/**
* planRenameSymbol ツールの実装
* シンボルのリネームに必要な編集プランを返す
*/
import ts from "typescript";
import path from "node:path";
import fs from "node:fs";
import { createTsService } from "../tsService.js";
import type {
PlanRenameSymbolParams,
PlanRenameSymbolResult,
FileTextEdits,
TextEdit,
Range,
} from "../types.js";
/**
* シンボルのリネームプランを作成する
*
* @param params リネームパラメータ
* @returns リネーム可否と編集プラン
*/
export function planRenameSymbol(
params: PlanRenameSymbolParams
): PlanRenameSymbolResult {
// 1. projectRoot を絶対パスに正規化
const absProjectRoot = path.resolve(params.projectRoot);
// 2. createTsService で service を取得
let service: ts.LanguageService;
try {
const tsServiceResult = createTsService(absProjectRoot);
service = tsServiceResult.service;
} catch (error) {
return {
canRename: false,
reason:
error instanceof Error ? error.message : "Failed to create TS service",
};
}
// 3. filePath を絶対パスに正規化
const absFilePath = path.isAbsolute(params.filePath)
? params.filePath
: path.resolve(absProjectRoot, params.filePath);
// 4. ファイル内容を読み込み
if (!fs.existsSync(absFilePath)) {
return {
canRename: false,
reason: `File not found: ${absFilePath}`,
};
}
const fileText = fs.readFileSync(absFilePath, "utf8");
const sourceFile = ts.createSourceFile(
absFilePath,
fileText,
ts.ScriptTarget.Latest,
true
);
// 5. ts.getPositionOfLineAndCharacter で位置を計算
const pos = ts.getPositionOfLineAndCharacter(
sourceFile,
params.line,
params.character
);
// 6. service.getRenameInfo() でリネーム可否を確認
const renameInfo = service.getRenameInfo(absFilePath, pos);
if (!renameInfo.canRename) {
return {
canRename: false,
reason:
renameInfo.localizedErrorMessage ?? "Cannot rename this symbol",
};
}
// 7. service.findRenameLocations() でリネーム箇所を取得
const locations =
service.findRenameLocations(
absFilePath,
pos,
params.findInStrings ?? false,
params.findInComments ?? false,
false // providePrefixAndSuffixTextForRename
) ?? [];
// 8. 各 location を TextEdit に変換し、fileName ごとにまとめる
const editsByFile = new Map<string, TextEdit[]>();
for (const location of locations) {
const fileName = location.fileName;
// ファイルのテキストを読み込む
if (!fs.existsSync(fileName)) {
continue;
}
const locationFileText = fs.readFileSync(fileName, "utf8");
const locationSourceFile = ts.createSourceFile(
fileName,
locationFileText,
ts.ScriptTarget.Latest,
true
);
// textSpan を Range に変換
const start = ts.getLineAndCharacterOfPosition(
locationSourceFile,
location.textSpan.start
);
const end = ts.getLineAndCharacterOfPosition(
locationSourceFile,
location.textSpan.start + location.textSpan.length
);
const range: Range = {
start: {
line: start.line,
character: start.character,
},
end: {
line: end.line,
character: end.character,
},
};
// TextEdit を構築
const textEdit: TextEdit = {
range,
newText: params.newName,
};
// fileName ごとにまとめる
const edits = editsByFile.get(fileName) ?? [];
edits.push(textEdit);
editsByFile.set(fileName, edits);
}
// 9. FileTextEdits[] を構築
const fileTextEdits: FileTextEdits[] = Array.from(editsByFile.entries()).map(
([filePath, textEdits]) => ({
filePath,
textEdits,
})
);
return {
canRename: true,
edits: fileTextEdits,
};
}
