eslint rules

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

@@ -0,0 +1,91 @@
+/**
+ * ESLint rule to enforce ViewData contract implementation
+ *
+ * ViewData files in lib/view-data/ must:
+ * 1. Be interfaces or types named *ViewData
+ * 2. Extend the ViewData interface from contracts
+ */
+
+module.exports = {
+  meta: {
+    type: 'problem',
+    docs: {
+      description: 'Enforce ViewData contract implementation',
+      category: 'Contracts',
+      recommended: true,
+    },
+    fixable: null,
+    schema: [],
+    messages: {
+      notAnInterface: 'ViewData files must be interfaces or types named *ViewData',
+      missingExtends: 'ViewData must extend the ViewData interface from lib/contracts/view-data/ViewData.ts',
+    },
+  },
+
+  create(context) {
+    const filename = context.getFilename();
+    const isInViewData = filename.includes('/lib/view-data/');
+    
+    if (!isInViewData) return {};
+
+    let hasViewDataExtends = false;
+    let hasCorrectName = false;
+
+    return {
+      // Check interface declarations
+      TSInterfaceDeclaration(node) {
+        const interfaceName = node.id?.name;
+        
+        if (interfaceName && interfaceName.endsWith('ViewData')) {
+          hasCorrectName = true;
+          
+          // Check if it extends ViewData
+          if (node.extends && node.extends.length > 0) {
+            for (const ext of node.extends) {
+              if (ext.type === 'TSExpressionWithTypeArguments' &&
+                  ext.expression.type === 'Identifier' &&
+                  ext.expression.name === 'ViewData') {
+                hasViewDataExtends = true;
+              }
+            }
+          }
+        }
+      },
+
+      // Check type alias declarations
+      TSTypeAliasDeclaration(node) {
+        const typeName = node.id?.name;
+        
+        if (typeName && typeName.endsWith('ViewData')) {
+          hasCorrectName = true;
+          
+          // For type aliases, check if it's an intersection with ViewData
+          if (node.typeAnnotation && node.typeAnnotation.type === 'TSIntersectionType') {
+            for (const type of node.typeAnnotation.types) {
+              if (type.type === 'TSTypeReference' &&
+                  type.typeName &&
+                  type.typeName.type === 'Identifier' &&
+                  type.typeName.name === 'ViewData') {
+                hasViewDataExtends = true;
+              }
+            }
+          }
+        }
+      },
+
+      'Program:exit'() {
+        if (!hasCorrectName) {
+          context.report({
+            node: context.getSourceCode().ast,
+            messageId: 'notAnInterface',
+          });
+        } else if (!hasViewDataExtends) {
+          context.report({
+            node: context.getSourceCode().ast,
+            messageId: 'missingExtends',
+          });
+        }
+      },
+    };
+  },
+};