fix(require-explicit-slots): add support for type references (#2617)

lib/rules/require-explicit-slots.js

@@ -98,30 +98,22 @@ module.exports = {
 
     return utils.compositingVisitors(
       utils.defineScriptSetupVisitor(context, {
-        onDefineSlotsEnter(node) {
-          const typeArguments =
-            'typeArguments' in node ? node.typeArguments : node.typeParameters
-          const param = /** @type {TypeNode|undefined} */ (
-            typeArguments?.params[0]
-          )
-          if (!param) return
-
-          if (param.type === 'TSTypeLiteral') {
-            for (const memberNode of param.members) {
-              const slotName = getSlotsName(memberNode)
-              if (!slotName) continue
-
-              if (slotsDefined.has(slotName)) {
-                context.report({
-                  node: memberNode,
-                  messageId: 'alreadyDefinedSlot',
-                  data: {
-                    slotName
-                  }
-                })
-              } else {
-                slotsDefined.add(slotName)
-              }
+        onDefineSlotsEnter(_node, slots) {
+          for (const slot of slots) {
+            if (!slot.slotName) {
+              continue
+            }
+
+            if (slotsDefined.has(slot.slotName)) {
+              context.report({
+                node: slot.node,
+                messageId: 'alreadyDefinedSlot',
+                data: {
+                  slotName: slot.slotName
+                }
+              })
+            } else {
+              slotsDefined.add(slot.slotName)
             }
           }
         }

lib/utils/index.js

@@ -26,6 +26,10 @@ const { getScope } = require('./scope')
  * @typedef {import('../../typings/eslint-plugin-vue/util-types/utils').ComponentInferTypeEmit} ComponentInferTypeEmit
  * @typedef {import('../../typings/eslint-plugin-vue/util-types/utils').ComponentUnknownEmit} ComponentUnknownEmit
  * @typedef {import('../../typings/eslint-plugin-vue/util-types/utils').ComponentEmit} ComponentEmit
+ * @typedef {import('../../typings/eslint-plugin-vue/util-types/utils').ComponentTypeSlot} ComponentTypeSlot
+ * @typedef {import('../../typings/eslint-plugin-vue/util-types/utils').ComponentInferTypeSlot} ComponentInferTypeSlot
+ * @typedef {import('../../typings/eslint-plugin-vue/util-types/utils').ComponentUnknownSlot} ComponentUnknownSlot
+ * @typedef {import('../../typings/eslint-plugin-vue/util-types/utils').ComponentSlot} ComponentSlot
  * @typedef {import('../../typings/eslint-plugin-vue/util-types/utils').ComponentModelName} ComponentModelName
  * @typedef {import('../../typings/eslint-plugin-vue/util-types/utils').ComponentModel} ComponentModel
  */
@@ -70,6 +74,7 @@ const {
 const {
   getComponentPropsFromTypeDefine,
   getComponentEmitsFromTypeDefine,
+  getComponentSlotsFromTypeDefine,
   isTypeNode
 } = require('./ts-utils')
 
@@ -1435,7 +1440,7 @@ module.exports = {
         'onDefineSlotsEnter',
         'onDefineSlotsExit',
         (candidateMacro, node) => candidateMacro === node,
-        () => undefined
+        getComponentSlotsFromDefineSlots
       ),
       new MacroListener(
         'defineExpose',
@@ -3372,6 +3377,28 @@ function getComponentEmitsFromDefineEmits(context, node) {
     }
   ]
 }
+
+/**
+ * Get all slots from `defineSlots` call expression.
+ * @param {RuleContext} context The rule context object.
+ * @param {CallExpression} node `defineSlots` call expression
+ * @return {ComponentSlot[]} Array of component slots
+ */
+function getComponentSlotsFromDefineSlots(context, node) {
+  const typeArguments =
+    'typeArguments' in node ? node.typeArguments : node.typeParameters
+  if (typeArguments && typeArguments.params.length > 0) {
+    return getComponentSlotsFromTypeDefine(context, typeArguments.params[0])
+  }
+  return [
+    {
+      type: 'unknown',
+      slotName: null,
+      node: null
+    }
+  ]
+}
+
 /**
  * Get model info from `defineModel` call expression.
  * @param {RuleContext} _context The rule context object.
@@ -3414,6 +3441,7 @@ function getComponentModelFromDefineModel(_context, node) {
     typeNode: null
   }
 }
+
 /**
  * Get all props by looking at all component's properties
  * @param {ObjectExpression|ArrayExpression} propsNode Object with props definition

