Add more filters

Author: dejan

.gitignore

@@ -1,3 +1,4 @@
+/*.gem
 /.bundle/
 /.yardoc
 /Gemfile.lock

.rubocop.yml

@@ -0,0 +1,5 @@
+Metrics/MethodLength:
+  Enabled: false
+
+Metrics/LineLength:
+  Enabled: false

Rakefile

@@ -1,6 +1,8 @@
-require "bundler/gem_tasks"
-require "rspec/core/rake_task"
+require 'bundler/gem_tasks'
+require 'rspec/core/rake_task'
+require 'rubocop/rake_task'
 
 RSpec::Core::RakeTask.new(:spec)
+RuboCop::RakeTask.new
 
-task :default => :spec
+task default: [:rubocop, :spec]

auto_html-contrib.gemspec

@@ -1,33 +1,26 @@
 # coding: utf-8
-lib = File.expand_path('../lib', __FILE__)
-$LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
-require 'auto_html/contrib/version'
 
 Gem::Specification.new do |spec|
-  spec.name          = "auto_html-contrib"
-  spec.version       = AutoHtml::Contrib::VERSION
-  spec.authors       = ["Dejan Simic"]
-  spec.email         = ["[email protected]"]
+  spec.name          = 'auto_html-contrib'
+  spec.version       = '0.0.1'
+  spec.authors       = ['Dejan Simic']
+  spec.email         = ['[email protected]']
 
-  spec.summary       = %q{Filters for `auto_html` gem}
-  spec.description   = %q{Filters for `auto_html` gem}
-  spec.homepage      = "https://github.com/dejan/auto_html-contrib"
-  spec.license       = "MIT"
-
-  # Prevent pushing this gem to RubyGems.org by setting 'allowed_push_host', or
-  # delete this section to allow pushing this gem to any host.
-  if spec.respond_to?(:metadata)
-    spec.metadata['allowed_push_host'] = "TODO: Set to 'http://mygemserver.com'"
-  else
-    raise "RubyGems 2.0 or newer is required to protect against public gem pushes."
-  end
+  spec.summary       = 'Filters for `auto_html` gem'
+  spec.description   = 'Filters for `auto_html` gem'
+  spec.homepage      = 'https://github.com/dejan/auto_html-contrib'
+  spec.license       = 'MIT'
 
   spec.files         = `git ls-files -z`.split("\x0").reject { |f| f.match(%r{^(test|spec|features)/}) }
-  spec.bindir        = "exe"
+  spec.bindir        = 'exe'
   spec.executables   = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
-  spec.require_paths = ["lib"]
+  spec.require_paths = ['lib']
+
+  spec.add_dependency 'tag_helper', '~> 0.5'
 
-  spec.add_development_dependency "bundler", "~> 1.10"
-  spec.add_development_dependency "rake", "~> 10.0"
-  spec.add_development_dependency "rspec"
+  spec.add_development_dependency 'bundler', '~> 1.10'
+  spec.add_development_dependency 'rake', '~> 10.0'
+  spec.add_development_dependency 'rspec', '~> 3.3'
+  spec.add_development_dependency 'rubocop', '~> 0.33'
+  spec.add_development_dependency 'fakeweb', '~> 1.3'
 end

bin/console

@@ -1,7 +1,7 @@
 #!/usr/bin/env ruby
 
-require "bundler/setup"
-require "auto_html/contrib"
+require 'bundler/setup'
+require 'auto_html/contrib'
 
 # You can add fixtures and/or initialization code here to make experimenting
 # with your gem easier. You can also use a different console, if you like.
@@ -10,5 +10,5 @@ require "auto_html/contrib"
 # require "pry"
 # Pry.start
 
