Work on Editor and HomeScreen

hooks/useFilesystem.ts

@@ -3,6 +3,7 @@ import AsyncStorage from '@react-native-async-storage/async-storage';
 import * as FileSystem from 'expo-file-system';
 import { DATA_DIRECTORY_URI_KEY } from '@/constants/Settings';
 import { StorageAccessFramework } from 'expo-file-system';
+import { format } from 'date-fns';
 
 interface FileEntry {
     name: string;
@@ -21,16 +22,20 @@ interface FileInfoWithSize {
     size: number;
 }
 
-function datetimeFromFilename(filename: string): Date {
-    const match = filename.match(/(\d+)\.md$/);
+function datetimeFromFilename(filename: string): string {
+    const match = filename.match(/(\d+)-(\d+)-(\d+)-(\d+)-(\d+)-(\d+)\.md$/);
     if (match) {
-        const datePart = parseInt(match[1]) * 1000; // Convert seconds to milliseconds
-        const date = new Date(datePart);
-        if (!isNaN(date.getTime())) {
-            return date;
-        }
+        const [_, year, month, day, hour, minute, second] = match;
+        return new Date(
+            parseInt(year),
+            parseInt(month) - 1,
+            parseInt(day),
+            parseInt(hour),
+            parseInt(minute),
+            parseInt(second)
+        ).toISOString();
     }
-    return new Date();
+    return new Date().toISOString();
 }
 
 export function prettyName(uri: string | null, options: PrettyNameOptions = {}) {
@@ -123,10 +128,19 @@ export function useFileSystem() {
         loadFiles();
     }, [loadFiles]);
 
-    const writeFile = useCallback(async (filename: string, content: string) => {
+    const writeFile = useCallback(async (fileUriOrDatetime: string, content: string) => {
         if (!dataDirectoryUri) throw new Error('No directory selected');
-
-        const fileUri = `${dataDirectoryUri}/${filename}`;
+        const fileUriDatetime = new Date(parseInt(fileUriOrDatetime) * 1000);
+        let fileUri = fileUriOrDatetime;
+        if (parseInt(fileUriOrDatetime)) { // If it's a datetime in seconds
+            const filename = format(fileUriDatetime, 'yyyy-MM-dd-HH-mm-ss');
+            fileUri = await StorageAccessFramework.createFileAsync(
+                dataDirectoryUri,
+                `${filename}.md`,
+                'text/markdown'
+            );
+        }
+        // const fileUri = `${dataDirectoryUri}/${filename}`;
         await FileSystem.writeAsStringAsync(fileUri, content);
         await loadFiles(); // Refresh file list
     }, [dataDirectoryUri, loadFiles]);
@@ -138,6 +152,11 @@ export function useFileSystem() {
         return await FileSystem.readAsStringAsync(fileUri);
     }, [dataDirectoryUri]);
 
+    const deleteFile = useCallback(async (filename: string): Promise<void> => {
+        return await FileSystem.deleteAsync(filename, { idempotent: true });
+    }
+        , []);
+
     const saveDataDirectoryUri = useCallback(async (uri: string | null) => {
         try {
             if (uri) {
@@ -164,6 +183,7 @@ export function useFileSystem() {
         files,
         writeFile,
         readFile,
+        deleteFile,
         loadFiles,
         hasDirectory: !!dataDirectoryUri,
         directorySize,