lib/utils/ts-utils/index.js

@@ -5,11 +5,13 @@ const {
   isTSTypeLiteralOrTSFunctionType,
   extractRuntimeEmits,
   flattenTypeNodes,
-  isTSInterfaceBody
+  isTSInterfaceBody,
+  extractRuntimeSlots
 } = require('./ts-ast')
 const {
   getComponentPropsFromTypeDefineTypes,
-  getComponentEmitsFromTypeDefineTypes
+  getComponentEmitsFromTypeDefineTypes,
+  getComponentSlotsFromTypeDefineTypes
 } = require('./ts-types')
 
 /**
@@ -22,12 +24,16 @@ const {
  * @typedef {import('../index').ComponentTypeEmit} ComponentTypeEmit
  * @typedef {import('../index').ComponentInferTypeEmit} ComponentInferTypeEmit
  * @typedef {import('../index').ComponentUnknownEmit} ComponentUnknownEmit
+ * @typedef {import('../index').ComponentTypeSlot} ComponentTypeSlot
+ * @typedef {import('../index').ComponentInferTypeSlot} ComponentInferTypeSlot
+ * @typedef {import('../index').ComponentUnknownSlot} ComponentUnknownSlot
  */
 
 module.exports = {
   isTypeNode,
   getComponentPropsFromTypeDefine,
-  getComponentEmitsFromTypeDefine
+  getComponentEmitsFromTypeDefine,
+  getComponentSlotsFromTypeDefine
 }
 
 /**
@@ -86,3 +92,30 @@ function getComponentEmitsFromTypeDefine(context, emitsNode) {
   }
   return result
 }
+
+/**
+ * Get all slots by looking at all component's properties
+ * @param {RuleContext} context The ESLint rule context object.
+ * @param {TypeNode} slotsNode Type with slots definition
+ * @return {(ComponentTypeSlot|ComponentInferTypeSlot|ComponentUnknownSlot)[]} Array of component slots
+ */
+function getComponentSlotsFromTypeDefine(context, slotsNode) {
+  /** @type {(ComponentTypeSlot|ComponentInferTypeSlot|ComponentUnknownSlot)[]} */
+  const result = []
+  for (const defNode of flattenTypeNodes(
+    context,
+    /** @type {TSESTreeTypeNode} */ (slotsNode)
+  )) {
+    if (isTSInterfaceBody(defNode) || isTSTypeLiteral(defNode)) {
+      result.push(...extractRuntimeSlots(defNode))
+    } else {
+      result.push(
+        ...getComponentSlotsFromTypeDefineTypes(
+          context,
+          /** @type {TypeNode} */ (defNode)
+        )
+      )
+    }
+  }
+  return result
+}

lib/utils/ts-utils/ts-ast.js

@@ -15,6 +15,8 @@ const { inferRuntimeTypeFromTypeNode } = require('./ts-types')
  * @typedef {import('../index').ComponentUnknownProp} ComponentUnknownProp
  * @typedef {import('../index').ComponentTypeEmit} ComponentTypeEmit
  * @typedef {import('../index').ComponentUnknownEmit} ComponentUnknownEmit
+ * @typedef {import('../index').ComponentTypeSlot} ComponentTypeSlot
+ * @typedef {import('../index').ComponentUnknownSlot} ComponentUnknownSlot
  */
 
 const noop = Function.prototype
@@ -26,7 +28,8 @@ module.exports = {
   isTSTypeLiteral,
   isTSTypeLiteralOrTSFunctionType,
   extractRuntimeProps,
-  extractRuntimeEmits
+  extractRuntimeEmits,
+  extractRuntimeSlots
 }
 
