serve-spm/lib/rules.js

SPM middleware for debug.

'use strict';

var debug = require('debug')('serve-spm:rules');
var join = require('path').join;
var relative = require('path').relative;
var util = require('./util');

/*
  Rules list

  every rule should return an object containing `path` if need matching

  - url: request url Object parsed by `url`
  - pkg: a father package
*/

module.exports = [

  // /$ -> index.html
  function(url, pkg) {
    if (/\/$/.test(url.pathname)) {
      debug('matching %s -> %s', url.pathname, 'index.html');
      return {
        path: join(pkg.dest, url.pathname, 'index.html')
      };
    }
  },

  // /$ -> index.htm
  function(url, pkg) {
    if (/\/$/.test(url.pathname)) {
      debug('matching %s -> %s', url.pathname, 'index.htm');
      return {
        path: join(pkg.dest, url.pathname, 'index.htm')
      };
    }
  },


  // ^/a.js -> a.js
  function(url, pkg) {
    return {
      path: join(pkg.dest, url.pathname)
    };
  },

  // ^/dist/{name}/{version}/a.js -> /a.js
  function(url, pkg) {
    var pathname = url.pathname;
    var prefix = '/dist/' + pkg.name + '/' + pkg.version;
    if (pathname.indexOf(prefix) === 0) {
      pathname = pathname.replace(prefix, '');
      debug('matching %s -> %s', url.pathname, pathname);
      return {
        path: join(pkg.dest, pathname)
      };
    }
  },

  // ^/{name}/{version}/a.js -> /dist/{name}/{version}/a.js
  function(url, pkg, rootPkg) {
    var pathname = join('dist', url.pathname);
    debug('matching %s -> %s', url.pathname, pathname);
    return {
      wrap: false,
      path: join(rootPkg.dest, pathname)
    };
  },

  // ^/{name}/{version}/a.js -> /a.js
  function(url, pkg) {
    var matched = util.matchNameVersion(url.pathname);
    if (matched && matched.name === pkg.name && matched.version === pkg.version) {
      debug('matching %s -> %s', url.pathname, matched.file);
      return {
        path: join(pkg.dest, matched.file)
      };
    }
  },

  // ^/{name}/{version}/a.js -> /spm_modules/{name}/{version}/a.js
  function(url, pkg) {
    var matched = util.matchNameVersion(url.pathname);
    if (!matched) return;

    var sub = pkg.getPackage(matched.name + '@' + matched.version);
    if (sub) {
      debug('matching %s -> %s', join(relative(pkg.dest ,sub.dest), matched.file));
      return {
        path: join(sub.dest, matched.file)
      };
    }
  }
];