Update README.md

[rbdr/blog] / lib / blog.js

diff --git a/lib/blog.js b/lib/blog.js
index 9024a00b95ce825ed5e0244bc322a9fe1762ec36..e1a76a8d848e2803d6f116495307f7d66698d8c3 100644 (file)
--- a/lib/blog.js
+++ b/lib/blog.js
@@ -1,33 +1,43 @@
-'use strict';
+import { access, cp, readdir, readFile, writeFile } from 'fs/promises';
+import { exec } from 'child_process';
+import { basename, join } from 'path';
+import ParseGemini from 'gemini-to-html/parse.js';
+import RenderGemini from 'gemini-to-html/render.js';
+import { debuglog, promisify } from 'util';
+import { ensureDirectoryExists, rmIfExists } from './utils.js';
+import { kFileNotFoundError } from './constants.js';

 
 

-const { exec } = require('child_process');
-const { access, mkdir, readdir, readFile, rmdir, writeFile } = require('fs/promises');
-const { template } = require('dot');
-const { ncp } = require('ncp');
-const { join } = require('path');
-const Marked = require('marked');
-const { debuglog, promisify } = require('util');
+// Generators for the Blog
+
+import StaticGenerator from './generators/static.js';
+import HTMLGenerator from './generators/html.js';
+import RSSGenerator from './generators/rss.js';
+import TXTGenerator from './generators/txt.js';
+
+// Archiving Methods
+
+import GemlogArchiver from './archivers/gemlog.js';
+
+// Remote Handler
+
+import Remote from './remote.js';

 
 const internals = {
 
   // Promisified functions
 
 const internals = {
 
   // Promisified functions

-  ncp: promisify(ncp),
-

   exec: promisify(exec),
   exec: promisify(exec),

+

   debuglog: debuglog('blog'),
 
   // constants
 
   debuglog: debuglog('blog'),
 
   // constants
 

-  kAssetsDirectoryName: 'assets',
-  kIndexName: 'index.html',
-  kFileNotFoundError: 'ENOENT',
-  kMarkdownRe: /\.md$/i,
-  kRemoveCommand: 'rm -rf',
+  kGeminiRe: /\.gmi$/i,
+  kMetadataFilename: 'metadata.json',

 
   // Strings
 
   strings: {
 
   // Strings
 
   strings: {

-    markdownNotFound: 'Markdown file was not found in blog directory. Please update.'
+    geminiNotFound: 'Gemini file was not found in blog directory. Please update.'

   }
 };
 
   }
 };
 


@@ -36,10 +46,10 @@ const internals = {
  * updating posts, and handling the publishing.
  *
  * @class Blog
  * updating posts, and handling the publishing.
  *
  * @class Blog

- * @param {Potluck.tConfiguration} config the initialization options to
+ * @param {Blog.tConfiguration} config the initialization options to

  * extend the instance
  */
  * extend the instance
  */

-module.exports = class Blog {
+export default class Blog {

 
   constructor(config) {
 
 
   constructor(config) {
 


@@ -47,36 +57,47 @@ module.exports = class Blog {
   }
 
   /**
   }
 
   /**

-   * Shifts the blog posts, adds the passed path to slot 0, and
+   * Shifts the blog posts, adds the passed file to slot 0, and

    * generates files.
    *
    * @function add
    * @memberof Blog
    * generates files.
    *
    * @function add
    * @memberof Blog

-   * @param {string} postLocation the path to the directory containing
-   * the post structure
+   * @param {string} postLocation the path to the blog post file

    * @return {Promise<undefined>} empty promise, returns no value
    * @instance
    */
   async add(postLocation) {
 
    * @return {Promise<undefined>} empty promise, returns no value
    * @instance
    */
   async add(postLocation) {
 

+    await ensureDirectoryExists(this.postsDirectory);
+    try {
+      await this.syncDown();
+    }
+    catch {}
+

     await this._shift();
     await this._shift();

-    await this.update(postLocation);
+    const firstDirectory = join(this.postsDirectory, '0');
+    await rmIfExists(firstDirectory);
+    await ensureDirectoryExists(firstDirectory);
+    await this._update(postLocation);

   }
 
   /**
   }
 
   /**

-   * Adds the passed path to slot 0, and generates files.
+   * Update slot 0 with the passed gmi file, and generates files.

