eslint rules

apps/website/eslint-rules/view-model-implements.js

@@ -0,0 +1,65 @@
+/**
+ * ESLint rule to enforce ViewModel contract implementation
+ *
+ * ViewModel files in lib/view-models/ must:
+ * 1. Be classes named *ViewModel
+ * 2. Extend the ViewModel class from contracts
+ */
+
+module.exports = {
+  meta: {
+    type: 'problem',
+    docs: {
+      description: 'Enforce ViewModel contract implementation',
+      category: 'Contracts',
+      recommended: true,
+    },
+    fixable: null,
+    schema: [],
+    messages: {
+      notAClass: 'ViewModel files must be classes named *ViewModel',
+      missingExtends: 'ViewModel must extend the ViewModel class from lib/contracts/view-models/ViewModel.ts',
+    },
+  },
+
+  create(context) {
+    const filename = context.getFilename();
+    const isInViewModels = filename.includes('/lib/view-models/');
+    
+    if (!isInViewModels) return {};
+
+    let hasViewModelExtends = false;
+    let hasCorrectName = false;
+
+    return {
+      // Check class declarations
+      ClassDeclaration(node) {
+        const className = node.id?.name;
+        
+        if (className && className.endsWith('ViewModel')) {
+          hasCorrectName = true;
+          
+          // Check if it extends ViewModel
+          if (node.superClass && node.superClass.type === 'Identifier' &&
+              node.superClass.name === 'ViewModel') {
+            hasViewModelExtends = true;
+          }
+        }
+      },
+
+      'Program:exit'() {
+        if (!hasCorrectName) {
+          context.report({
+            node: context.getSourceCode().ast,
+            messageId: 'notAClass',
+          });
+        } else if (!hasViewModelExtends) {
+          context.report({
+            node: context.getSourceCode().ast,
+            messageId: 'missingExtends',
+          });
+        }
+      },
+    };
+  },
+};