feat(intergration): history search

intergration/history.go

@@ -0,0 +1,101 @@
+package intergration
+
+import (
+	"bufio"
+	"os"
+	"path/filepath"
+	"strings"
+	"sync"
+
+	"github.com/versenilvis/fuzzyvn"
+)
+
+var (
+	historyCache  []string
+	idMapCache    map[string]int
+	searcherCache *fuzzyvn.Searcher
+	mu            sync.Mutex
+)
+
+type HistResult struct {
+	ID  int
+	Cmd string
+}
+
+func init() {
+	idMapCache = make(map[string]int)
+}
+
+// SearchHistory reads the zsh history and searches using fuzzyvn (my own pkg)
+func SearchHistory(query string) ([]HistResult, error) {
+	mu.Lock()
+	defer mu.Unlock()
+
+	// lazy load history if cache is empty
+	if len(historyCache) == 0 {
+		home, err := os.UserHomeDir()
+		if err != nil {
+			return nil, err
+		}
+
+		histFile := filepath.Join(home, ".zsh_history")
+		file, err := os.Open(histFile)
+		if err != nil {
+			return nil, err
+		}
+		defer file.Close()
+
+		seen := make(map[string]bool)
+		counter := 1
+		scanner := bufio.NewScanner(file)
+		for scanner.Scan() {
+			line := scanner.Text()
+			// zsh history format: : <timestamp>;<command>
+			parts := strings.SplitN(line, ";", 2)
+			cmd := line
+			if len(parts) == 2 {
+				cmd = parts[1]
+			}
+
+			cmd = strings.TrimSpace(cmd)
+			if cmd != "" {
+				if !seen[cmd] {
+					historyCache = append(historyCache, cmd)
+					seen[cmd] = true
+				}
+				idMapCache[cmd] = counter
+			}
+			counter++
+		}
+		searcherCache = fuzzyvn.NewPlainSearcher(historyCache)
+	}
+
+	if query == "" {
+		var results []HistResult
+		limit := 100
+		if len(historyCache) < limit {
+			limit = len(historyCache)
+		}
+
+		for i := 0; i < limit; i++ {
+			cmd := historyCache[len(historyCache)-1-i]
+			results = append(results, HistResult{
+				ID:  idMapCache[cmd],
+				Cmd: cmd,
+			})
+		}
+		return results, nil
+	}
+
+	matches := searcherCache.Search(query, &fuzzyvn.SearchOptions{Limit: 100})
+
+	var results []HistResult
+	for _, m := range matches {
+		results = append(results, HistResult{
+			ID:  idMapCache[m],
+			Cmd: m,
+		})
+	}
+
+	return results, nil
+}