From 49f8894f932cb93c328d13260fb9e773b39a1a6c Mon Sep 17 00:00:00 2001
From: Jason Skomorowski <jason@indexdata.com>
Date: Wed, 2 Mar 2011 09:31:10 +0100
Subject: [PATCH] Towards generalised facet limits.

---
 mkdru.client.js |   78 +++++++++++++++++++++++++++++++++++++++++++------------
 1 file changed, 61 insertions(+), 17 deletions(-)

diff --git a/mkdru.client.js b/mkdru.client.js
index 03f9507..c73e875 100644
--- a/mkdru.client.js
+++ b/mkdru.client.js
@@ -2,7 +2,6 @@
 var mkdru = {
   // Settings to pass to pz2.js
   useSessions: Drupal.settings.mkdru.use_sessions === '1',
-  //   showResponseType: 'json',
   // Variables
   active: false,
   pz2: null,
@@ -17,11 +16,15 @@ var mkdru = {
     },
     subject: {
       pz2Name: 'subject',
-      max: Drupal.settings.mkdru.subject_max
+      max: Drupal.settings.mkdru.subject_max,
+      multiLimit: true,
+      limiter: 'su'
     },
     author: {
       pz2Name: 'author',
-      max: Drupal.settings.mkdru.author_max
+      max: Drupal.settings.mkdru.author_max,
+      multiLimit: false,
+      limiter: 'au'
     }
   },
   // State
@@ -207,9 +210,43 @@ mkdru.hashChange = function () {
   }
 };
 
+// return link to limit facet
+mkdru.addLimit = function (facet, limit) {
+  var newHash = $.deparam.fragment();
+  delete newHash['page'];
+  if ((typeof(newHash['limit_' + facet]) === 'undefined')
+       || !mkdru.facets[facet].multiLimit) {
+    newHash['limit_' + facet] = limit;
+  }
+  else {
+    newHash['limit_' + facet] += ';' + limit;
+  }
+  return $.param.fragment("#", newHash);
+};
 
+// return link to remove limit from facet
+mkdru.removeLimit = function (facet, limit) {
+  var newHash = $.deparam.fragment();
+  delete newHash['page'];
+  if (!newHash['limit_' + facet].indexOf(';') || !mkdru.facets[facet].multiLimit) { 
+    delete newHash['limit_' + facet];
+  }
+  else {
+    var limits = newHash['limit_' + facet].split(';');
+    for (var i = 0; i < limits.length; i++) {
+      if (limits[i] == limit) {
+        limits.splice(i, 1);
+        newHash['limit_' + facet] = limits.join(';');
+        break;
+      }
+    }
+  }
+  return $.param.fragment("#", newHash);
+};
 
-//form submit handler
+
+
+// form submit handler
 mkdru.submitQuery = function () {
   // new query, back to defaults (shallow copy)
   mkdru.state = $.extend({}, mkdru.defaultState);
@@ -221,7 +258,7 @@ mkdru.submitQuery = function () {
   return false;
 };
 
-//criteria drop-down (perpage, sort) handler
+// criteria drop-down (perpage, sort) handler
 mkdru.submitCriteria = function () {
   mkdru.pollDropDowns();
   //search is not ON, do nothing
@@ -238,17 +275,24 @@ mkdru.search = function () {
   var query = mkdru.state.query;
 
   // facet limit implementation
-  if (mkdru.state.limit_source) {
-    filter = 'pz:id=' + mkdru.state.limit_source;
-  }
-  if (mkdru.state.limit_subject) {
-    query += ' and su="' + mkdru.state.limit_subject + '"';
-  }
-  if (mkdru.state.limit_author) {
-    query += ' and au="' + mkdru.state.limit_author + '"';
+  for (var facet in mkdru.facets) {
+    // facet is limited
+    if (mkdru.state['limit_' + facet]) {
+      if (facet == "source") {
+        filter = 'pz:id=' + mkdru.state.limit_source;
+      }
+      else {
+        var limits = mkdru.state['limit_' + facet].split(';');
+        for (var i = 0; i < limits.length; i++) {
+          // ex. query + and au="{limit_author}"
+          query += ' and ' + mkdru.facets[facet]['limiter'] + '="'
+                  + mkdru.state['limit_' + facet] + '"';
+        }
+      }
+    }
   }
+
   mkdru.pz2.search(query, mkdru.state.perpage, mkdru.state.sort, filter);
-  //inform others that the search is ON
   mkdru.active = true;
 };
 
@@ -258,7 +302,7 @@ mkdru.pollDropDowns = function () {
 };
 
 mkdru.generatePager = function () {
- // make sure page param is a number, otherwise pageing frwd will be broken
+  // cast page parameter to numeric so we can add to it
   if (typeof mkdru.state.page == "string") {
     mkdru.state.page = Number(mkdru.state.page);
   }
@@ -266,7 +310,7 @@ mkdru.generatePager = function () {
   var first = (mkdru.state.page - mkdru.pagerRange > 0)
       ? mkdru.state.page - mkdru.pagerRange : 1;
   var last = first + 2 * mkdru.pagerRange < total
-      ? first + 2 * mkdru.pagerRange : total;  
+      ? first + 2 * mkdru.pagerRange : total;
   var prev = null;
   var next = null;
   var pages = [];
@@ -329,7 +373,7 @@ $(document).ready(function () {
   if (typeof(Drupal.settings.mkdru.query) !== "undefined") {
     mkdru.state.query = Drupal.settings.mkdru.query
   }
-  
+
   //not running against SP? init, otherwise authenticate
   if (mkdru.useSessions) {
     mkdru.pz2.init();
-- 
1.7.10.4