From 70254f3bd6ce5f8d1de7dd52342e3dfb9d913120 Mon Sep 17 00:00:00 2001
From: Joshua Pohl <josh@lightpohl.me>
Date: Fri, 16 Feb 2024 22:36:29 -1000
Subject: [PATCH] feat: add support for '--file' parsing

closes #64
---
 README.md        |  5 ++++-
 bin/bin.js       | 19 ++++++++++++++-----
 bin/commander.js |  1 +
 bin/util.js      | 47 +++++++++++++++++++++++++++++++++++++++++++++--
 4 files changed, 64 insertions(+), 8 deletions(-)

diff --git a/README.md b/README.md
index b4ec776..c839560 100644
--- a/README.md
+++ b/README.md
@@ -20,11 +20,14 @@ A CLI for downloading podcasts with a focus on archiving.
 
 ## Options
 
+Either `--url` or `--file` must be provided.
+
 Type values surrounded in square brackets (`[]`) can be used as used as boolean options (no argument required).
 
 | Option                   | Type                | Required | Description                                                                                                                                                                                                                 |
 | ------------------------ | ------------------- | -------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
-| --url                    | String              | true     | URL to podcast RSS feed.                                                                                                                                                                                                    |
+| --url                    | String              | true\*   | URL to podcast RSS feed.                                                                                                                                                                                                    |
+| --file                   | String              | true\*   | Path to local RSS file.                                                                                                                                                                                                     |
 | --out-dir                | String              | false    | Specify output directory for episodes and metadata. Defaults to "./{{podcast_title}}". See "Template Options" for more details.                                                                                             |
 | --threads                | Number              | false    | Determines the number of downloads that will happen concurrently. Default is 1.                                                                                                                                             |
 | --attempts               | Number              | false    | Sets the number of download attempts per individual file. Default is 3.                                                                                                                                                     |
diff --git a/bin/bin.js b/bin/bin.js
index dee0f9b..2f7f7c8 100755
--- a/bin/bin.js
+++ b/bin/bin.js
@@ -10,10 +10,11 @@ import { setupCommander } from "./commander.js";
 import { download } from "./async.js";
 import {
   getArchiveKey,
-  getFeed,
+  getFileFeed,
   getImageUrl,
   getItemsToDownload,
   getUrlExt,
+  getUrlFeed,
   logFeedInfo,
   logItemsList,
   writeFeedMeta,
@@ -31,6 +32,7 @@ import { downloadItemsAsync } from "./async.js";
 setupCommander(commander, process.argv);
 
 const {
+  file,
   url,
   outDir,
   episodeTemplate,
@@ -62,17 +64,24 @@ const {
 let { archive } = commander;
 
 const main = async () => {
-  if (!url) {
-    logErrorAndExit("No URL provided");
+  if (!url && !file) {
+    logErrorAndExit("No URL or file location provided");
+  }
+
+  if (url && file) {
+    logErrorAndExit("Must not use URL and file location");
   }
 
   if (proxy) {
     bootstrapProxy();
   }
 
-  const { hostname, pathname } = new URL(url);
+  const feed = url
+    ? await getUrlFeed(url, parserConfig)
+    : await getFileFeed(file, parserConfig);
+
+  const { hostname, pathname } = new URL(feed.feedUrl);
   const archiveUrl = `${hostname}${pathname}`;
-  const feed = await getFeed(url, parserConfig);
   const basePath = _path.resolve(
     process.cwd(),
     getFolderName({ feed, template: outDir })
diff --git a/bin/commander.js b/bin/commander.js
index 315ebab..786317c 100644
--- a/bin/commander.js
+++ b/bin/commander.js
@@ -5,6 +5,7 @@ import { logErrorAndExit } from "./logger.js";
 export const setupCommander = (commander, argv) => {
   commander
     .option("--url <string>", "url to podcast rss feed")
+    .option("--file <path>", "local path to podcast rss feed")
     .option(
       "--out-dir <path>",
       "specify output directory",
diff --git a/bin/util.js b/bin/util.js
index 7bbe956..28338c7 100644
--- a/bin/util.js
+++ b/bin/util.js
@@ -64,6 +64,22 @@ const getPublicObject = (object, exclude = []) => {
   return output;
 };
 
+const getFileString = (filePath) => {
+  const fullPath = path.resolve(process.cwd(), filePath);
+
+  if (!fs.existsSync(fullPath)) {
+    return null;
+  }
+
+  const data = fs.readFileSync(fullPath, "utf8");
+
+  if (!data) {
+    return null;
+  }
+
+  return data;
+};
+
 const getJsonFile = (filePath) => {
   const fullPath = path.resolve(process.cwd(), filePath);
 
@@ -453,7 +469,33 @@ const getImageUrl = ({ image, itunes }) => {
   return null;
 };
 
-const getFeed = async (url, parserConfig) => {
+const getFileFeed = async (filePath, parserConfig) => {
+  const defaultConfig = {
+    defaultRSS: 2.0,
+  };
+
+  const config = parserConfig ? getJsonFile(parserConfig) : defaultConfig;
+  const rssString = getFileString(filePath);
+
+  console.log(filePath, "rss string", rssString);
+
+  if (parserConfig && !config) {
+    logErrorAndExit(`Unable to load parser config: ${parserConfig}`);
+  }
+
+  const parser = new rssParser(config);
+
+  let feed;
+  try {
+    feed = await parser.parseString(rssString);
+  } catch (err) {
+    logErrorAndExit("Unable to parse RSS URL", err);
+  }
+
+  return feed;
+};
+
+const getUrlFeed = async (url, parserConfig) => {
   const defaultConfig = {
     defaultRSS: 2.0,
   };
@@ -589,11 +631,12 @@ export {
   getArchiveKey,
   writeToArchive,
   getEpisodeAudioUrlAndExt,
-  getFeed,
+  getFileFeed,
   getImageUrl,
   getItemsToDownload,
   getTempPath,
   getUrlExt,
+  getUrlFeed,
   logFeedInfo,
   ITEM_LIST_FORMATS,
   logItemsList,