feat(SDK): check for dependencies between viewer modules

Author: CGjupoulton

engine/core/src/main/resources/view/core/Drawer.js

@@ -92,11 +92,22 @@ export class Drawer {
 
   instantiateModules () {
     this.modules = {}
-    for (const Module of config.modules) {
+
+    const moduleNames = config.modules.map(Module => Module.moduleName ?? Module.name)
+
+    for (let idx = 0; idx < config.modules.length; ++idx) {
+      const Module = config.modules[idx]
       try {
-        this.modules[Module.moduleName || Module.name] = new Module(assets)
+        const dependencies = Module.dependencies ?? []
+        for (let dep of dependencies) {
+          if (!moduleNames.slice(0, idx).includes(dep)) {
+            throw new Error(`Required module "${dep}" not yet loaded. Make sure it comes first in your config.js "modules" array`)
+          }
+        }
+
+        this.modules[Module.moduleName ?? Module.name] = new Module(assets)
       } catch (error) {
-        this.handleModuleError(Module.moduleName || Module.name, error)
+        this.handleModuleError(Module.moduleName ?? Module.name, error)
       }
     }
   }