1 files changed, 94 insertions, 0 deletions
diff --git a/web/gui/src/dashboard.js/chart-registry.js b/web/gui/src/dashboard.js/chart-registry.js
new file mode 100644
index 000000000..542f4e016
--- /dev/null
+++ b/web/gui/src/dashboard.js/chart-registry.js
@@ -0,0 +1,94 @@
+
+// *** src/dashboard.js/chart-registry.js
+
+// Chart Registry
+
+// When multiple charts need the same chart, we avoid downloading it
+// multiple times (and having it in browser memory multiple time)
+// by using this registry.
+
+// Every time we download a chart definition, we save it here with .add()
+// Then we try to get it back with .get(). If that fails, we download it.
+
+NETDATA.fixHost = function (host) {
+    while (host.slice(-1) === '/') {
+        host = host.substring(0, host.length - 1);
+    }
+
+    return host;
+};
+
+NETDATA.chartRegistry = {
+    charts: {},
+
+    globalReset: function () {
+        this.charts = {};
+    },
+
+    add: function (host, id, data) {
+        if (typeof this.charts[host] === 'undefined') {
+            this.charts[host] = {};
+        }
+
+        //console.log('added ' + host + '/' + id);
+        this.charts[host][id] = data;
+    },
+
+    get: function (host, id) {
+        if (typeof this.charts[host] === 'undefined') {
+            return null;
+        }
+
+        if (typeof this.charts[host][id] === 'undefined') {
+            return null;
+        }
+
+        //console.log('cached ' + host + '/' + id);
+        return this.charts[host][id];
+    },
+
+    downloadAll: function (host, callback) {
+        host = NETDATA.fixHost(host);
+
+        let self = this;
+
+        function got_data(h, data, callback) {
+            if (data !== null) {
+                self.charts[h] = data.charts;
+
+                // update the server timezone in our options
+                if (typeof data.timezone === 'string') {
+                    NETDATA.options.server_timezone = data.timezone;
+                }
+            } else {
+                NETDATA.error(406, h + '/api/v1/charts');
+            }
+
+            if (typeof callback === 'function') {
+                callback(data);
+            }
+        }
+
+        if (netdataSnapshotData !== null) {
+            got_data(host, netdataSnapshotData.charts, callback);
+        } else {
+            $.ajax({
+                url: host + '/api/v1/charts',
+                async: true,
+                cache: false,
+                xhrFields: {withCredentials: true} // required for the cookie
+            })
+                .done(function (data) {
+                    data = NETDATA.xss.checkOptional('/api/v1/charts', data);
+                    got_data(host, data, callback);
+                })
+                .fail(function () {
+                    NETDATA.error(405, host + '/api/v1/charts');
+
+                    if (typeof callback === 'function') {
+                        callback(null);
+                    }
+                });
+        }
+    }
+};