[Tutorials] Add telemetry tutorial

tutorials/telemetry/src/ExampleTelemetryModelProvider.js

@@ -0,0 +1,78 @@
+define(
+    function () {
+        "use strict";
+
+        var PREFIX = "example_tlm:",
+            FORMAT_MAPPINGS = {
+                float: "number",
+                integer: "number",
+                string: "string"
+            };
+
+        function ExampleTelemetryModelProvider(adapter, $q) {
+            var modelPromise, empty = $q.when({});
+
+            // Check if this model is in our dictionary (by prefix)
+            function isRelevant(id) {
+                return id.indexOf(PREFIX) === 0;
+            }
+
+            // Build a domain object identifier by adding a prefix
+            function makeId(element) {
+                return PREFIX + element.identifier;
+            }
+
+            // Create domain object models from this dictionary
+            function buildTaxonomy(dictionary) {
+                var models = {};
+
+                // Create & store a domain object model for a measurement
+                function addMeasurement(measurement) {
+                    var format = FORMAT_MAPPINGS[measurement.type];
+                    models[makeId(measurement)] = {
+                        type: "example.measurement",
+                        name: measurement.name,
+                        telemetry: {
+                            key: measurement.identifier,
+                            ranges: [{
+                                key: "value",
+                                name: "Value",
+                                units: measurement.units,
+                                format: format
+                            }]
+                        }
+                    };
+                }
+
+                // Create & store a domain object model for a subsystem
+                function addSubsystem(subsystem) {
+                    var measurements =
+                        (subsystem.measurements || []);
+                    models[makeId(subsystem)] = {
+                        type: "example.subsystem",
+                        name: subsystem.name,
+                        composition: measurements.map(makeId)
+                    };
+                    measurements.forEach(addMeasurement);
+                }
+
+                (dictionary.subsystems || []).forEach(addSubsystem);
+
+                return models;
+            }
+
+            // Begin generating models once the dictionary is available
+            modelPromise = adapter.dictionary().then(buildTaxonomy);
+
+            return {
+                getModels: function (ids) {
+                    // Return models for the dictionary only when they
+                    // are relevant to the request.
+                    return ids.some(isRelevant) ? modelPromise : empty;
+                }
+            };
+        }
+
+        return ExampleTelemetryModelProvider;
+    }
+);