From 05cf086766396745219582951f9b792ac5ed2bfb Mon Sep 17 00:00:00 2001
From: Eugen Rochko <eugen@zeonfederated.com>
Date: Wed, 22 Mar 2017 02:32:27 +0100
Subject: [PATCH] New API method: /api/v1/search Returns accounts, statuses,
 hashtags arrays

---
 app/controllers/api/v1/accounts_controller.rb |  2 +-
 app/controllers/api/v1/search_controller.rb   |  9 +++++++
 app/models/account.rb                         |  4 +--
 app/models/tag.rb                             | 19 ++++++++++++++
 app/services/account_search_service.rb        | 26 +++++++++++++++++++
 app/services/fetch_remote_resource_service.rb | 18 +++++++++++++
 app/services/search_service.rb                | 23 +++++++---------
 app/views/api/v1/search/index.rabl            | 13 ++++++++++
 config/routes.rb                              |  2 ++
 9 files changed, 99 insertions(+), 17 deletions(-)
 create mode 100644 app/controllers/api/v1/search_controller.rb
 create mode 100644 app/services/account_search_service.rb
 create mode 100644 app/services/fetch_remote_resource_service.rb
 create mode 100644 app/views/api/v1/search/index.rabl

diff --git a/app/controllers/api/v1/accounts_controller.rb b/app/controllers/api/v1/accounts_controller.rb
index 51c94895..f07450eb 100644
--- a/app/controllers/api/v1/accounts_controller.rb
+++ b/app/controllers/api/v1/accounts_controller.rb
@@ -115,7 +115,7 @@ class Api::V1::AccountsController < ApiController
   end
 
   def search
-    @accounts = SearchService.new.call(params[:q], limit_param(DEFAULT_ACCOUNTS_LIMIT), params[:resolve] == 'true', current_account)
+    @accounts = AccountSearchService.new.call(params[:q], limit_param(DEFAULT_ACCOUNTS_LIMIT), params[:resolve] == 'true', current_account)
 
     set_account_counters_maps(@accounts) unless @accounts.nil?
 
diff --git a/app/controllers/api/v1/search_controller.rb b/app/controllers/api/v1/search_controller.rb
new file mode 100644
index 00000000..6b129245
--- /dev/null
+++ b/app/controllers/api/v1/search_controller.rb
@@ -0,0 +1,9 @@
+# frozen_string_literal: true
+
+class Api::V1::SearchController < ApiController
+  respond_to :json
+
+  def index
+    @search = OpenStruct.new(SearchService.new.call(params[:q], 5, params[:resolve] == 'true', current_account))
+  end
+end
diff --git a/app/models/account.rb b/app/models/account.rb
index aa0af563..c3562081 100644
--- a/app/models/account.rb
+++ b/app/models/account.rb
@@ -222,8 +222,8 @@ SQL
     end
 
     def search_for(terms, limit = 10)
-      textsearch  = '(setweight(to_tsvector(\'simple\', accounts.display_name), \'A\') || setweight(to_tsvector(\'simple\', accounts.username), \'B\') || setweight(to_tsvector(\'simple\', coalesce(accounts.domain, \'\')), \'C\'))'
-      query       = 'to_tsquery(\'simple\', \'\'\' \' || ? || \' \'\'\' || \':*\')'
+      textsearch = '(setweight(to_tsvector(\'simple\', accounts.display_name), \'A\') || setweight(to_tsvector(\'simple\', accounts.username), \'B\') || setweight(to_tsvector(\'simple\', coalesce(accounts.domain, \'\')), \'C\'))'
+      query      = 'to_tsquery(\'simple\', \'\'\' \' || ? || \' \'\'\' || \':*\')'
 
