docs: add comments for all functions

web/global/hashStorage.go

@@ -8,18 +8,21 @@ import (
 	"time"
 )
 
+// HashEntry represents a stored hash entry with its value and timestamp.
 type HashEntry struct {
-	Hash      string
-	Value     string
-	Timestamp time.Time
+	Hash      string    // MD5 hash string
+	Value     string    // Original value
+	Timestamp time.Time // Time when the hash was created
 }
 
+// HashStorage provides thread-safe storage for hash-value pairs with expiration.
 type HashStorage struct {
 	sync.RWMutex
-	Data       map[string]HashEntry
-	Expiration time.Duration
+	Data       map[string]HashEntry // Map of hash to entry
+	Expiration time.Duration        // Expiration duration for entries
 }
 
+// NewHashStorage creates a new HashStorage instance with the specified expiration duration.
 func NewHashStorage(expiration time.Duration) *HashStorage {
 	return &HashStorage{
 		Data:       make(map[string]HashEntry),
@@ -27,6 +30,7 @@ func NewHashStorage(expiration time.Duration) *HashStorage {
 	}
 }
 
+// SaveHash generates an MD5 hash for the given query string and stores it with a timestamp.
 func (h *HashStorage) SaveHash(query string) string {
 	h.Lock()
 	defer h.Unlock()
@@ -45,6 +49,7 @@ func (h *HashStorage) SaveHash(query string) string {
 	return md5HashString
 }
 
+// GetValue retrieves the original value for the given hash, returning true if found.
 func (h *HashStorage) GetValue(hash string) (string, bool) {
 	h.RLock()
 	defer h.RUnlock()
@@ -54,11 +59,13 @@ func (h *HashStorage) GetValue(hash string) (string, bool) {
 	return entry.Value, exists
 }
 
+// IsMD5 checks if the given string is a valid 32-character MD5 hash.
 func (h *HashStorage) IsMD5(hash string) bool {
 	match, _ := regexp.MatchString("^[a-f0-9]{32}$", hash)
 	return match
 }
 
+// RemoveExpiredHashes removes all hash entries that have exceeded the expiration duration.
 func (h *HashStorage) RemoveExpiredHashes() {
 	h.Lock()
 	defer h.Unlock()
@@ -72,6 +79,7 @@ func (h *HashStorage) RemoveExpiredHashes() {
 	}
 }
 
+// Reset clears all stored hash entries.
 func (h *HashStorage) Reset() {
 	h.Lock()
 	defer h.Unlock()