git.r.bdr.sh - rbdr/blog/blob - bin/blog.js

   1 #!/usr/bin/env node
   2 'use strict';
   3
   4 const Package = require('../package.json');
   5 const Config = require('../config/config');
   6 const Blog = require('..');
   7 const Minimist = require('minimist');
   8
   9 const internals = {
  10   blog: new Blog(Config),
  11   expectedKeys: ['add',  'generate', 'update', 'publish', 'version'],
  12
  13   // Application entry point. Reads arguments and calls the
  14   // corresponding method from the blog lib
  15
  16   async main() {
  17
  18     try {
  19       const parsedArguments = this._parseArguments();
  20
  21       for (const argument in parsedArguments) {
  22         if (parsedArguments.hasOwnProperty(argument)) {
  23
  24           const value = parsedArguments[argument];
  25
  26           if (argument === 'version') {
  27             console.log(Package.version);
  28             return;
  29           }
  30
  31           if (argument === 'add') {
  32             await internals.blog.add(value);
  33             return;
  34           }
  35
  36           if (argument === 'update') {
  37             await internals.blog.update(value);
  38             return;
  39           }
  40
  41           if (argument === 'generate') {
  42             await internals.blog.generate();
  43             return;
  44           }
  45
  46           if (argument === 'publish') {
  47             await internals.blog.publish(value);
  48             return;
  49           }
  50         }
  51       }
  52
  53       console.log('Not yet implemented');
  54     }
  55     catch (err) {
  56       console.error(err.message || err);
  57       this._printUsage();
  58       process.exit(1);
  59     }
  60   },
  61
  62   // Parses arguments and returns them if valid. otherwise Throws
  63
  64   _parseArguments() {
  65
  66     const parsedArguments = Minimist(process.argv.slice(2));
  67
  68     if (!this._areArgumentsValid(parsedArguments)) {
  69       throw new Error(internals.strings.invalidArguments);
  70     }
  71
  72     return parsedArguments;
  73   },
  74
  75   // Checks if the arguments are valid, returns a boolean value.
  76
  77   _areArgumentsValid(parsedArguments) {
  78
  79     const argumentKeys = Object.keys(parsedArguments);
  80
  81     return argumentKeys.some((key) => internals.expectedKeys.indexOf(key) >= 0);
  82   },
  83
  84   // Prints the usage to stderr
  85
  86   _printUsage() {
  87
  88     console.error('\nUsage:\n');
  89     console.error('blog --add path/to/blog_post\t\t(creates new blog post)');
  90     console.error('blog --update path/to/blog_post\t\t(updates latest blog post)');
  91     console.error('blog --generate \t\t\t(generates the blog assets)');
  92     console.error('blog --publish <bucket> \t\t\t\t(publishes the blog to an S3 bucket)');
  93     console.error('blog --version \t\t\t\t(print the version)');
  94   }
  95 };
  96
  97 // Add the strings, added after declaration so they can consume the
  98 // internals object.
  99
 100 internals.strings = {
 101   invalidArguments: `Invalid Arguments, expecting one of: ${internals.expectedKeys.join(', ')}`
 102 };
 103
 104
 105
 106 internals.main();