-require "irb"
+require 'irb'
 IRB.start

lib/auto_html.rb

@@ -0,0 +1,9 @@
+# Filters for AutoHtml
+module AutoHtml
+  autoload :Gist,         'auto_html/gist'
+  autoload :GoogleMaps,   'auto_html/google_maps'
+  autoload :Instagram,    'auto_html/instagram'
+  autoload :Vimeo,        'auto_html/vimeo'
+  autoload :YouTube,      'auto_html/youtube'
+  autoload :Twitter,      'auto_html/twitter'
+end

lib/auto_html/contrib.rb

@@ -0,0 +1,22 @@
+require 'tag_helper'
+
+module AutoHtml
+  # Gist filter
+  class Gist
+    include TagHelper
+
+    def call(text)
+      regex = %r{https?://gist\.github\.com/(\w+/)?(\d+)}
+      text.gsub(regex) do
+        gist_id = Regexp.last_match(2)
+        tag(:script, type: 'text/javascript', src: gist_url(gist_id)) { '' }
+      end
+    end
+
+    private
+
+    def gist_url(id)
+      "https://gist.github.com/#{id}.js"
+    end
+  end
+end

lib/auto_html/contrib/version.rb

@@ -0,0 +1,68 @@
+require 'tag_helper'
+
+module AutoHtml
+  # Google Maps filter
+  class GoogleMaps
+    include TagHelper
+
+    def initialize(width: 420, height: 315, type: :normal, zoom: 18, show_info: false)
+      @width = width
+      @height = height
+      @type = type
+      @zoom = zoom
+      @show_info = show_info
+    end
+
+    def call(text)
+      regex = %r{(https?)://maps\.google\.([a-z\.]+)/maps\?(.*)}
+      text.gsub(regex) do
+        country = Regexp.last_match(2)
+        path = "//maps.google.#{country}/maps"
+        query = Regexp.last_match(3)
+        link = link_tag(path, query)
+        iframe_tag(path, query) << tag(:br) << tag(:small) { link }
+      end
+    end
+
+    private
+
+    def iframe_tag(path, map_query)
+      params = ['f=q', 'source=s_q', map_query, 'output=embed'] + map_options
+      tag(
+        :iframe,
+        width: @width,
+        height: @height,
+        frameborder: 0,
+        scrolling: 'no',
+        marginheight: 0,
+        marginwidth: 0,
+        src: path + '?' + params.join('&amp;')) { '' }
+    end
+
+    def link_tag(path, map_query)
+      params = ['f=q', 'source=embed', map_query]
+      tag(
+        :a,
+        href: path + '?' + params.join('&amp;'),
+        style: 'color:#000;text-align:left') do
+          'View Larger Map'
+        end
+    end
+
+    def map_options
+      map_options = []
+      map_options << 'iwloc=near' if @show_info
+      map_options << map_types[@type]
+      map_options << "z=#{@zoom}"
+    end
+
+    def map_types
+      @map_types ||= {
+        normal: 't=m',
+        satellite: 't=k',
+        terrain: 't=p',
+        hibrid: 't=h'
+      }
+    end
+  end
+end

lib/auto_html/gist.rb

@@ -0,0 +1,32 @@
+require 'tag_helper'
+
+module AutoHtml
+  # Instagram filter
+  class Instagram
+    include TagHelper
+
+    def initialize(width: 616, height: 714)
+      @width = width
+      @height = height
+    end
+
+    def call(text)
+      text << '/' unless text.end_with?('/')
+      text.gsub(instagram_pattern) do
+        tag(
+          :iframe,
+          src: "#{text}embed",
+          height: @height,
+          width: @width,
+          frameborder: 0,
+          scrolling: 'no') { '' }
+      end
+    end
+
+    private
+
+    def instagram_pattern
+      @instagram_pattern ||= %r{https?:\/\/(www.)?instagr(am\.com|\.am)/p/.+}
+    end
+  end
+end

