Add utility importEqualsModule getImportSpecifiers (#790)

Author: trivikr

.changeset/gorgeous-bees-fly.md

@@ -0,0 +1,5 @@
+---
+"aws-sdk-js-codemod": patch
+---
+
+Add utility importEqualsModule getImportSpecifiers

src/transforms/v2-to-v3/client-names/getClientNamesRecordFromImport.ts

@@ -1,7 +1,7 @@
 import { Collection, JSCodeshift } from "jscodeshift";
 
 import { CLIENT_NAMES, PACKAGE_NAME } from "../config";
-import { getImportEqualsDeclarationType } from "../modules";
+import { getImportSpecifiers as getImportEqualsSpecifiers } from "../modules/importEqualsModule";
 import { getImportSpecifiers } from "../modules/importModule";
 import { getClientDeepImportPath } from "../utils";
 
@@ -33,12 +33,9 @@ export const getClientNamesRecordFromImport = (
       clientNamesRecord[clientName] = specifiersFromDeepImport[0].localName;
     }
 
-    const identifiersFromImportEquals = source.find(
-      j.TSImportEqualsDeclaration,
-      getImportEqualsDeclarationType(deepImportPath)
-    );
+    const identifiersFromImportEquals = getImportEqualsSpecifiers(j, source, deepImportPath);
     if (identifiersFromImportEquals.length > 0) {
-      clientNamesRecord[clientName] = identifiersFromImportEquals.nodes()[0]?.id.name;
+      clientNamesRecord[clientName] = identifiersFromImportEquals[0].localName;
     }
   }
 

src/transforms/v2-to-v3/modules/getGlobalNameFromModule.ts

@@ -1,7 +1,7 @@
 import { Collection, Identifier, JSCodeshift } from "jscodeshift";
 
 import { PACKAGE_NAME } from "../config";
-import { getImportEqualsDeclarationType } from "./getImportEqualsDeclarationType";
+import { getImportSpecifiers as getImportEqualsSpecifiers } from "../modules/importEqualsModule";
 import { getImportSpecifiers } from "./importModule";
 import { getRequireDeclarators } from "./requireModule";
 
@@ -25,13 +25,10 @@ export const getGlobalNameFromModule = (
     return importDefaultSpecifiers[0].localName;
   }
 
-  const importEqualsDeclarations = source.find(
-    j.TSImportEqualsDeclaration,
-    getImportEqualsDeclarationType(PACKAGE_NAME)
-  );
+  const importEqualsDeclarations = getImportEqualsSpecifiers(j, source, PACKAGE_NAME);
 
   if (importEqualsDeclarations.length > 0) {
-    return importEqualsDeclarations.nodes()[0]?.id?.name;
+    return importEqualsDeclarations[0].localName;
   }
 
   return undefined;

src/transforms/v2-to-v3/modules/getImportEqualsDeclarationType.ts

@@ -1,19 +1,5 @@
 import { Collection, JSCodeshift } from "jscodeshift";
-
-import { PACKAGE_NAME } from "../config";
-import { getImportEqualsDeclarationType } from "./getImportEqualsDeclarationType";
+import { getImportEqualsDeclarations } from "./importEqualsModule";
 
 export const hasImportEquals = (j: JSCodeshift, source: Collection<unknown>) =>
-  source
-    .find(j.TSImportEqualsDeclaration, getImportEqualsDeclarationType())
-    .filter((importEqualsDeclaration) => {
-      const { moduleReference } = importEqualsDeclaration.value;
-      if (moduleReference.type !== "TSExternalModuleReference") return false;
-      const { expression } = moduleReference;
-      return (
-        expression.type === "StringLiteral" &&
-        typeof expression.value === "string" &&
-        expression.value.startsWith(PACKAGE_NAME)
-      );
-    })
-    .size() > 0;
+  getImportEqualsDeclarations(j, source).size() > 0;

src/transforms/v2-to-v3/modules/hasImportEquals.ts

@@ -1,7 +1,6 @@
 import { Collection, JSCodeshift } from "jscodeshift";
 
-import { PACKAGE_NAME } from "../../config";
-import { getImportEqualsDeclarationType } from "../getImportEqualsDeclarationType";
+import { getImportEqualsDeclarations, getImportSpecifiers } from "../importEqualsModule";
 import { getDefaultName } from "./getDefaultName";
 
 export const addDefaultModule = (
@@ -10,16 +9,11 @@ export const addDefaultModule = (
   packageName: string
 ) => {
   const defaultLocalName = getDefaultName(packageName);
-  const existingImportEquals = source.find(
-    j.TSImportEqualsDeclaration,
-    getImportEqualsDeclarationType(packageName)
-  );
+  const existingImportEquals = getImportSpecifiers(j, source, packageName);
 
-  if (existingImportEquals.size()) {
+  if (existingImportEquals.length > 0) {
     if (
-      existingImportEquals
-        .nodes()
-        .some((importEqualsDeclaration) => importEqualsDeclaration.id.name === defaultLocalName)
+      existingImportEquals.some((importSpecifier) => importSpecifier.localName === defaultLocalName)
     ) {
       return;
     }
@@ -31,16 +25,7 @@ export const addDefaultModule = (
     j.tsExternalModuleReference(j.stringLiteral(packageName))
   );
 
