From e12bf19e35867f3ea69f45054decb024a75fc2b4 Mon Sep 17 00:00:00 2001
From: Maximilian Hils <git@maximilianhils.com>
Date: Wed, 10 Dec 2014 00:47:05 +0100
Subject: web: add event store, fix all those bugs

---
 web/src/js/store/view.js | 87 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 87 insertions(+)
 create mode 100644 web/src/js/store/view.js

(limited to 'web/src/js/store/view.js')

diff --git a/web/src/js/store/view.js b/web/src/js/store/view.js
new file mode 100644
index 00000000..261429b2
--- /dev/null
+++ b/web/src/js/store/view.js
@@ -0,0 +1,87 @@
+function SortByStoreOrder(elem) {
+    return this.store.index(elem.id);
+}
+
+var default_sort = SortByStoreOrder;
+var default_filt = function(elem){
+    return true;
+};
+
+function StoreView(store, filt, sortfun) {
+    EventEmitter.call(this);
+    filt = filt || default_filt;
+    sortfun = sortfun || default_sort;
+
+    this.store = store;
+    this.store._views.push(this);
+    this.recalculate(this.store._list, filt, sortfun);
+}
+
+_.extend(StoreView.prototype, EventEmitter.prototype, {
+    close: function () {
+        this.store._views = _.without(this.store._views, this);
+    },
+    recalculate: function (elems, filt, sortfun) {
+        if (filt) {
+            this.filt = filt;
+        }
+        if (sortfun) {
+            this.sortfun = sortfun.bind(this);
+        }
+
+        this.list = elems.filter(this.filt);
+        this.list.sort(function (a, b) {
+            return this.sortfun(a) - this.sortfun(b);
+        }.bind(this));
+        this.emit("recalculate");
+    },
+    index: function (elem) {
+        return _.sortedIndex(this.list, elem, this.sortfun);
+    },
+    add: function (elem) {
+        if (this.filt(elem)) {
+            var idx = this.index(elem);
+            if (idx === this.list.length) { //happens often, .push is way faster.
+                this.list.push(elem);
+            } else {
+                this.list.splice(idx, 0, elem);
+            }
+            this.emit("add", elem, idx);
+        }
+    },
+    update: function (elem) {
+        var idx;
+        var i = this.list.length;
+        // Search from the back, we usually update the latest entries.
+        while (i--) {
+            if (this.list[i].id === elem.id) {
+                idx = i;
+                break;
+            }
+        }
+
+        if (idx === -1) { //not contained in list
+            this.add(elem);
+        } else if (!this.filt(elem)) {
+            this.remove(elem.id);
+        } else {
+            if (this.sortfun(this.list[idx]) !== this.sortfun(elem)) { //sortpos has changed
+                this.remove(this.list[idx]);
+                this.add(elem);
+            } else {
+                this.list[idx] = elem;
+                this.emit("update", elem, idx);
+            }
+        }
+    },
+    remove: function (elem_id) {
+        var idx = this.list.length;
+        while (idx--) {
+            if (this.list[idx].id === elem_id) {
+                this.list.splice(idx, 1);
+                this.emit("remove", elem_id, idx);
+                break;
+            }
+        }
+    }
+});
\ No newline at end of file
-- 
cgit v1.2.3


From 7e40b8ab09d6d605307342fbfa21129ca15ff055 Mon Sep 17 00:00:00 2001
From: Maximilian Hils <git@maximilianhils.com>
Date: Wed, 10 Dec 2014 15:25:40 +0100
Subject: web: implement settings store, modularize store

---
 web/src/js/store/view.js | 18 +++++++++++++++---
 1 file changed, 15 insertions(+), 3 deletions(-)

(limited to 'web/src/js/store/view.js')

diff --git a/web/src/js/store/view.js b/web/src/js/store/view.js
index 261429b2..56bc4dbd 100644
--- a/web/src/js/store/view.js
+++ b/web/src/js/store/view.js
@@ -13,13 +13,25 @@ function StoreView(store, filt, sortfun) {
     sortfun = sortfun || default_sort;
 
     this.store = store;
-    this.store._views.push(this);
-    this.recalculate(this.store._list, filt, sortfun);
+
+    this.add = this.add.bind(this);
+    this.update = this.update.bind(this);
+    this.remove = this.remove.bind(this);
+    this.recalculate = this.recalculate.bind(this);
+    this.store.addListener("add", this.add);
+    this.store.addListener("update", this.update);
+    this.store.addListener("remove", this.remove);
+    this.store.addListener("recalculate", this.recalculate);
+
+    this.recalculate(this.store.list, filt, sortfun);
 }
 
 _.extend(StoreView.prototype, EventEmitter.prototype, {
     close: function () {
-        this.store._views = _.without(this.store._views, this);
+        this.store.removeListener("add", this.add);
+        this.store.removeListener("update", this.update);
+        this.store.removeListener("remove", this.remove);
+        this.store.removeListener("recalculate", this.recalculate);
     },
     recalculate: function (elems, filt, sortfun) {
         if (filt) {
-- 
cgit v1.2.3