lib/auto_html/google_maps.rb

@@ -0,0 +1,25 @@
+require 'uri'
+require 'net/http'
+require 'json'
+
+module AutoHtml
+  # Twitter filter
+  class Twitter
+    def call(text)
+      text.gsub(twitter_pattern) do |match|
+        uri = URI('https://api.twitter.com/1/statuses/oembed.json')
+        uri.query = URI.encode_www_form(url: match)
+        http = Net::HTTP.new(uri.host, uri.port)
+        http.use_ssl = true
+        response = JSON.parse(http.get(uri.request_uri).body)
+        response['html']
+      end
+    end
+
+    private
+
+    def twitter_pattern
+      @twitter_pattern ||= %r{(?<!href=")https://twitter\.com(/#!)?/[A-Za-z0-9_]{1,15}/status(es)?/\d+}
+    end
+  end
+end

lib/auto_html/instagram.rb

@@ -0,0 +1,49 @@
+require 'tag_helper'
+
+module AutoHtml
+  # Vimeo filter
+  class Vimeo
+    include TagHelper
+
+    def initialize(width: 420, height: 315, allow_fullscreen: true)
+      @width = width
+      @height = height
+      @allow_fullscreen = allow_fullscreen
+    end
+
+    def call(text)
+      text.gsub(vimeo_pattern) do
+        vimeo_id = Regexp.last_match(2)
+        src = src_url(vimeo_id)
+        tag(:iframe, { src: src }.merge(iframe_attributes)) { '' }
+      end
+    end
+
+    private
+
+    def vimeo_pattern
+      @vimeo_pattern ||= %r{https?://(www.)?vimeo\.com/([A-Za-z0-9._%-]*)((\?|#)\S+)?}
+    end
+
+    def src_url(vimeo_id)
+      "//player.vimeo.com/video/#{vimeo_id}"
+    end
+
+    def iframe_attributes
+      {}.tap do |attrs|
+        attrs[:width] = @width
+        attrs[:height] = @height
+        attrs[:frameborder] = 0
+        attrs.merge!(fullscreen_attributes) if @allow_fullscreen
+      end
+    end
+
+    def fullscreen_attributes
+      {
+        webkitallowfullscreen: 'yes',
+        mozallowfullscreen: 'yes',
+        allowfullscreen: 'yes'
+      }
+    end
+  end
+end

lib/auto_html/twitter.rb

@@ -0,0 +1,49 @@
+require 'tag_helper'
+
+module AutoHtml
+  # YouTube filter
+  class YouTube
+    include TagHelper
+
+    def initialize(width: 420, height: 315)
+      @width = width
+      @height = height
+    end
+
+    def call(text)
+      text.gsub(youtube_pattern) do
+        youtube_id = Regexp.last_match(4)
+        tag(:div, class: 'video youtube') do
+          tag(:iframe, iframe_attributes(youtube_id)) { '' }
+        end
+      end
+    end
+
+    private
+
+    def youtube_pattern
+      @youtube_pattern ||=
+        %r{
+          (https?://)?
+          (www.)?
+          (
+            youtube\.com/watch\?v=|
+            youtu\.be/|
+            youtube\.com/watch\?feature=player_embedded&v=
+          )
+          ([A-Za-z0-9_-]*)(\&\S+)?(\?\S+)?
+        }x
+    end
+
+    def iframe_attributes(youtube_id)
+      src = "//www.youtube.com/embed/#{youtube_id}"
+      {
+        width: @width,
+        height: @height,
+        src: src,
+        frameborder: 0,
+        allowfullscreen: 'yes'
+      }
+    end
+  end
+end

lib/auto_html/vimeo.rb

@@ -0,0 +1,15 @@
+require 'spec_helper'
+
+RSpec.describe AutoHtml::Gist do
+  it 'converst gist URL to gist script tag' do
+    expect(subject.call('https://gist.github.com/171027')).to eq(
+      '<script type="text/javascript" src="https://gist.github.com/171027.js">'\
+      '</script>')
+  end
+
+  it 'converst gist URL with username to gist script tag' do
+    expect(subject.call('https://gist.github.com/toctan/654784')).to eq(
+      '<script type="text/javascript" src="https://gist.github.com/654784.js">'\
+      '</script>')
+  end
+end