name"], armor["id"])

internal/users/users.go

@@ -382,14 +382,14 @@ func (u *User) HasVisitedTown(townID string) bool {
 }
 
 // GetEquipment returns all equipped item information
-func (u *User) GetEquipment() map[string]interface{} {
-	return map[string]interface{}{
-		"weapon": map[string]interface{}{"id": u.WeaponID, "name": u.WeaponName},
-		"armor":  map[string]interface{}{"id": u.ArmorID, "name": u.ArmorName},
-		"shield": map[string]interface{}{"id": u.ShieldID, "name": u.ShieldName},
-		"slot1":  map[string]interface{}{"id": u.Slot1ID, "name": u.Slot1Name},
-		"slot2":  map[string]interface{}{"id": u.Slot2ID, "name": u.Slot2Name},
-		"slot3":  map[string]interface{}{"id": u.Slot3ID, "name": u.Slot3Name},
+func (u *User) GetEquipment() map[string]any {
+	return map[string]any{
+		"weapon": map[string]any{"id": u.WeaponID, "name": u.WeaponName},
+		"armor":  map[string]any{"id": u.ArmorID, "name": u.ArmorName},
+		"shield": map[string]any{"id": u.ShieldID, "name": u.ShieldName},
+		"slot1":  map[string]any{"id": u.Slot1ID, "name": u.Slot1Name},
+		"slot2":  map[string]any{"id": u.Slot2ID, "name": u.Slot2Name},
+		"slot3":  map[string]any{"id": u.Slot3ID, "name": u.Slot3Name},
 	}
 }
 

internal/users/users_test.go

@@ -87,7 +87,7 @@ func setupTestDB(t *testing.T) *database.DB {
 		('charlie', 'hashed_pass_3', 'charlie@example.com', 0, 'verify_token_123', ?, ?, 4, 0, 0, 3, 1, 100, 0, 15, 0, 10, 15, 0, 10, 5, 5, 5, 5, '', ''),
 		('diana', 'hashed_pass_4', 'diana@example.com', 1, '', ?, ?, 0, 25, -10, 1, 8, 1200, 3500, 35, 25, 15, 35, 25, 15, 12, 10, 15, 12, '1,2,3,6,7', '1,2,3,4')`
 
-	timestamps := []interface{}{
+	timestamps := []any{
 		now - 86400*7, now - 3600*2, // alice: registered 1 week ago, last online 2 hours ago
 		now - 86400*5, now - 86400*1, // bob: registered 5 days ago, last online 1 day ago
 		now - 86400*1, now - 86400*1, // charlie: registered 1 day ago, last online 1 day ago
@@ -644,7 +644,7 @@ func TestGetEquipmentAndStats(t *testing.T) {
 		t.Error("Expected non-nil equipment map")
 	}
 
-	weapon, ok := equipment["weapon"].(map[string]interface{})
+	weapon, ok := equipment["weapon"].(map[string]any)
 	if !ok {
 		t.Error("Expected weapon to be a map")
 	}