From 5f4794df3a876524da2d080c08aafaf6c3c7e6b9 Mon Sep 17 00:00:00 2001
From: Braulio Bhavamitra <braulio@eita.org.br>
Date: Sun, 14 Jun 2015 16:53:27 -0300
Subject: [PATCH] Add infinite pagination js library

---
 public/javascripts/application.js |  1 +
 public/javascripts/pagination.js  | 59 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 60 insertions(+), 0 deletions(-)
 create mode 100644 public/javascripts/pagination.js

diff --git a/public/javascripts/application.js b/public/javascripts/application.js
index 1c53182..eff0920 100644
--- a/public/javascripts/application.js
+++ b/public/javascripts/application.js
@@ -23,6 +23,7 @@
 *= require_self
 *= require modal.js
 *= require loading-overlay.js
+*= require pagination.js
 * views speficics
 *= require add-and-join.js
 *= require report-abuse.js
diff --git a/public/javascripts/pagination.js b/public/javascripts/pagination.js
new file mode 100644
index 0000000..d385d5d
--- /dev/null
+++ b/public/javascripts/pagination.js
@@ -0,0 +1,59 @@
+
+pagination = {
+  loading: false,
+
+  showMore: function(newPagination, appendFunction) {
+    if (newPagination) {
+      jQuery('.pagination').replaceWith(newPagination);
+      jQuery('.pagination').addClass('infinite-scroll');
+    } else
+      jQuery('.pagination').remove();
+
+    appendFunction();
+  },
+
+  click: function(callback) {
+    jQuery(document).on('click', '.pagination a', function(e) {
+      e.preventDefault();
+      if (callback)
+        callback(e, this)
+      else {
+        // what to have as default?
+      }
+    });
+  },
+
+  // inspired by http://stackoverflow.com/questions/13555101/infinite-scroll-and-will-paginate-appending-the-next-page-of-items-multiple-ti
+  infiniteScroll: function(text, options) {
+    options = options || {};
+
+    jQuery(function() {
+      jQuery('.pagination').addClass('infinite-scroll');
+    });
+
+    jQuery(window).scroll(function () {
+      // Bail out right away if we're busy loading the next chunk.
+      if (pagination.loading)
+        return;
+
+      var url = jQuery('.pagination .next_page').attr('href')
+      if (url && jQuery(window).scrollTop() > (jQuery('.pagination').offset().top - jQuery(window).height() - 50)) {
+
+        jQuery('.pagination').html(
+          jQuery('<div class=loading>').text(text)
+        );
+
+        pagination.loading = true
+
+        if (options.load)
+          // don't forget to set pagination.loading to false!
+          options.load(url)
+        else
+          jQuery.getScript(url).always(function() {
+            pagination.loading = false
+          });
+      }
+    });
+  },
+
+};
--
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