add mock recommender service for development, add user-context recommended posts

script/mock_services/README.md

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+These are mocked services to be used for development purposes.
+
+- danbooru: port 3000
+- recommender: port 3001
+- iqdbs: port 3002
+- reportbooru: port 3003
+- listbooru: port 3004

script/mock_services/iqdbs.rb

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+require 'sinatra'
+require 'json'
+require_relative './mock_service_helper'
+
+set :port, 3002
+
+configure do
+  POST_IDS = MockServiceHelper.fetch_post_ids()
+end
+
+get '/similar' do
+  content_type :json
+  POST_IDS[0..10].map {|x| {post_id: x}}.to_json
+end

script/mock_services/listbooru.rb

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+require 'sinatra'
+require 'json'
+
+set :port, 3004
+
+post '/v2/search' do
+  # todo
+end

script/mock_services/mock_service_helper.rb

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+require 'socket'
+require 'timeout'
+require 'httparty'
+
+module MockServiceHelper
+  extend self
+
+  DANBOORU_PORT = 3000
+
+  def fetch_post_ids()
+    begin
+      s = TCPSocket.new("localhost", DANBOORU_PORT)
+      s.close
+    rescue Errno::ECONNREFUSED, Errno::EHOSTUNREACH
+      sleep 1
+      retry
+    end
+
+    json = HTTParty.get("http://localhost:#{DANBOORU_PORT}/posts.json?random=true&limit=10").body
+    return JSON.parse(json).map {|x| x["id"]}
+  end
+end

script/mock_services/recommender.rb

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+require 'sinatra'
+require 'json'
+require_relative './mock_service_helper'
+
+set :port, 3001
+
+configure do
+  POST_IDS = MockServiceHelper.fetch_post_ids()
+end
+
+get '/recommend/:user_id' do
+  content_type :json
+  POST_IDS[0..10].map {|x| [x, "1.000"]}.to_json
+end
+
+get '/similar/:post_id' do
+  content_type :json
+  POST_IDS[0..6].map {|x| [x, "1.000"]}.to_json  
+end

script/mock_services/reportbooru.rb

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+require 'sinatra'
+require 'json'
+
+set :port, 3003
+
+get '/missed_searches' do
+  content_type :text
+  return "abcdefg 10.0\nblahblahblah 20.0\n"
+end
+
+get '/post_searches/rank' do
+  content_type :json
+  return [["abc", 100], ["def", 200]].to_json
+end
+
+get '/reports/user_similarity' do
+  # todo
+end
+
+get '/reports/uploads' do
+  # todo
+end
+
+post '/post_views' do
+  # todo
+end