1 files changed, 104 insertions, 0 deletions
diff --git a/lib/client/src/channels.ts b/lib/client/src/channels.ts
new file mode 100644
index 0000000..b5fb817
--- /dev/null
+++ b/lib/client/src/channels.ts
@@ -0,0 +1,104 @@
+// Copyright (C) 2023 Vaughn Nugent
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+import { find, isEqual } from 'lodash';
+import { CMNextApi, CMNextIndex, ChannelMeta } from './types'
+
+export interface ChannelApi extends CMNextApi<ChannelMeta> {
+    /**
+     * Gets the endpoint url for the channel
+     */
+    readonly channelFile: string;
+}
+
+/**
+ * Gets the channel api for the given channel json file url
+ * @param endpoint The url of the channel json file
+ */
+export const createChannelApi = (channelFile: string): ChannelApi => {
+
+    const getIndex = async () : Promise<CMNextIndex<ChannelMeta>> => {
+        const res = await fetch(channelFile)
+        return await res.json()
+    }
+
+    return { channelFile, getIndex }
+}
+
+export interface ScopedChannelApi extends ChannelApi {
+    /**
+     * Gets the post index path for the currently selected channel
+     */
+    getPostIndexPath(): Promise<string | undefined>;
+    /**
+     * Gets the content index path for the currently selected channel
+     */
+    getContentIndexPath(): Promise<string | undefined>;
+    /**
+     * Gets the base dir for the currently selected channel
+     */
+    getBaseDir(): Promise<string | undefined>;
+    /**
+     * Gets the content dir for the currently selected channel
+     */
+    getContentDir(): Promise<string | undefined>;
+}
+
+export const createScopedChannelApi = (channelFile: string, channelId: string): ScopedChannelApi => {
+
+    const channelApi = createChannelApi(channelFile);
+
+    const getSelectedChannel = async (): Promise<ChannelMeta | undefined> => {
+        const index = await channelApi.getIndex()
+        //Get the selected channel from the channels
+        return find(index.records, i => isEqual(i.id, channelId))
+    }
+
+    //begin getting the selected channel
+    const index = getSelectedChannel();
+
+    const getPostIndexPath = async (): Promise<string | undefined> => {
+        //Await the selected channel index
+        const channel = await index
+        return channel ? `${channel.path}/${channel.index}` : undefined;
+    }
+
+    const getContentDir = async (): Promise<string | undefined> => {
+        //Await the selected channel index
+        const channel = await index
+        return channel ? channel.content : undefined;
+    }
+
+    const getBaseDir = async (): Promise<string | undefined> => {
+        //Await the selected channel index
+        const channel = await index
+        return channel ? channel.path : undefined;
+    }
+
+    const getContentIndexPath = async (): Promise<string | undefined> => {
+        //Await the selected channel index
+        const channel = await index
+        //Get the post index from the channel
+        return channel ? `${channel.path}/${channel.content}` : undefined;
+    }
+
+    return{
+        ...channelApi,
+        getBaseDir,
+        getContentDir,
+        getPostIndexPath,
+        getContentIndexPath,
+    }
+}
+\ No newline at end of file