From 40eeac20216edcd7fd4e31926d5d690c29716bbd Mon Sep 17 00:00:00 2001
From: Andreas Haller <andreashaller@gmail.com>
Date: Mon, 27 Apr 2015 23:14:48 +0200
Subject: [PATCH] Add pagination via kaminari

---
 Gemfile                                  |  1 +
 Gemfile.lock                             |  4 ++++
 app/controllers/search_controller.rb     |  5 ++---
 app/views/kaminari/_first_page.html.slim |  3 +++
 app/views/kaminari/_gap.html.slim        |  2 ++
 app/views/kaminari/_last_page.html.slim  |  3 +++
 app/views/kaminari/_next_page.html.slim  |  4 ++++
 app/views/kaminari/_page.html.slim       |  4 ++++
 app/views/kaminari/_paginator.html.slim  | 12 ++++++++++++
 app/views/kaminari/_prev_page.html.slim  |  4 ++++
 app/views/search/index.html.slim         |  5 ++++-
 config/initializers/kaminari_config.rb   | 13 +++++++++++++
 lib/tasks/import_papers.rake             |  2 +-
 13 files changed, 57 insertions(+), 5 deletions(-)
 create mode 100644 app/views/kaminari/_first_page.html.slim
 create mode 100644 app/views/kaminari/_gap.html.slim
 create mode 100644 app/views/kaminari/_last_page.html.slim
 create mode 100644 app/views/kaminari/_next_page.html.slim
 create mode 100644 app/views/kaminari/_page.html.slim
 create mode 100644 app/views/kaminari/_paginator.html.slim
 create mode 100644 app/views/kaminari/_prev_page.html.slim
 create mode 100644 config/initializers/kaminari_config.rb

diff --git a/Gemfile b/Gemfile
index 16e0264..62b9861 100644
--- a/Gemfile
+++ b/Gemfile
@@ -5,6 +5,7 @@ source 'https://rubygems.org'
 gem 'rails'
 # Use sqlite3 as the database for Active Record
 gem 'sqlite3'
+gem 'kaminari'
 # Use SCSS for stylesheets
 gem 'sass-rails'
 # Use Uglifier as compressor for JavaScript assets
diff --git a/Gemfile.lock b/Gemfile.lock
index d16bc3c..7f306e6 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -81,6 +81,9 @@ GEM
       railties (>= 4.2.0)
       thor (>= 0.14, < 2.0)
     json (1.8.2)
+    kaminari (0.16.3)
+      actionpack (>= 3.0.0)
+      activesupport (>= 3.0.0)
     launchy (2.4.3)
       addressable (~> 2.3)
     loofah (2.0.1)
@@ -188,6 +191,7 @@ DEPENDENCIES
   elasticsearch-model
   foundation-rails
   jquery-rails
+  kaminari
   launchy
   omniauth
   omniauth-browserid
diff --git a/app/controllers/search_controller.rb b/app/controllers/search_controller.rb
index a66bc48..a15cd75 100644
--- a/app/controllers/search_controller.rb
+++ b/app/controllers/search_controller.rb
@@ -2,10 +2,9 @@ class SearchController < ApplicationController
   def index
     @show_search_result = params[:q].present?
