feat: stat directory listing

Closes #47

Author: alpha0010

README.md

@@ -156,6 +156,10 @@ type FileStat = {
 
 - Read file metadata.
 
+`FileSystem.statDir(path: string): Promise<FileStat[]>`
+
+- Read metadata of all files in a directory.
+
 `FileSystem.unlink(path: string): Promise<void>`
 
 - Delete a file.

android/src/main/java/com/alpha0010/fs/FileAccessModule.kt

@@ -373,17 +373,7 @@ class FileAccessModule(reactContext: ReactApplicationContext) :
       try {
         val file = parsePathToFile(path)
         if (file.exists()) {
-          promise.resolve(
-            Arguments.makeNativeMap(
-              mapOf(
-                "filename" to file.name,
-                "lastModified" to file.lastModified(),
-                "path" to file.path,
-                "size" to file.length(),
-                "type" to if (file.isDirectory) "directory" else "file",
-              )
-            )
-          )
+          promise.resolve(statFile(file))
         } else {
           promise.reject("ENOENT", "'$path' does not exist.")
         }
@@ -393,6 +383,21 @@ class FileAccessModule(reactContext: ReactApplicationContext) :
     }
   }
 
+  @ReactMethod
+  fun statDir(path: String, promise: Promise) {
+    ioScope.launch {
+      try {
+        val fileList = Arguments.createArray()
+        parsePathToFile(path).listFiles()?.forEach {
+          fileList.pushMap(statFile(it))
+        }
+        promise.resolve(fileList)
+      } catch (e: Throwable) {
+        promise.reject(e)
+      }
+    }
+  }
+
   @ReactMethod
   fun unlink(path: String, promise: Promise) {
     ioScope.launch {
@@ -472,4 +477,16 @@ class FileAccessModule(reactContext: ReactApplicationContext) :
       parsePathToFile(path).inputStream()
     }
   }
+
+  private fun statFile(file: File): ReadableMap {
+    return Arguments.makeNativeMap(
+      mapOf(
+        "filename" to file.name,
+        "lastModified" to file.lastModified(),
+        "path" to file.path,
+        "size" to file.length(),
+        "type" to if (file.isDirectory) "directory" else "file",
+      )
+    )
+  }
 }

ios/FileAccess.m

@@ -73,6 +73,10 @@ @interface RCT_EXTERN_REMAP_MODULE(RNFileAccess, FileAccess, NSObject)
                  withResolver:(RCTPromiseResolveBlock)resolve
                  withRejecter:(RCTPromiseRejectBlock)reject)
 
+RCT_EXTERN_METHOD(statDir:(NSString *)path
+                 withResolver:(RCTPromiseResolveBlock)resolve
+                 withRejecter:(RCTPromiseRejectBlock)reject)
+
 RCT_EXTERN_METHOD(unlink:(NSString *)path
                  withResolver:(RCTPromiseResolveBlock)resolve
                  withRejecter:(RCTPromiseRejectBlock)reject)

ios/FileAccess.swift

@@ -276,21 +276,26 @@ class FileAccess: RCTEventEmitter {
     func stat(path: String, resolve: @escaping RCTPromiseResolveBlock, reject: @escaping RCTPromiseRejectBlock) -> Void {
         DispatchQueue.global().async {
             do {
-                let pathUrl = URL(fileURLWithPath: path.path())
-                let attrs = try FileManager.default.attributesOfItem(atPath: path.path())
-                resolve([
-                    "filename": pathUrl.lastPathComponent,
-                    "lastModified": 1000 * (attrs[.modificationDate] as! NSDate).timeIntervalSince1970,
-                    "path": pathUrl.path,
-                    "size": attrs[.size],
-                    "type": self.checkIfIsDirectory(path: path).isDirectory ? "directory" : "file"
-                ])
+                resolve(try self.statFile(path: path))
             } catch {
                 reject("ERR", "Failed to stat '\(path)'.", error)
             }
         }
     }
 
+    @objc(statDir:withResolver:withRejecter:)
+    func statDir(path: String, resolve: @escaping RCTPromiseResolveBlock, reject: @escaping RCTPromiseRejectBlock) -> Void {
+        DispatchQueue.global().async {
+            do {
+                try resolve(FileManager.default.contentsOfDirectory(atPath: path.path())
+                    .map { try self.statFile(path: "\(path)/\($0)") }
+                )
+            } catch {
+                reject("ERR", "Failed to list '\(path)'.", error)
+            }
+        }
+    }
+
     @objc(unlink:withResolver:withRejecter:)
     func unlink(path: String, resolve: @escaping RCTPromiseResolveBlock, reject: @escaping RCTPromiseRejectBlock) -> Void {
         DispatchQueue.global().async {
@@ -340,4 +345,16 @@ class FileAccess: RCTEventEmitter {
         let isDirectory = isDir.boolValue
         return (exists, isDirectory)
     }
+
+    private func statFile(path: String) throws -> [String : Any?] {
+        let pathUrl = URL(fileURLWithPath: path.path())
+        let attrs = try FileManager.default.attributesOfItem(atPath: path.path())
+        return [
+            "filename": pathUrl.lastPathComponent,
+            "lastModified": 1000 * (attrs[.modificationDate] as! NSDate).timeIntervalSince1970,
+            "path": pathUrl.path,
+            "size": attrs[.size],
+            "type": self.checkIfIsDirectory(path: path).isDirectory ? "directory" : "file"
+        ]
+    }
 }

src/index.ts

@@ -227,6 +227,13 @@ export const FileSystem = {
     return FileAccessNative.stat(path);
   },
 
+  /**
+   * Read metadata of all files in a directory.
+   */
+  statDir(path: string): Promise<FileStat[]> {
+    return FileAccessNative.statDir(path);
+  },
+
   /**
    * Delete a file.
    */

src/native.ts

@@ -52,6 +52,7 @@ type FileAccessType = {
   mv(source: string, target: string): Promise<void>;
   readFile(path: string, encoding: Encoding): Promise<string>;
   stat(path: string): Promise<FileStat>;
+  statDir(path: string): Promise<FileStat[]>;
   unlink(path: string): Promise<void>;
   unzip(source: string, target: string): Promise<void>;
   writeFile(path: string, data: string, encoding: Encoding): Promise<void>;