LT-275: Creating measure flow component common section

Packages/ohif-core/client/components/base/template.js

@@ -0,0 +1,106 @@
+import { OHIF } from 'meteor/ohif:core';
+import { _ } from 'meteor/underscore';
+
+// Create a new custom template for the base component
+Template.baseComponent = new Template('baseComponent', () => {});
+
+// Inject some custom behaviors in the  view's construction function
+Template.baseComponent.constructView = function(contentFunc, elseFunc) {
+    // Get the data passed to the template
+    const data = Template.currentData();
+
+    // Check the base template. If it's not informed set as the custom base
+    data.base || (data.base = 'baseCustom');
+
+    // Get the base template object
+    const baseTemplate = Template[data.base];
+
+    // Throw an error if the base template does not exists
+    if (!baseTemplate) {
+        throw new Error(`Template ${data.base} not found.`);
+    }
+
+    // Declare the template object and name it as base name + 'Component'
+    const template = OHIF.blaze.cloneTemplate(baseTemplate, data.base + 'Component');
+
+    // Extract the render function from the base template
+    template.renderFunction = baseTemplate.renderFunction;
+
+    // Check for the mixins. If it's not informed set the lowest level mixin
+    const mixins = data.mixins || 'component';
+
+    // Init the data manipulation mixins
+    OHIF.Mixin.initData(data);
+
+    // Create and fill a list of wrappers that will enclose the component
+    const wrappers = [];
+    if (data.wrappers) {
+        const wrappersList = data.wrappers.split(' ');
+        _.each(wrappersList, wrapper => wrapper && wrappers.push(wrapper));
+    }
+
+    // Declare a variable to store the wrapper instances that will be rendered
+    const wrapperInstances = [];
+
+    // Declare the content function to render the component
+    let contentFunction = () => {
+        // Create the most inner content function
+        const innerContentFunction = () => {
+            // Assign properties to all wrappers after template's creation
+            template.onCreated(() => {
+                const instance = Template.instance();
+
+                // Assign the template most outer wrapper
+                instance.wrapper = wrapperInstances[0] || instance;
+
+                // Iterate over all wrappers and assign the component to them
+                wrapperInstances.forEach(wrappeInstance => {
+                    wrappeInstance.component = instance.component;
+                });
+            });
+
+            // Return the view instance
+            return template.constructView(contentFunc, elseFunc);
+        };
+
+        // Apply the mixins to the component
+        OHIF.Mixin.initAll(template, data);
+
+        // Return the recursive function for wrappers
+        return Blaze.With(data, innerContentFunction);
+    };
+
+    let wrapper;
+    while (wrapper = wrappers.shift()) {
+        // Get the wrapper template
+        const wrapperTemplate = Template[wrapper];
+
+        // Throw an error if the wrapper template does not exists
+        if (!wrapperTemplate) {
+            throw new Error(`Template ${wrapper} not found.`);
+        }
+
+        // Clone the wrapper template to avoid assigning duplicated handlers
+        const currentTemplate = OHIF.blaze.cloneTemplate(wrapperTemplate);
+
+        // Store the child content function to render it inside the wrapper
+        const childContentFunction = contentFunction;
+
+        // Create a function that will enable the recursion for wrappers
+        const enclosingContentFunction = () => {
+            // Add the current wrapper's instance to the wrapper instances list
+            currentTemplate.onCreated(() => wrapperInstances.push(Template.instance()));
+
+            // Return the wrapper view instance with its child as content
+            return currentTemplate.constructView(childContentFunction, elseFunc);
+        };
+
+        // Replace the content function enclosing it recursively
+        contentFunction = () => {
+            return Blaze.With(data, enclosingContentFunction);
+        };
+
+    }
+
+    return contentFunction(contentFunc, elseFunc);
+};