96 lines
2.3 KiB
JavaScript
96 lines
2.3 KiB
JavaScript
function getValueAtPath(obj, fieldPath) {
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const pathSequence = fieldPath.split('.');
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let pointer = obj;
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for(let i = 0; i < pathSequence.length; i++) {
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pointer = pointer[pathSequence[i]];
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}
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return pointer;
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}
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function copyAndMutateAtPath(obj, fieldPath, val) {
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const copy = deepCopy(obj);
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const changed = mutateAtPath(copy, fieldPath, val);
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return changed;
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}
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function mutateAtPath(obj, fieldPath, val) {
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if(fieldPath === "") {
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return val;
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}
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const pathSequence = fieldPath.split('.');
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let pointer = obj;
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for(let i = 0; i < pathSequence.length - 1; i++) {
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pointer = pointer[pathSequence[i]];
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}
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pointer[pathSequence[pathSequence.length - 1]] = val;
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return obj;
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}
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function deepCopy(obj) {
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return structuredClone(obj);
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}
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function getDataPathFromString(dataPathString) {
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const arraySplit = dataPathString.indexOf('[');
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const isArray = arraySplit > 0;
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if(isArray) {
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const preTokens = dataPathString.split('[');
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const postTokens = preTokens[1].split(']');
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const prefix = preTokens[0];
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const postfixRaw = postTokens[1];
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const postfix = postfixRaw.indexOf('.') === 0 ? postfixRaw.slice(1) : postfixRaw;
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const index = parseInt(postTokens[0]);
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return {
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path: prefix,
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isArray: true,
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index: index,
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subPath: postfix,
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};
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} else {
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return {
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path: dataPathString,
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isArray: false,
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index: 0,
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subPath: null,
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};
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}
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}
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export async function updateField(actor, dataPathString, value) {
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const dataPath = getDataPathFromString(dataPathString);
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console.log(`Converted ${dataPathString} to:`);
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console.log(dataPath);
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console.log(`Writing: ${value} (${typeof value})`);
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if(dataPath.isArray) {
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const initial = getValueAtPath(actor, dataPath.path);
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const copy = initial.map(e => deepCopy(e));
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copy[dataPath.index] = copyAndMutateAtPath(initial[dataPath.index], dataPath.subPath, value);
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console.log(`Array write at index ${dataPath.index}`);
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console.log(copy);
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await actor.update({
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[dataPath.path]: copy,
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});
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} else {
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await actor.update({
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[dataPath.path]: value
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});
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}
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} |