    *
    * @function update
    * @memberof Blog
    *
    * @function update
    * @memberof Blog

-   * @param {string} postLocation the path to the directory containing
-   * the post structure
+   * @param {string} postLocation the path to the blog post file

    * @return {Promise<undefined>} empty promise, returns no value
    * @instance
    */
   async update(postLocation) {
 
    * @return {Promise<undefined>} empty promise, returns no value
    * @instance
    */
   async update(postLocation) {
 

-    await this._copyPost(postLocation);
-    await this._generate();
+    try {
+      await this.syncDown();
+    }
+    catch {}
+
+    await this._update(postLocation);

   }
 
   /**
   }
 
   /**


@@ -87,47 +108,179 @@ module.exports = class Blog {
    * @return {Promise<undefined>} empty promise, returns no value
    * @instance
    */
    * @return {Promise<undefined>} empty promise, returns no value
    * @instance
    */

-  publish() {
+  async publish(host) {
+
+    internals.debuglog(`Publishing to ${host}`);
+    try {
+      await internals.exec('which rsync');
+    }
+    catch (err) {
+      console.error('Please install and configure rsync to publish.');
+    }
+
+    try {
+      internals.debuglog(`Copying ephemeral blog from ${this.blogOutputDirectory}`);
+      await internals.exec(`rsync -r ${this.blogOutputDirectory}/ ${host}`);
+    }
+    catch (err) {
+      console.error('Failed to publish');
+      console.error(err.stderr);
+    }

 
 

-    console.error('Publishing not yet implemented');
-    return Promise.resolve();
+    internals.debuglog('Finished publishing');

   }
 
   }
 

-  // Parses markdown for each page, copies assets and generates index.
+  /**
+   * Publishes the archive to a host using rsync. Currently assumes
+   * gemlog archive.
+   *
+   * @function publishArchive
+   * @memberof Blog
+   * @return {Promise<undefined>} empty promise, returns no value
+   * @instance
+   */
+  async publishArchive(host) {

 
 

-  async _generate() {
+    internals.debuglog(`Publishing archive to ${host}`);
+    try {
+      await internals.exec('which rsync');
+    }
+    catch (err) {
+      console.error('Please install rsync to publish the archive.');
+    }

 
 

-    const assetsTarget = join(this.staticDirectory, internals.kAssetsDirectoryName);
-    const indexTarget = join(this.staticDirectory, internals.kIndexName);
-    const indexLocation = join(this.templatesDirectory, internals.kIndexName);
-    const posts = [];
+    try {
+      internals.debuglog(`Copying archive from ${this.archiveOutputDirectory}`);
+      await internals.exec(`rsync -r ${this.archiveOutputDirectory}/ ${host}`);
+    }
+    catch (err) {
+      console.error('Failed to publish archive');
+      console.error(err.stderr);
+    }

 
 

-    internals.debuglog(`Removing ${assetsTarget}`);
-    await rmdir(assetsTarget, { recursive: true });
+    internals.debuglog('Finished publishing');
+  }

 
 

-    for (let i = 0; i < this.maxPosts; ++i) {
-      const sourcePath = join(this.postsDirectory, `${i}`);
+  /**
+   * Adds a remote
+   *
+   * @function addRemote
+   * @memberof Blog
+   * @return {Promise<undefined>} empty promise, returns no value
+   * @instance
+   */
+  async addRemote(remote) {

 
 

