Implement note editing

src/cli/edit.go

@@ -1,9 +1,12 @@
 package cli
 
 import (
+	"bufio"
 	"fmt"
 	"github.com/rwinkhart/MUTN/src/offline"
 	"os"
+	"os/exec"
+	"reflect"
 )
 
 // RenameCli renames an entry at oldLocation to a new location (user input)
@@ -42,14 +45,32 @@ func EditEntry(targetLocation string, hidePassword bool, field int) {
 	}
 
 	// write and preview the modified entry
-	if offline.EntryIsNotEmpty(unencryptedEntry) {
-		offline.WriteEntry(targetLocation, unencryptedEntry)
-		fmt.Println(ansiBold + "\nEntry Preview:" + offline.AnsiReset)
-		EntryReader(unencryptedEntry, hidePassword)
-	} else {
-		fmt.Println(offline.AnsiError + "No data supplied for entry" + offline.AnsiReset)
+	writeEntryShortcut(targetLocation, unencryptedEntry, hidePassword)
+}
+
+func EditEntryNote(targetLocation string, hidePassword bool) {
+	// ensure targetLocation exists
+	offline.TargetIsFile(targetLocation, true, 2)
+
+	// read old entry data
+	unencryptedEntry := offline.DecryptGPG(targetLocation)
+
+	// store non-note data separately
+	nonNoteData := unencryptedEntry[:3]
+
+	// store note data separately
+	noteData := unencryptedEntry[3:]
+
+	// edit the note
+	editedNote, noteEdited := editNote(noteData)
+	if !noteEdited { // exit early if the note was not edited
+		fmt.Println(offline.AnsiError + "Entry is unchanged" + offline.AnsiReset)
 		os.Exit(1)
 	}
+	unencryptedEntry = append(nonNoteData, editedNote...)
+
+	// write and preview the modified entry
+	writeEntryShortcut(targetLocation, unencryptedEntry, hidePassword)
 }
 
 // GenUpdate generates a new password for an entry at targetLocation (user input)
@@ -64,12 +85,53 @@ func GenUpdate(targetLocation string, hidePassword bool) {
 	unencryptedEntry[0] = offline.StringGen(inputInt("Password length:"), inputBinary("Generate a complex (special characters) password?"), 0.2)
 
 	// write and preview the modified entry
-	if offline.EntryIsNotEmpty(unencryptedEntry) {
-		offline.WriteEntry(targetLocation, unencryptedEntry)
-		fmt.Println(ansiBold + "\nEntry Preview:" + offline.AnsiReset)
-		EntryReader(unencryptedEntry, hidePassword)
-	} else {
-		fmt.Println(offline.AnsiError + "No data supplied for entry" + offline.AnsiReset)
+	writeEntryShortcut(targetLocation, unencryptedEntry, hidePassword)
+}
+
+// editNote uses the user-specified text editor to edit an existing note (or create a new one if baseNote is empty)
+// returns the edited note and a boolean indicating whether the note was edited
+func editNote(baseNote []string) ([]string, bool) {
+	tempFile := offline.CreateTempFile()
+	defer os.Remove(tempFile.Name())
+	editor := offline.ReadConfig([]string{"textEditor"})[0]
+
+	// write baseNote to tempFile (if it is not empty)
+	if len(baseNote) > 0 {
+		for _, line := range baseNote {
+			_, _ = tempFile.WriteString(line + "\n")
+		}
+	}
+
+	// edit the tempFile (note) with the user's text editor
+	cmd := exec.Command(editor, tempFile.Name())
+	cmd.Stdout = os.Stdout
+	cmd.Stdin = os.Stdin
+	cmd.Stderr = os.Stderr
+	err := cmd.Run()
+	if err != nil {
+		fmt.Println(offline.AnsiError + "Failed to write note with " + editor + offline.AnsiReset)
 		os.Exit(1)
 	}
+
+	// TODO does it need to be reopened?
+	file, err := os.Open(tempFile.Name())
+	if err != nil {
+		fmt.Println(offline.AnsiError + "Failed to open temporary file (\"" + tempFile.Name() + "\") " + err.Error() + offline.AnsiReset)
+		os.Exit(1)
+	}
+	defer file.Close()
+
+	// read the edited note from the tempFile
+	var note []string
+	scanner := bufio.NewScanner(file)
+	for scanner.Scan() {
+		note = append(note, scanner.Text())
+	}
+
+	// return the edited note if it is different from baseNote
+	if !reflect.DeepEqual(offline.RemoveTrailingEmptyStrings(note), baseNote) {
+		return note, true
+	} else {
+		return note, false
+	}
 }