cache v1 + debug mode + buttons on text results

cache.go

@@ -0,0 +1,55 @@
+package main
+
+import (
+	"fmt"
+	"sync"
+)
+
+// TextSearchResult represents a single search result item.
+type TextSearchResult struct {
+	URL         string
+	Header      string
+	Description string
+	Source      string
+}
+
+// CacheKey represents the key used to store search results in the cache.
+type CacheKey struct {
+	Query string
+	Page  int
+	Safe  string
+	Lang  string
+}
+
+// ResultsCache is a thread-safe map for caching search results by composite keys.
+type ResultsCache struct {
+	mu      sync.Mutex
+	results map[string][]TextSearchResult
+}
+
+// NewResultsCache creates a new ResultsCache.
+func NewResultsCache() *ResultsCache {
+	return &ResultsCache{
+		results: make(map[string][]TextSearchResult),
+	}
+}
+
+// Get retrieves the results for a given key from the cache.
+func (rc *ResultsCache) Get(key CacheKey) ([]TextSearchResult, bool) {
+	rc.mu.Lock()
+	defer rc.mu.Unlock()
+	results, exists := rc.results[rc.keyToString(key)]
+	return results, exists
+}
+
+// Set stores the results for a given key in the cache.
+func (rc *ResultsCache) Set(key CacheKey, results []TextSearchResult) {
+	rc.mu.Lock()
+	defer rc.mu.Unlock()
+	rc.results[rc.keyToString(key)] = results
+}
+
+// keyToString converts a CacheKey to a string representation.
+func (rc *ResultsCache) keyToString(key CacheKey) string {
+	return fmt.Sprintf("%s|%d|%s|%s", key.Query, key.Page, key.Safe, key.Lang)
+}