-      try {
-        await access(this.postsDirectory);
+    await ensureDirectoryExists(this.configDirectory);
+    await Remote.add(this.remoteConfig, remote);
+  }
+
+  /**
+   * Removes a remote
+   *
+   * @function removeRemote
+   * @memberof Blog
+   * @return {Promise<undefined>} empty promise, returns no value
+   * @instance
+   */
+  async removeRemote() {
+
+    await Remote.remove(this.remoteConfig);
+  }
+
+
+  /**
+   * Pulls the posts and archive from the remote
+   *
+   * @function syncDown
+   * @memberof Blog
+   * @return {Promise<undefined>} empty promise, returns no value
+   * @instance
+   */
+  async syncDown() {
+
+    internals.debuglog('Pulling remote state');
+    await ensureDirectoryExists(this.dataDirectory);
+    await Remote.syncDown(this.remoteConfig, this.dataDirectory);
+    internals.debuglog('Pulled remote state');
+  }
+
+  /**
+   * Pushes the posts and archive to the remote
+   *
+   * @function syncUp
+   * @memberof Blog
+   * @return {Promise<undefined>} empty promise, returns no value
+   * @instance
+   */
+  async syncUp() {
+
+    internals.debuglog('Pushing remote state');
+    await ensureDirectoryExists(this.dataDirectory);
+    await Remote.syncUp(this.remoteConfig, this.dataDirectory);
+    internals.debuglog('Pushed remote state');
+  }
+
+  // Adds the passed path to slot 0, and generates files.
+
+  async _update(postLocation) {
+
+    const metadata = await this._getMetadata();
+    await ensureDirectoryExists(this.postsDirectory);
+    await this._copyPost(postLocation);
+    await this._writeMetadata(metadata);
+
+    await this._archive(postLocation);
+
+    await this.generate();
+    try {
+      await this.syncUp();
+    }
+    catch {}
+  }
+
+
+  // Parses Gemini for each page, copies assets and generates index.

 
 

-        const assetsSource = join(sourcePath, internals.kAssetsDirectoryName);
-        const postContentPath = await this._findBlogContent(sourcePath);
+  async generate() {

 
 

-        internals.debuglog(`Copying ${assetsSource} to ${assetsTarget}`);
-        await internals.ncp(assetsSource, assetsTarget);
+    internals.debuglog('Generating output');

 
 

-        internals.debuglog(`Reading ${postContentPath}`);
-        const postContent = await readFile(postContentPath, { encoding: 'utf8' });
+    const posts = await this._readPosts();

 
 

-        internals.debuglog('Parsing markdown');
-        posts.push({
-          html: Marked(postContent),
-          id: i + 1
-        });
+    // Start from a clean slate.
+    await rmIfExists(this.blogOutputDirectory);
+    await ensureDirectoryExists(this.blogOutputDirectory);
+
+    // Run each generator
+    await StaticGenerator(this.staticDirectory, this.blogOutputDirectory, posts);
+    await HTMLGenerator(await this._templateDirectoryFor('index.html'), this.blogOutputDirectory, posts);
+    await RSSGenerator(await this._templateDirectoryFor('feed.xml'), this.blogOutputDirectory, posts);
+    await TXTGenerator(await this._templateDirectoryFor('index.txt'), this.blogOutputDirectory, posts);
+
+    // Start from a clean slate.
+    await rmIfExists(this.archiveOutputDirectory);
+    await ensureDirectoryExists(this.archiveOutputDirectory);
+    await ensureDirectoryExists(this.archiveDirectory);
+
+    // Run each archiver
+    await GemlogArchiver(await this._templateDirectoryFor('index.gmi'), this.archiveDirectory, this.archiveOutputDirectory);
+    // TODO: GopherArchiver
+  }
+
+  // Reads the posts into an array
+
+  async _readPosts() {
+
+    internals.debuglog('Reading posts');
+    const posts = [];
+
+    for (let i = 0; i < this.maxPosts; ++i) {
+      try {
+        posts.push(await this._readPost(i));

