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unindent to typescript
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| expect( | |
| unindent` | |
| Ok | |
| `, | |
| ).toEqual("Ok\n"); | |
| expect( | |
| unindent` | |
| foo | |
| biz | |
| `, | |
| ).toEqual("foo\n biz\n"); | |
| expect( | |
| unindent(2)` | |
| foo | |
| biz | |
| `, | |
| ).toEqual(" foo\n biz\n"); |
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| type UnindentParamsStringRaw = Parameters<typeof String.raw>; | |
| type UnindentParamsIndentSize = [indentSize: number]; | |
| type UnindentParams = UnindentParamsStringRaw | UnindentParamsIndentSize; | |
| const isUnindentParamsIndentSize = ( | |
| params: unknown, | |
| ): params is UnindentParamsIndentSize => | |
| typeof params === "object" && | |
| Array.isArray(params) && | |
| typeof params[0] === "number"; | |
| const isUnindentParamsStringRaw = ( | |
| params: unknown, | |
| ): params is UnindentParamsStringRaw => | |
| typeof params === "object" && | |
| Array.isArray(params) && | |
| typeof params[0] === "object" && | |
| typeof params[0].raw === "object" && | |
| Array.isArray(params[0].raw); | |
| const unindentTemplate = (indentSize: number, template: string) => | |
| template | |
| .split("\n") | |
| .splice(1) | |
| .map((line) => line.substring(indentSize)) | |
| .join("\n"); | |
| const getIndentSize = (template: string) => | |
| /\n(?<indent>\s+)/.exec(template)?.groups?.indent.length ?? 0; | |
| type ResponseRendered = string; | |
| type ResponseRender = (...params: UnindentParamsStringRaw) => ResponseRendered; | |
| type R<T extends UnindentParams> = T extends UnindentParamsIndentSize | |
| ? ResponseRender | |
| : ResponseRendered; | |
| export const unindent = <T extends UnindentParams>(...params: T): R<T> => { | |
| const paramsUnknown: unknown = params; | |
| if (isUnindentParamsIndentSize(paramsUnknown)) { | |
| const indentSize = paramsUnknown[0]; | |
| const render: ResponseRender = (...params) => | |
| unindentTemplate(indentSize, String.raw(...params)); | |
| return render as any; | |
| } | |
| if (isUnindentParamsStringRaw(paramsUnknown)) { | |
| const template = String.raw(...paramsUnknown); | |
| const indentSize = getIndentSize(template); | |
| const rendered: ResponseRendered = unindentTemplate(indentSize, template); | |
| return rendered as any; | |
| } | |
| throw new Error("Invalid params"); | |
| }; |
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