feat: implement remove command with sequential removals

tests/contract/remove_command_ledger_test.go

@@ -0,0 +1,104 @@
+package contract
+
+import (
+	"bytes"
+	"encoding/json"
+	"os"
+	"path/filepath"
+	"testing"
+
+	renamercmd "github.com/rogeecn/renamer/cmd"
+	"github.com/rogeecn/renamer/internal/history"
+)
+
+func TestRemoveCommandLedgerMetadata(t *testing.T) {
+	tmp := t.TempDir()
+
+	createRemoveFile(t, filepath.Join(tmp, "report copy draft.txt"))
+	createRemoveFile(t, filepath.Join(tmp, "notes draft.txt"))
+
+	root := renamercmd.NewRootCommand()
+	var out bytes.Buffer
+	root.SetOut(&out)
+	root.SetErr(&out)
+	root.SetArgs([]string{"remove", " copy", " draft", "--path", tmp, "--yes"})
+
+	if err := root.Execute(); err != nil {
+		t.Fatalf("remove command error: %v\noutput: %s", err, out.String())
+	}
+
+	ledgerPath := filepath.Join(tmp, ".renamer")
+	data, err := os.ReadFile(ledgerPath)
+	if err != nil {
+		t.Fatalf("read ledger: %v", err)
+	}
+
+	lines := bytes.Split(bytes.TrimSpace(data), []byte("\n"))
+	if len(lines) == 0 {
+		t.Fatalf("expected ledger entry written")
+	}
+
+	var entry history.Entry
+	if err := json.Unmarshal(lines[len(lines)-1], &entry); err != nil {
+		t.Fatalf("decode ledger entry: %v", err)
+	}
+
+	if entry.Command != "remove" {
+		t.Fatalf("expected remove command recorded, got %q", entry.Command)
+	}
+
+	tokensVal, ok := entry.Metadata["tokens"].([]any)
+	if !ok {
+		t.Fatalf("expected tokens metadata, got %#v", entry.Metadata)
+	}
+	tokens := make([]string, len(tokensVal))
+	for i, v := range tokensVal {
+		s, ok := v.(string)
+		if !ok {
+			t.Fatalf("token entry not string: %#v", v)
+		}
+		tokens[i] = s
+	}
+	if len(tokens) != 2 || tokens[0] != " copy" || tokens[1] != " draft" {
+		t.Fatalf("unexpected tokens metadata: %#v", tokens)
+	}
+
+	matchesVal, ok := entry.Metadata["matches"].(map[string]any)
+	if !ok {
+		t.Fatalf("expected matches metadata, got %#v", entry.Metadata)
+	}
+	if len(matchesVal) != 2 {
+		t.Fatalf("unexpected matches metadata: %#v", matchesVal)
+	}
+	if toFloat(matchesVal[" copy"]) != 1 || toFloat(matchesVal[" draft"]) != 2 {
+		t.Fatalf("unexpected match counts: %#v", matchesVal)
+	}
+
+	// Ensure undo restores originals for automation workflows.
+	undo := renamercmd.NewRootCommand()
+	undo.SetOut(&bytes.Buffer{})
+	undo.SetErr(&bytes.Buffer{})
+	undo.SetArgs([]string{"undo", "--path", tmp})
+	if err := undo.Execute(); err != nil {
+		t.Fatalf("undo command error: %v", err)
+	}
+
+	if _, err := os.Stat(filepath.Join(tmp, "report copy draft.txt")); err != nil {
+		t.Fatalf("expected original restored after undo: %v", err)
+	}
+}
+
+func toFloat(value any) float64 {
+	switch v := value.(type) {
+	case float64:
+		return v
+	case float32:
+		return float64(v)
+	case int:
+		return float64(v)
+	case int64:
+		return float64(v)
+	default:
+		return -1
+	}
+}