       }
       catch (error) {
       }
       catch (error) {

-        if (error.code === internals.kFileNotFoundError) {
+        if (error.code === kFileNotFoundError) {

           internals.debuglog(`Skipping ${i}`);
           continue;
         }
           internals.debuglog(`Skipping ${i}`);
           continue;
         }


@@ -136,35 +289,54 @@ module.exports = class Blog {
       }
     }
 
       }
     }
 

-    internals.debuglog(`Reading ${indexLocation}`);
-    const indexTemplate = await readFile(indexLocation, { encoding: 'utf8' });
+    return posts;
+  }
+
+  // Reads an individual post
+
+  async _readPost(index = 0) {
+
+    const postSourcePath = join(this.postsDirectory, `${index}`);
+
+    internals.debuglog(`Reading ${postSourcePath}`);
+
+    await access(postSourcePath);

 
 

-    internals.debuglog('Generating HTML');
-    const indexHtml = template(indexTemplate)({ posts });
-    await writeFile(indexTarget, indexHtml);
+    const metadata = await this._getMetadata(index);
+
+    const postContentPath = await this._findBlogContent(postSourcePath);
+    internals.debuglog(`Reading ${postContentPath}`);
+    const postContent = await readFile(postContentPath, { encoding: 'utf8' });
+
+    internals.debuglog('Parsing Gemini');
+    return {
+      ...metadata,
+      location: postSourcePath,
+      index,
+      html: RenderGemini(ParseGemini(postContent)),
+      raw: postContent
+    };

   }
 
   // Shift the posts, delete any remainder.
 
   async _shift() {
 
   }
 
   // Shift the posts, delete any remainder.
 
   async _shift() {
 

-    await this._ensurePostsDirectoryExists();

 
 

-    for (let i = this.maxPosts - 1; i > 0; --i) {
+    for (let i = this.maxPosts - 1; i >= 1; --i) {

       const targetPath = join(this.postsDirectory, `${i}`);
       const sourcePath = join(this.postsDirectory, `${i - 1}`);
 
       try {
       const targetPath = join(this.postsDirectory, `${i}`);
       const sourcePath = join(this.postsDirectory, `${i - 1}`);
 
       try {

-        await access(sourcePath);
-
-        internals.debuglog(`Removing ${targetPath}`);
-        await rmdir(targetPath, { recursive: true });
+        internals.debuglog(`Archiving ${targetPath}`);
+        await rmIfExists(targetPath);
+        await access(sourcePath); // check the source path

 
         internals.debuglog(`Shifting blog post ${sourcePath} to ${targetPath}`);
 
         internals.debuglog(`Shifting blog post ${sourcePath} to ${targetPath}`);

-        await internals.ncp(sourcePath, targetPath);
+        await cp(sourcePath, targetPath, { recursive: true });

       }
       catch (error) {
       }
       catch (error) {

-        if (error.code === internals.kFileNotFoundError) {
+        if (error.code === kFileNotFoundError) {

           internals.debuglog(`Skipping ${sourcePath}: Does not exist.`);
           continue;
         }
           internals.debuglog(`Skipping ${sourcePath}: Does not exist.`);
           continue;
         }


@@ -174,55 +346,103 @@ module.exports = class Blog {
     }
   }
 
     }
   }
 

-  // Copies a post directory to the latest slot.
+  // Moves older posts to the archive

 
 

-  async _copyPost(postLocation) {
+  async _archive() {

 
 

-    await this._ensurePostsDirectoryExists();
+    internals.debuglog('Archiving post');
+    const post = await this._readPost(0);
+    await ensureDirectoryExists(this.archiveDirectory);

 
 

-    const targetPath = join(this.postsDirectory, '0');
+    const targetPath = join(this.archiveDirectory, post.id);

 
     internals.debuglog(`Removing ${targetPath}`);
 
     internals.debuglog(`Removing ${targetPath}`);