 /**
@@ -209,6 +212,38 @@ function* extractRuntimeEmits(node) {
   }
 }
 
+/**
+ * @param {TSESTreeTSTypeLiteral | TSESTreeTSInterfaceBody} node
+ * @returns {IterableIterator<ComponentTypeSlot | ComponentUnknownSlot>}
+ */
+function* extractRuntimeSlots(node) {
+  const members = node.type === 'TSTypeLiteral' ? node.members : node.body
+  for (const member of members) {
+    if (
+      member.type === 'TSPropertySignature' ||
+      member.type === 'TSMethodSignature'
+    ) {
+      if (member.key.type !== 'Identifier' && member.key.type !== 'Literal') {
+        yield {
+          type: 'unknown',
+          slotName: null,
+          node: /** @type {Expression} */ (member.key)
+        }
+        continue
+      }
+      yield {
+        type: 'type',
+        key: /** @type {Identifier | Literal} */ (member.key),
+        slotName:
+          member.key.type === 'Identifier'
+            ? member.key.name
+            : `${member.key.value}`,
+        node: /** @type {TSPropertySignature | TSMethodSignature} */ (member)
+      }
+    }
+  }
+}
+
 /**
  * @param {TSESTreeParameter} eventName
  * @param {TSCallSignatureDeclaration | TSFunctionType} member

lib/utils/ts-utils/ts-types.js

@@ -24,11 +24,14 @@ const {
  * @typedef {import('../index').ComponentUnknownProp} ComponentUnknownProp
  * @typedef {import('../index').ComponentInferTypeEmit} ComponentInferTypeEmit
  * @typedef {import('../index').ComponentUnknownEmit} ComponentUnknownEmit
+ * @typedef {import('../index').ComponentInferTypeSlot} ComponentInferTypeSlot
+ * @typedef {import('../index').ComponentUnknownSlot} ComponentUnknownSlot
  */
 
 module.exports = {
   getComponentPropsFromTypeDefineTypes,
   getComponentEmitsFromTypeDefineTypes,
+  getComponentSlotsFromTypeDefineTypes,
   inferRuntimeTypeFromTypeNode
 }
 
@@ -122,6 +125,34 @@ function getComponentEmitsFromTypeDefineTypes(context, emitsNode) {
   return [...extractRuntimeEmits(type, tsNode, emitsNode, services)]
 }
 
+/**
+ * Get all slots by looking at all component's properties
+ * @param {RuleContext} context The ESLint rule context object.
+ * @param {TypeNode} slotsNode Type with slots definition
+ * @return {(ComponentInferTypeSlot|ComponentUnknownSlot)[]} Array of component slots
+ */
+function getComponentSlotsFromTypeDefineTypes(context, slotsNode) {
+  const services = getTSParserServices(context)
+  const tsNode = services && services.tsNodeMap.get(slotsNode)
+  const type = tsNode && services.checker.getTypeAtLocation(tsNode)
+  if (
+    !type ||
+    isAny(type) ||
+    isUnknown(type) ||
+    isNever(type) ||
+    isNull(type)
+  ) {
+    return [
+      {
+        type: 'unknown',
+        slotName: null,
+        node: slotsNode
+      }
+    ]
+  }
+  return [...extractRuntimeSlots(type, slotsNode)]
+}
+
 /**
  * @param {RuleContext} context The ESLint rule context object.
  * @param {TypeNode|Expression} node
@@ -259,6 +290,23 @@ function* extractRuntimeEmits(type, tsNode, emitsNode, services) {
   }
 }
 
+/**
+ * @param {Type} type
+ * @param {TypeNode} slotsNode Type with slots definition
+ * @returns {IterableIterator<ComponentInferTypeSlot>}
+ */
+function* extractRuntimeSlots(type, slotsNode) {
+  for (const property of type.getProperties()) {
+    const name = property.getName()
+
+    yield {
+      type: 'infer-type',
+      slotName: name,
+      node: slotsNode
+    }
+  }
+}
+
 /**
  * @param {Type} type
  * @returns {Iterable<Type>}