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import { readFileWithFallback, createDirAndWriteFile } from '../file-helpers';
type ExplicitNewValue<T> = { newValue: T };
type WithExplicitNewValue<T> = T | ExplicitNewValue<T>;
type ExpectedElementAttributes = Record<string, WithExplicitNewValue<string | number | undefined>>;
type WithExplicitIndex<T> = T & { idx?: number };
type ExpectedElements = WithExplicitNewValue<WithExplicitIndex<ExpectedElement>[]>;
export type ExpectedElementType = {
name: string;
attributes?: ExpectedElementAttributes;
elements?: ExpectedElements;
};
export type ExpectedElementsType = {
elements: ExpectedElements;
};
export type ExpectedCommentType = {
comment: string;
};
export type ExpectedTextType = {
text: string | number | boolean;
};
export type ExpectedElement =
| ExpectedElementType
| ExpectedElementsType
| ExpectedCommentType
| ExpectedTextType;
function isElementType(el: ExpectedElement): el is ExpectedElementType {
return (el as ExpectedElementType).name !== undefined;
}
function isElementsType(el: ExpectedElement): el is ExpectedElementsType {
return !(el as ExpectedElementType).name && Boolean((el as ExpectedElementsType).elements);
}
function isCommentType(el: ExpectedElement): el is ExpectedCommentType {
return (el as ExpectedCommentType).comment !== undefined;
}
function isTextType(el: ExpectedElement): el is ExpectedTextType {
return (el as ExpectedTextType).text !== undefined;
}
function isExplicitNewValue<T>(el: WithExplicitNewValue<T>): el is ExplicitNewValue<T> {
// @ts-ignore
return typeof el === 'object' && el.hasOwnProperty('newValue');
}
function unboxExplicitNewValue<T>(el: WithExplicitNewValue<T>): T {
return isExplicitNewValue(el) ? el.newValue : el;
}
function compareElements(element: Element, expectedElement: ExpectedElement): boolean {
if (isTextType(expectedElement)) {
return element.type === 'text';
}
if (isCommentType(expectedElement)) {
return element.type === 'comment' && element.comment?.trim() === expectedElement.comment.trim();
}
if (isElementType(expectedElement) && element.type === 'element') {
if (expectedElement.name !== element.name) {
return false;
}
if (!element.attributes) {
return true;
}
for (const [key, value] of Object.entries(
(expectedElement as ExpectedElementType).attributes || {}
)) {
if (isExplicitNewValue(value)) {
// this attribute has to be overridden
continue;
}
if (element.attributes[key] !== value) {
return false;
}
}
return true;
}
return false;
}
function sortWithExplicitIndex<T>(elements?: WithExplicitIndex<T>[]): T[] | undefined {
Iif (!elements) {
return;
}
const result: T[] = new Array(elements.length);
const elementsWithExplicitIndices = elements.filter(({ idx }) => idx !== undefined);
const elementsWithoutExplicitIndices = elements.filter(({ idx }) => idx === undefined);
elementsWithoutExplicitIndices.forEach((el, idx) => (result[idx] = el));
elementsWithExplicitIndices.forEach(({ idx, ...el }, i) => {
// @ts-ignore
result.splice(idx ?? i, 0, el);
});
return result;
}
function mergeXmlElementsLists(
current?: Element[],
expected?: ExpectedElements
): Element[] | undefined {
if (isExplicitNewValue(expected) || !current) {
const sortedExpected = sortWithExplicitIndex(unboxExplicitNewValue(expected));
return sortedExpected?.map(convertToElement);
}
if (!expected) {
return current;
}
const result: WithExplicitIndex<Element>[] = [];
for (const currentElement of current) {
const idxInExpected = expected.findIndex(el => compareElements(currentElement, el));
if (idxInExpected !== -1) {
const { idx, ...element } = expected.splice(idxInExpected, 1)[0];
result.push({ idx, ...mergeXmlElements(currentElement, element) });
} else {
result.push(currentElement);
}
}
result.push(...expected.map(({ idx, ...el }) => ({ idx, ...convertToElement(el) })));
const sortedResult = sortWithExplicitIndex(result);
return sortedResult;
}
function convertToElement(expectedElement: ExpectedElement): Element {
if (isCommentType(expectedElement)) {
return {
...expectedElement,
type: 'comment',
};
}
if (isTextType(expectedElement)) {
return {
...expectedElement,
type: 'text',
};
}
Iif (isElementsType(expectedElement)) {
return {
elements: unboxExplicitNewValue(expectedElement.elements).map(convertToElement),
type: 'element',
};
}
const { elements, attributes, ...expectedRest } = expectedElement;
const result: Element = {
...expectedRest,
type: 'element',
};
if (attributes) {
result.attributes = convertExpectedAttributes(attributes);
}
if (elements) {
result.elements = unboxExplicitNewValue(elements).map(convertToElement);
}
return result;
}
function convertExpectedAttributes(
expectedAttributes?: ExpectedElementAttributes
): Attributes | undefined {
if (expectedAttributes) {
const result = Object.entries(expectedAttributes).reduce(
(acc, [key, value]) => ({
...acc,
[key]: unboxExplicitNewValue(value),
}),
{}
);
return result;
}
return undefined;
}
function mergeAndConvertToElement(
{ attributes: currentAttributes, ...currentRest }: Omit<Element, 'elements'>,
{ attributes: expectedAttributes, ...expectedRest }: Omit<ExpectedElementType, 'elements'>
): Element {
const result: Element = {
...currentRest,
...expectedRest,
};
const attributes = (currentAttributes || expectedAttributes) && {
...currentAttributes,
...convertExpectedAttributes(expectedAttributes),
};
if (attributes) {
result.attributes = attributes;
}
return result;
}
/**
* Assumption is that elements are `equal` semantically
*/
export function mergeXmlElements(current: Element, expected: ExpectedElement): Element {
if (isCommentType(expected)) {
return {
...current,
...expected,
type: 'comment',
};
}
if (isTextType(expected)) {
return {
...current,
...expected,
type: 'text',
};
}
if (isElementsType(expected)) {
const result = {
...current,
type: 'element',
};
const elements = mergeXmlElementsLists(current.elements, expected.elements);
Eif (elements) {
result.elements = elements;
}
return result;
}
const { elements: currentElements, ...currentRest } = current;
const { elements: expectedElements, ...expectedRest } = expected;
const elements = mergeXmlElementsLists(current.elements, expected.elements);
const result = {
...mergeAndConvertToElement(currentRest, expectedRest),
type: 'element',
};
Eif (elements) {
result.elements = elements;
}
return result;
}
export async function readXmlFile(
filePath: string,
fallbackContent: string = `<?xml version="1.0" encoding="utf-8"?>`
): Promise<Element> {
const fileContent = await readFileWithFallback(filePath, fallbackContent);
const fileXml = xml2js(fileContent);
return fileXml as Element;
}
export async function writeXmlFile(filePath: string, xml: Element) {
const fileXml = js2xml(xml, { indentAttributes: true, spaces: 2 });
const correctedFile = fileXml.replace(
/(?<openTag><[^\s]+)\n *(?<firstAttribute> [^\s]+=".+?")\n *((?<secondAttribute> [^\s]+=".+?")\n *)?(?<closeTag>[/?]?>)/g,
'$1$2$4$5'
);
await createDirAndWriteFile(filePath, `${correctedFile}\n`);
}
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