Split getV2ClientModuleNames into import/require components (#72)

Author: trivikr

.changeset/nice-melons-admire.md

@@ -0,0 +1,5 @@
+---
+"aws-sdk-js-codemod": patch
+---
+
+Split getV2ClientModuleNames into import/require components

src/transforms/v2-to-v3/utils/getV2ClientImportNames.ts

@@ -0,0 +1,15 @@
+import { Collection, JSCodeshift } from "jscodeshift";
+
+import { CLIENT_NAMES } from "./config";
+
+export const getV2ClientImportNames = (j: JSCodeshift, source: Collection<any>): string[] =>
+  CLIENT_NAMES.map((clientName) => `aws-sdk/clients/${clientName.toLowerCase()}`)
+    .map(
+      (v2ClientImportSourceValue) =>
+        source
+          .find(j.ImportDeclaration, {
+            source: { value: v2ClientImportSourceValue },
+          })
+          .nodes()[0]?.specifiers[0]?.local.name
+    )
+    .filter((v2ClientImportLocalName) => v2ClientImportLocalName !== undefined);

src/transforms/v2-to-v3/utils/getV2ClientModuleNames.ts

@@ -1,41 +1,10 @@
-import { Collection, Identifier, JSCodeshift } from "jscodeshift";
+import { Collection, JSCodeshift } from "jscodeshift";
 
-import { CLIENT_NAMES } from "./config";
+import { containsRequire } from "./containsRequire";
+import { getV2ClientImportNames } from "./getV2ClientImportNames";
+import { getV2ClientRequireNames } from "./getV2ClientRequireNames";
 
-export const getV2ClientModuleNames = (j: JSCodeshift, source: Collection<any>): string[] => {
-  const v2ClientModuleNames = [];
-
-  for (const clientName of CLIENT_NAMES) {
-    // Add specifier name to v2ClientImportNames if it is imported in the source.
-    source
-      .find(j.ImportDeclaration, {
-        source: { value: `aws-sdk/clients/${clientName.toLowerCase()}` },
-      })
-      .forEach((declerationPath) => {
-        declerationPath.value.specifiers.forEach((specifier) => {
-          if (
-            specifier.type === "ImportDefaultSpecifier" ||
-            specifier.type === "ImportNamespaceSpecifier"
-          ) {
-            v2ClientModuleNames.push(specifier.local.name);
-          }
-        });
-      });
-
-    // Add specifier name to v2ClientImportNames if it is required in the source.
-    source
-      .find(j.VariableDeclarator, {
-        id: { type: "Identifier" },
-        init: {
-          type: "CallExpression",
-          callee: { type: "Identifier", name: "require" },
-          arguments: [{ type: "Literal", value: `aws-sdk/clients/${clientName.toLowerCase()}` }],
-        },
-      })
-      .forEach((declerationPath) => {
-        v2ClientModuleNames.push((declerationPath.value.id as Identifier).name);
-      });
-  }
-
-  return v2ClientModuleNames;
-};
+export const getV2ClientModuleNames = (j: JSCodeshift, source: Collection<any>): string[] =>
+  containsRequire(j, source)
+    ? getV2ClientRequireNames(j, source)
+    : getV2ClientImportNames(j, source);

src/transforms/v2-to-v3/utils/getV2ClientRequireNames.ts

@@ -0,0 +1,22 @@
+import { Collection, Identifier, JSCodeshift } from "jscodeshift";
+
+import { CLIENT_NAMES } from "./config";
+
+export const getV2ClientRequireNames = (j: JSCodeshift, source: Collection<any>): string[] =>
+  CLIENT_NAMES.map((clientName) => `aws-sdk/clients/${clientName.toLowerCase()}`)
+    .map(
+      (v2ClientImportSourceValue) =>
+        (
+          source
+            .find(j.VariableDeclarator, {
+              id: { type: "Identifier" },
+              init: {
+                type: "CallExpression",
+                callee: { type: "Identifier", name: "require" },
+                arguments: [{ type: "Literal", value: v2ClientImportSourceValue }],
+              },
+            })
+            .nodes()[0]?.id as Identifier
+        )?.name
+    )
+    .filter((v2ClientImportLocalName) => v2ClientImportLocalName !== undefined);