chore: refactor

hooks/useFiles.ts

@@ -0,0 +1,84 @@
+import { BaseItemDto } from "@jellyfin/sdk/lib/generated-client/models";
+import AsyncStorage from "@react-native-async-storage/async-storage";
+import { useQueryClient } from "@tanstack/react-query";
+import * as FileSystem from "expo-file-system";
+
+/**
+ * Custom hook for managing downloaded files.
+ * @returns An object with functions to delete individual files and all files.
+ */
+export const useFiles = () => {
+  const queryClient = useQueryClient();
+
+  /**
+   * Deletes all downloaded files and clears the download record.
+   */
+  const deleteAllFiles = async (): Promise<void> => {
+    const directoryUri = FileSystem.documentDirectory;
+    if (!directoryUri) {
+      console.error("Document directory is undefined");
+      return;
+    }
+
+    try {
+      const fileNames = await FileSystem.readDirectoryAsync(directoryUri);
+      await Promise.all(
+        fileNames.map((item) =>
+          FileSystem.deleteAsync(`${directoryUri}/${item}`, {
+            idempotent: true,
+          }),
+        ),
+      );
+      await AsyncStorage.removeItem("downloaded_files");
+      queryClient.invalidateQueries({ queryKey: ["downloaded_files"] });
+    } catch (error) {
+      console.error("Failed to delete all files:", error);
+    }
+  };
+
+  /**
+   * Deletes a specific file and updates the download record.
+   * @param id - The ID of the file to delete.
+   */
+  const deleteFile = async (id: string): Promise<void> => {
+    if (!id) {
+      console.error("Invalid file ID");
+      return;
+    }
+
+    try {
+      await FileSystem.deleteAsync(
+        `${FileSystem.documentDirectory}/${id}.mp4`,
+        { idempotent: true },
+      );
+
+      const currentFiles = await getDownloadedFiles();
+      const updatedFiles = currentFiles.filter((f) => f.Id !== id);
+
+      await AsyncStorage.setItem(
+        "downloaded_files",
+        JSON.stringify(updatedFiles),
+      );
+
+      queryClient.invalidateQueries({ queryKey: ["downloaded_files"] });
+    } catch (error) {
+      console.error(`Failed to delete file with ID ${id}:`, error);
+    }
+  };
+
+  return { deleteFile, deleteAllFiles };
+};
+
+/**
+ * Retrieves the list of downloaded files from AsyncStorage.
+ * @returns An array of BaseItemDto objects representing downloaded files.
+ */
+async function getDownloadedFiles(): Promise<BaseItemDto[]> {
+  try {
+    const filesJson = await AsyncStorage.getItem("downloaded_files");
+    return filesJson ? JSON.parse(filesJson) : [];
+  } catch (error) {
+    console.error("Failed to retrieve downloaded files:", error);
+    return [];
+  }
+}