       sql = <<SQL
         SELECT
diff --git a/app/models/tag.rb b/app/models/tag.rb
index 0d2fe43b..e2ad8e4d 100644
--- a/app/models/tag.rb
+++ b/app/models/tag.rb
@@ -10,4 +10,23 @@ class Tag < ApplicationRecord
   def to_param
     name
   end
+
+  class << self
+    def search_for(terms, limit = 5)
+      textsearch = 'to_tsvector(\'simple\', tags.name)'
+      query      = 'to_tsquery(\'simple\', \'\'\' \' || ? || \' \'\'\' || \':*\')'
+
+      sql = <<SQL
+        SELECT
+          tags.*,
+          ts_rank_cd(#{textsearch}, #{query}) AS rank
+        FROM tags
+        WHERE #{query} @@ #{textsearch}
+        ORDER BY rank DESC
+        LIMIT ?
+SQL
+
+      Tag.find_by_sql([sql, terms, terms, limit])
+    end
+  end
 end
diff --git a/app/services/account_search_service.rb b/app/services/account_search_service.rb
new file mode 100644
index 00000000..f55439dc
--- /dev/null
+++ b/app/services/account_search_service.rb
@@ -0,0 +1,26 @@
+# frozen_string_literal: true
+
+class AccountSearchService < BaseService
+  def call(query, limit, resolve = false, account = nil)
+    return [] if query.blank? || query.start_with?('#')
+
+    username, domain = query.gsub(/\A@/, '').split('@')
+    domain = nil if TagManager.instance.local_domain?(domain)
+
+    if domain.nil?
+      exact_match = Account.find_local(username)
+      results     = account.nil? ? Account.search_for(username, limit) : Account.advanced_search_for(username, account, limit)
+    else
+      exact_match = Account.find_remote(username, domain)
+      results     = account.nil? ? Account.search_for("#{username} #{domain}", limit) : Account.advanced_search_for("#{username} #{domain}", account, limit)
+    end
+
+    results = [exact_match] + results.reject { |a| a.id == exact_match.id } if exact_match
+
+    if resolve && !exact_match && !domain.nil?
+      results = [FollowRemoteAccountService.new.call("#{username}@#{domain}")]
+    end
+
+    results
+  end
+end
diff --git a/app/services/fetch_remote_resource_service.rb b/app/services/fetch_remote_resource_service.rb
new file mode 100644
index 00000000..80aa7436
--- /dev/null
+++ b/app/services/fetch_remote_resource_service.rb
@@ -0,0 +1,18 @@
+# frozen_string_literal: true
+
+class FetchRemoteResourceService < BaseService
+  def call(url)
+    atom_url, body = FetchAtomService.new.call(url)
+
+    return nil if atom_url.nil?
+
+    xml = Nokogiri::XML(body)
+    xml.encoding = 'utf-8'
+
+    if xml.root.name == 'feed'
+      FetchRemoteAccountService.new.call(atom_url)
+    elsif xml.root.name == 'entry'
+      FetchRemoteStatusService.new.call(atom_url)
+    end
+  end
+end
diff --git a/app/services/search_service.rb b/app/services/search_service.rb
index 19fc1697..159c0371 100644
--- a/app/services/search_service.rb
+++ b/app/services/search_service.rb
@@ -2,23 +2,18 @@
 
 class SearchService < BaseService
   def call(query, limit, resolve = false, account = nil)
-    return if query.blank? || query.start_with?('#')
+    return if query.blank?
 
-    username, domain = query.gsub(/\A@/, '').split('@')
-    domain = nil if TagManager.instance.local_domain?(domain)
+    results = { accounts: [], hashtags: [], statuses: [] }
 
-    if domain.nil?
-      exact_match = Account.find_local(username)
-      results     = account.nil? ? Account.search_for(username, limit) : Account.advanced_search_for(username, account, limit)
+    if query =~ /\Ahttps?:\/\//
+      resource = FetchRemoteResourceService.new.call(query)
+
+      results[:accounts] << resource if resource.is_a?(Account)
+      results[:statuses] << resource if resource.is_a?(Status)
     else
-      exact_match = Account.find_remote(username, domain)
-      results     = account.nil? ? Account.search_for("#{username} #{domain}", limit) : Account.advanced_search_for("#{username} #{domain}", account, limit)
-    end
-
-    results = [exact_match] + results.reject { |a| a.id == exact_match.id } if exact_match
-
-    if resolve && !exact_match && !domain.nil?
-      results = [FollowRemoteAccountService.new.call("#{username}@#{domain}")]
+      results[:accounts] = AccountSearchService.new.call(query, limit, resolve, account)
+      results[:hashtags] = Tag.search_for(query.gsub(/\A#/, ''), limit) unless query.start_with?('@')
     end
 
     results
diff --git a/app/views/api/v1/search/index.rabl b/app/views/api/v1/search/index.rabl
new file mode 100644
index 00000000..d10ac9e0
--- /dev/null
+++ b/app/views/api/v1/search/index.rabl
@@ -0,0 +1,13 @@
+object @search
+
+child accounts: :accounts do
+  extends 'api/v1/accounts/show'
+end
+
+node(:hashtags) do |search|
+  search.hashtags.map(&:name)
+end
+
+child statuses: :statuses do
+  extends 'api/v1/statuses/show'
+end
diff --git a/config/routes.rb b/config/routes.rb
index ea766e1b..b3f623c0 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -129,6 +129,8 @@ Rails.application.routes.draw do
       get '/timelines/public',   to: 'timelines#public', as: :public_timeline
       get '/timelines/tag/:id',  to: 'timelines#tag', as: :hashtag_timeline
 
+      get '/search', to: 'search#index', as: :search
+
       resources :follows,    only: [:create]
       resources :media,      only: [:create]
       resources :apps,       only: [:create]