Initial commit

.editorconfig

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+root = true
+
+[*]
+charset = utf-8
+indent_style = space
+indent_size = 2
+end_of_line = lf
+insert_final_newline = true
+trim_trailing_whitespace = true

.gitignore

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+vendor
+.env

.rubocop.yml

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+inherit_from: .rubocop_todo.yml
+
+AllCops:
+  TargetRubyVersion: 2.5

.rubocop_todo.yml

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+# This configuration was generated by
+# `rubocop --auto-gen-config`
+# on 2018-06-01 00:51:49 +0530 using RuboCop version 0.56.0.
+# The point is for the user to remove these configuration records
+# one by one as the offenses are removed from the code base.
+# Note that changes in the inspected code, or installation of new
+# versions of RuboCop, may require this file to be generated again.
+
+# Offense count: 1
+Metrics/AbcSize:
+  Max: 24
+
+# Offense count: 2
+# Configuration parameters: CountComments.
+Metrics/MethodLength:
+  Max: 14
+
+# Offense count: 2
+Style/Documentation:
+  Exclude:
+    - 'spec/**/*'
+    - 'test/**/*'
+    - 'app.rb'
+    - 'opml.rb'
+
+# Offense count: 2
+# Configuration parameters: AllowHeredoc, AllowURI, URISchemes, IgnoreCopDirectives, IgnoredPatterns.
+# URISchemes: http, https
+Metrics/LineLength:
+  Max: 87

Gemfile

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+# frozen_string_literal: true
+
+source 'https://rubygems.org'
+
+gem 'nokogiri', '~> 1.8'
+gem 'octokit', '~> 4.0'
+gem 'redis', '~> 4.0'
+gem 'sinatra', '~> 2.0'
+gem 'sinatra-contrib', '~> 2.0'
+gem 'dotenv'

Gemfile.lock

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+GEM
+  remote: https://rubygems.org/
+  specs:
+    addressable (2.5.2)
+      public_suffix (>= 2.0.2, < 4.0)
+    backports (3.11.3)
+    dotenv (2.4.0)
+    faraday (0.15.2)
+      multipart-post (>= 1.2, < 3)
+    mini_portile2 (2.3.0)
+    multi_json (1.13.1)
+    multipart-post (2.0.0)
+    mustermann (1.0.2)
+    nokogiri (1.8.2)
+      mini_portile2 (~> 2.3.0)
+    octokit (4.9.0)
+      sawyer (~> 0.8.0, >= 0.5.3)
+    public_suffix (3.0.2)
+    rack (2.0.5)
+    rack-protection (2.0.1)
+      rack
+    redis (4.0.1)
+    sawyer (0.8.1)
+      addressable (>= 2.3.5, < 2.6)
+      faraday (~> 0.8, < 1.0)
+    sinatra (2.0.1)
+      mustermann (~> 1.0)
+      rack (~> 2.0)
+      rack-protection (= 2.0.1)
+      tilt (~> 2.0)
+    sinatra-contrib (2.0.1)
+      backports (>= 2.0)
+      multi_json
+      mustermann (~> 1.0)
+      rack-protection (= 2.0.1)
+      sinatra (= 2.0.1)
+      tilt (>= 1.3, < 3)
+    tilt (2.0.8)
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  dotenv
+  nokogiri (~> 1.8)
+  octokit (~> 4.0)
+  redis (~> 4.0)
+  sinatra (~> 2.0)
+  sinatra-contrib (~> 2.0)
+
+BUNDLED WITH
+   1.16.2

app.rb

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+# frozen_string_literal: true
+require 'dotenv/load'
+require 'sinatra/base'
+require 'sinatra/reloader'
+require 'octokit'
+require 'redis'
+require 'json'
+require './opml'
+
+Octokit.auto_paginate = true
+
+class MyApp < Sinatra::Base
+  configure :development do
+    register Sinatra::Reloader
+    also_reload 'opml.rb'
+  end
+  configure do
+    set :r, Redis.new
+    set :client, Octokit::Client.new(
+      client_id: ENV.fetch('GITHUB_CLIENT_ID'),
+      client_secret: ENV.fetch('GITHUB_CLIENT_SECRET'),
+      per_page: 100,
+      auto_traversal: true,
+      auto_paginate: true
+    )
+  end
+
+  def get_starred_repos_from_cache(user)
+    from_cache = settings.r.get "#{user}.repos"
+    if from_cache
+      time = settings.r.get "#{user}.repos.time" || Time.now.to_i
+      return [JSON.parse(from_cache), time]
+    end
+    repos = []
+    starred = settings.client.starred(user)
+
+    starred.each do |repo|
+      repos.push repo[:full_name]
+    end
+
+    time = Time.now.to_i
+    settings.r.set "#{user}.repos", repos
+    settings.r.set "#{user}.repos.time", time
+    [repos, time]
+  end
+
+  get '/github/:user/starred.opml' do
+    user = params[:user]
+    repos, time = get_starred_repos_from_cache(user)
+    opml = OPML.new do
+      @title = "Releases: #{user}/starred"
+      @date_created = Time.new(time.to_i).rfc822
+      @date_modified = Time.now.rfc822
+      @owner_name = user
+    end
+    repos.each do |r|
+      title = "Release notes from #{r}"
+      html_url = "https://github.com/#{r}/releases"
+      rss_url  = "#{html_url}.atom"
+      opml.add_outline(
+        text: title, description: "#{r}/releases", html_url: html_url,
+        xml_url: rss_url, title: title,
+        type: 'rss', version: 'RSS2'
+      )
+    end
+
+    filename = "#{user}-starred-releases.opml"
+
+    response.headers['Content-Disposition'] = "attachment; filename=#{filename};"
+    response.headers['Content-Type'] = 'application/octet-stream'
+    response.headers['Content-Transfer-Encoding'] = 'binary'
+
+    opml.xml
+  end
+end

config.ru

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+# frozen_string_literal: true
+
+require './app'
+run MyApp

opml.rb

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+# frozen_string_literal: true
+
+require 'nokogiri'
+
+class OPML
+  PROPERTIES = %w[title date_created date_modified
+                  owner_name owner_email docs].freeze
+
+  attr_accessor :title, :date_created, :date_modified, :owner_name, :owner_email, :docs
+
+  def initialize(&block)
+    instance_eval(&block)
+    @docs = 'http://dev.opml.org/spec2.html'
+    @outlines = []
+  end
+
+  def camel_case(str)
+    str.downcase.split('_').each_with_index.map do |v, i|
+      i.zero? ? v : v.capitalize
+    end.join
+  end
+
+  def add_outline(params)
+    params = Hash[params.map { |k, v| [camel_case(k.to_s), v] }]
+    @outlines.push params
+  end
+
+  def add_note_with_params(xml, attrs)
+    attrs.each do |attr|
+      val = send(attr.to_sym)
+      key = camel_case(attr).to_sym
+      xml.send(key, val) if val
+    end
+  end
+
+  def xml
+    Nokogiri::XML::Builder.new(encoding: 'UTF-8') do |xml|
+      xml.opml(version: '2.0') do
+        xml.head do
+          add_note_with_params xml, PROPERTIES
+        end
+
+        xml.body do
+          xml.outline text: 'GitHub Releases' do
+            @outlines.each do |outline|
+              xml.outline outline
+            end
+          end
+        end
+      end
+    end.to_xml
+  end
+end