     @papers = if @show_search_result
-      # TODO: Add pagination
-      Paper.search(params[:q]).records
+      Paper.search(params[:q]).page(params[:page]).results
     else
-      Paper.last(30)
+      Paper.order(published_at: :desc).page(params[:page])
     end
   end
 end
diff --git a/app/views/kaminari/_first_page.html.slim b/app/views/kaminari/_first_page.html.slim
new file mode 100644
index 0000000..8a6de84
--- /dev/null
+++ b/app/views/kaminari/_first_page.html.slim
@@ -0,0 +1,3 @@
+li
+  = link_to_unless(current_page.first?,
+                   raw(t 'views.pagination.first'), url, :remote => remote)
diff --git a/app/views/kaminari/_gap.html.slim b/app/views/kaminari/_gap.html.slim
new file mode 100644
index 0000000..cf67eac
--- /dev/null
+++ b/app/views/kaminari/_gap.html.slim
@@ -0,0 +1,2 @@
+li.unavailable
+  = link_to raw(t 'views.pagination.truncate'), '#'
diff --git a/app/views/kaminari/_last_page.html.slim b/app/views/kaminari/_last_page.html.slim
new file mode 100644
index 0000000..f8fd3f2
--- /dev/null
+++ b/app/views/kaminari/_last_page.html.slim
@@ -0,0 +1,3 @@
+li
+  = link_to_unless(current_page.last?,
+                   raw(t 'views.pagination.last'), url, { :remote => remote })
diff --git a/app/views/kaminari/_next_page.html.slim b/app/views/kaminari/_next_page.html.slim
new file mode 100644
index 0000000..cbc6e6e
--- /dev/null
+++ b/app/views/kaminari/_next_page.html.slim
@@ -0,0 +1,4 @@
+li
+  = link_to_unless(current_page.last?,
+                   raw(t 'views.pagination.next'),
+                   url, :rel => 'next', :remote => remote)
diff --git a/app/views/kaminari/_page.html.slim b/app/views/kaminari/_page.html.slim
new file mode 100644
index 0000000..254f922
--- /dev/null
+++ b/app/views/kaminari/_page.html.slim
@@ -0,0 +1,4 @@
+li{class="#{'current' if page.current?}"}
+  = link_to(page, page.current? ? '#' : url,
+           { :remote => remote,
+              :rel => page.next? ? 'next' : page.prev? ? 'prev' : nil })
diff --git a/app/views/kaminari/_paginator.html.slim b/app/views/kaminari/_paginator.html.slim
new file mode 100644
index 0000000..95af1fe
--- /dev/null
+++ b/app/views/kaminari/_paginator.html.slim
@@ -0,0 +1,12 @@
+= paginator.render do
+  .pagination-centered
+    ul.pagination
+      = first_page_tag unless current_page.first?
+      = prev_page_tag unless current_page.first?
+      - each_page do |page|
+        - if page.left_outer? || page.right_outer? || page.inside_window?
+          = page_tag page
+        - elsif !page.was_truncated?
+          = gap_tag
+      = next_page_tag unless current_page.last?
+      = last_page_tag unless current_page.last?
diff --git a/app/views/kaminari/_prev_page.html.slim b/app/views/kaminari/_prev_page.html.slim
new file mode 100644
index 0000000..c4a518d
--- /dev/null
+++ b/app/views/kaminari/_prev_page.html.slim
@@ -0,0 +1,4 @@
+li
+  = link_to_unless(current_page.first?,
+                   raw(t 'views.pagination.previous'),
+                   url, :rel => 'prev', :remote => remote)
diff --git a/app/views/search/index.html.slim b/app/views/search/index.html.slim
index 167ef9e..689649e 100644
--- a/app/views/search/index.html.slim
+++ b/app/views/search/index.html.slim
@@ -4,7 +4,7 @@ div
 .clearfix
   - if @show_search_result
     .left
-      | #{@papers.size} Treffer
+      | #{@papers.total} Treffer
     .right
       button.button. TODO: Suche Abbonieren
 div
@@ -18,3 +18,6 @@ div
         small = doc.published_at
         = link_to doc.url, target: '_blank' do
           div = doc.name
+
+div
+  = paginate @papers
diff --git a/config/initializers/kaminari_config.rb b/config/initializers/kaminari_config.rb
new file mode 100644
index 0000000..b1799b0
--- /dev/null
+++ b/config/initializers/kaminari_config.rb
@@ -0,0 +1,13 @@
+Kaminari.configure do |config|
+  # config.default_per_page = 25
+  # config.max_per_page = nil
+  # config.window = 4
+  # config.outer_window = 0
+  # config.left = 0
+  # config.right = 0
+  # config.page_method_name = :page
+  # config.param_name = :page
+end
+
+Kaminari::Hooks.init
+Elasticsearch::Model::Response::Response.__send__ :include, Elasticsearch::Model::Response::Pagination::Kaminari
diff --git a/lib/tasks/import_papers.rake b/lib/tasks/import_papers.rake
index 7283452..6ba6f13 100644
--- a/lib/tasks/import_papers.rake
+++ b/lib/tasks/import_papers.rake
@@ -4,7 +4,7 @@ namespace :import_papers do
   task :from_morph => :environment do |t, args|
     require 'open-uri'
     api_key = ENV['MORPH_API_KEY']
-    uri = URI.parse "https://api.morph.io/ahx/city_council_leipzig_recent_papers/data.json?key=#{api_key}&query=select%20*%20from%20%27data%27%20limit%2010"
+    uri = URI.parse "https://api.morph.io/ahx/city_council_leipzig_recent_papers/data.json?key=#{api_key}&query=select%20*%20from%20%27data%27"
     puts "Download files from #{uri}…"
     Paper.import_from_json(uri.read)
   end