-  const v2ImportEquals = source
-    .find(j.TSImportEqualsDeclaration, getImportEqualsDeclarationType())
-    .filter((importEqualsDeclaration) => {
-      const { moduleReference } = importEqualsDeclaration.value;
-      if (moduleReference.type !== "TSExternalModuleReference") return false;
-      const { expression } = moduleReference;
-      if (expression.type !== "StringLiteral") return false;
-      const { value } = expression;
-      return value.startsWith(PACKAGE_NAME);
-    });
+  const v2ImportEquals = getImportEqualsDeclarations(j, source);
 
   if (v2ImportEquals.size()) {
     // Insert it after the first import equals declaration.

src/transforms/v2-to-v3/modules/importEqualsModule/addDefaultModule.ts

@@ -1,9 +1,10 @@
 import { Collection, JSCodeshift } from "jscodeshift";
 
-import { getImportEqualsDeclarationType } from "../getImportEqualsDeclarationType";
 import { ModulesOptions } from "../types";
 import { addDefaultModule } from "./addDefaultModule";
 import { getDefaultName } from "./getDefaultName";
+import { getImportEqualsDeclarations } from "./getImportEqualsDeclarations";
+import { getImportSpecifiers } from "./getImportSpecifiers";
 
 export const addNamedModule = (
   j: JSCodeshift,
@@ -16,29 +17,19 @@ export const addNamedModule = (
 
   const existingDeclaration = source.find(j.TSImportEqualsDeclaration, {
     type: "TSImportEqualsDeclaration",
-    id: {
-      type: "Identifier",
-      name: localName,
-    },
+    id: { type: "Identifier", name: localName },
     moduleReference: {
       type: "TSQualifiedName",
-      left: {
-        type: "Identifier",
-        name: defaultLocalName,
-      },
-      right: {
-        type: "Identifier",
-        name: importedName,
-      },
+      left: { type: "Identifier", name: defaultLocalName },
+      right: { type: "Identifier", name: importedName },
     },
   });
 
   if (existingDeclaration.size()) {
     return;
   }
 
-  const defaultDeclaration = getImportEqualsDeclarationType(packageName);
-  if (source.find(j.TSImportEqualsDeclaration, defaultDeclaration).size() === 0) {
+  if (getImportSpecifiers(j, source, packageName).length === 0) {
     addDefaultModule(j, source, packageName);
   }
 
@@ -47,11 +38,9 @@ export const addNamedModule = (
     j.tsQualifiedName(j.identifier(defaultLocalName), j.identifier(importedName))
   );
 
-  const v3ClientImportEquals = source
-    .find(j.TSImportEqualsDeclaration, defaultDeclaration)
-    .filter(
-      (importEqualsDeclaration) => importEqualsDeclaration.value.id.name === defaultLocalName
-    );
+  const v3ClientImportEquals = getImportEqualsDeclarations(j, source, packageName).filter(
+    (importEqualsDeclaration) => importEqualsDeclaration.value.id.name === defaultLocalName
+  );
 
   // Insert import equals after the package import equals.
   if (v3ClientImportEquals.size() > 0) {

src/transforms/v2-to-v3/modules/importEqualsModule/addNamedModule.ts

@@ -0,0 +1,25 @@
+import { Collection, JSCodeshift, StringLiteral, TSExternalModuleReference } from "jscodeshift";
+import { PACKAGE_NAME } from "../../config";
+
+export const getImportEqualsDeclarations = (
+  j: JSCodeshift,
+  source: Collection<unknown>,
+  path?: string
+) =>
+  source
+    .find(j.TSImportEqualsDeclaration, {
+      type: "TSImportEqualsDeclaration",
+      moduleReference: {
+        type: "TSExternalModuleReference",
+        expression: { type: "StringLiteral" },
+      },
+    })
+    .filter((importEqualsDeclaration) => {
+      const moduleReference = importEqualsDeclaration.value
+        .moduleReference as TSExternalModuleReference;
+      const expressionValue = (moduleReference.expression as StringLiteral).value;
+      if (path) {
+        return expressionValue === path;
+      }
+      return expressionValue.startsWith(PACKAGE_NAME);
+    });

src/transforms/v2-to-v3/modules/importEqualsModule/getImportEqualsDeclarations.ts

@@ -0,0 +1,17 @@
+import { Collection, JSCodeshift } from "jscodeshift";
+import { ImportSpecifierType } from "../types";
+import { getImportEqualsDeclarations } from "./getImportEqualsDeclarations";
+
+export const getImportSpecifiers = (
+  j: JSCodeshift,
+  source: Collection<unknown>,
+  path?: string
+): ImportSpecifierType[] => {
+  const importSpecifiers = new Set<ImportSpecifierType>();
+
+  getImportEqualsDeclarations(j, source, path).forEach((importEqualsDeclaration) => {
+    importSpecifiers.add({ localName: importEqualsDeclaration.value.id.name });
+  });
+
+  return Array.from(importSpecifiers);
+};

src/transforms/v2-to-v3/modules/importEqualsModule/getImportSpecifiers.ts

@@ -1 +1,3 @@
 export * from "./addNamedModule";
+export * from "./getImportSpecifiers";
+export * from "./getImportEqualsDeclarations";