-    await rmdir(targetPath, { recursive: true });
-
-    internals.debuglog(`Adding ${postLocation} to ${targetPath}`);
-    await internals.ncp(postLocation, targetPath);
+    await rmIfExists(targetPath);
+    internals.debuglog(`Adding ${post.location} to ${targetPath}`);
+    await ensureDirectoryExists(targetPath);
+    await cp(post.location, targetPath, { recursive: true });
+    internals.debuglog(`Added ${post.location} to ${targetPath}`);

   }
 
   }
 

-  // Ensures the posts directory exists.
+  // Attempts to read existing metadata. Otherwise generates new set.
+
+  async _getMetadata(index = 0) {

 
 

-  async _ensurePostsDirectoryExists() {
+    const metadataTarget = join(this.postsDirectory, String(index), internals.kMetadataFilename);

 
 

-    internals.debuglog(`Checking if ${this.postsDirectory} exists.`);

     try {
     try {

-      await access(this.postsDirectory);
+      internals.debuglog(`Looking for metadata at ${metadataTarget}`);
+      return JSON.parse(await readFile(metadataTarget, { encoding: 'utf8' }));

     }
     }

-    catch (error) {
-      if (error.code === internals.kFileNotFoundError) {
-        internals.debuglog('Creating posts directory');
-        await mkdir(this.postsDirectory);
-        return;
-      }
-
-      throw error;
+    catch (e) {
+      internals.debuglog(`Metadata not found or unreadable. Generating new set.`);
+      const createdOn = Date.now();
+      const metadata = {
+        id: String(createdOn),
+        createdOn
+      };
+
+      return metadata;

     }
   }
 
     }
   }
 

-  // Looks for a `.md` file in the blog directory, and returns the path
+  // Writes metadata. Assumes post 0 since it only gets written
+  // on create
+
+  async _writeMetadata(metadata) {
+
+    const metadataTarget = join(this.postsDirectory, '0', internals.kMetadataFilename);
+    internals.debuglog(`Writing ${metadataTarget}`);
+    await writeFile(metadataTarget, JSON.stringify(metadata, null, 2));
+  }
+
+  // Copies a post file to the latest slot.
+
+  async _copyPost(postLocation) {
+
+    internals.debuglog(`Copying ${postLocation}`);
+    const targetPath = join(this.postsDirectory, '0');
+    const postName = basename(postLocation);
+    const targetPost = join(targetPath, postName);
+
+    await rmIfExists(targetPath);
+    await ensureDirectoryExists(targetPath);
+    await cp(postLocation, targetPost, { recursive: true });
+    internals.debuglog(`Added ${postLocation} to ${targetPath}`);
+  }
+
+  // Looks for a `.gmi` file in the blog directory, and returns the path

 
   async _findBlogContent(directory) {
 
     const entries = await readdir(directory);
 
 
   async _findBlogContent(directory) {
 
     const entries = await readdir(directory);
 

-    const markdownEntries = entries
-      .filter((entry) => internals.kMarkdownRe.test(entry))
+    const geminiEntries = entries
+      .filter((entry) => internals.kGeminiRe.test(entry))

       .map((entry) => join(directory, entry));
 
       .map((entry) => join(directory, entry));
 

-    if (markdownEntries.length > 0) {
-      internals.debuglog(`Found markdown file: ${markdownEntries[0]}`);
-      return markdownEntries[0];
+    if (geminiEntries.length > 0) {
+      internals.debuglog(`Found gemini file: ${geminiEntries[0]}`);
+      return geminiEntries[0];

     }
 
     }
 

-    throw new Error(internals.strings.markdownNotFound);
+    throw new Error(internals.strings.geminiNotFound);

   }
   }

-};
+
+  // Gets the template directory for a given template.
+  async _templateDirectoryFor(template) {
+
+    try {
+      await access(join(this.templatesDirectory, template));
+      return this.templatesDirectory;
+    }
+    catch (error) {
+      if (error.code === kFileNotFoundError) {
+        internals.debuglog(`No custom template for ${template}`);
+        return this.defaultTemplatesDirectory;
+      }
+
+      throw error;
+    }
+  }
+}