datum-merge/dist/cjs/merge-low.js

Simplified diff and merging for deeply nested objects

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.UpdateCode = void 0;
exports.mergeScalarField = mergeScalarField;
exports.mergeVectorField = mergeVectorField;
const lodash_es_1 = require("lodash-es");
const type_utils_1 = require("./type-utils");
const datum_utils_1 = require("./datum-utils");
exports.UpdateCode = {
    T: "T",
    C: "C",
    N: "N",
    Y: "Y",
    B: "B",
    U: "U",
    H: "H",
    I: "I",
    D: "D",
    XR: "XR",
    XM: "XM",
    XD: "XD",
    XI: "XI",
    XS: "XS",
    XF: "XF",
};
function mergeScalarField(target, source, label, mergeCode) {
    const sourceHas = !(0, type_utils_1.isNullish)(source[label]);
    const targetKey = target.hasOwnProperty(label);
    const targetHas = targetKey && !(0, type_utils_1.isNullish)(target[label]);
    if (!targetHas && !sourceHas) {
        return false;
    }
    if (targetHas && sourceHas) {
        if ((0, type_utils_1.typeOfValue)(target[label]) !== (0, type_utils_1.typeOfValue)(source[label])) {
            throw new TypeError("scalar type mismatch for " + label);
        }
        if (target[label] === source[label]) {
            return false;
        }
    }
    let migrateVal = false;
    switch (mergeCode) {
        case exports.UpdateCode.N:
            return false;
        case exports.UpdateCode.Y:
            target[label] = (0, datum_utils_1.deepClone)(source[label]);
            return true;
        case exports.UpdateCode.B:
            if (sourceHas)
                migrateVal = true;
            break;
        case exports.UpdateCode.U:
            if (targetHas)
                migrateVal = true;
            break;
        case exports.UpdateCode.I:
            if (!targetHas)
                migrateVal = true;
            break;
        case exports.UpdateCode.H:
            if (targetHas && sourceHas)
                migrateVal = true;
            break;
        case exports.UpdateCode.D:
            if (targetHas && !sourceHas)
                migrateVal = true;
            break;
        case exports.UpdateCode.XR:
        case exports.UpdateCode.XS:
        case exports.UpdateCode.XF:
        case exports.UpdateCode.XM:
        case exports.UpdateCode.XD:
        case exports.UpdateCode.XI:
            return mergeVectorField(target, source, label, mergeCode);
    }
    if (!migrateVal) {
        return false;
    }
    target[label] = !sourceHas || (0, type_utils_1.isPrimitive)(source[label])
        ? source[label]
        : (0, datum_utils_1.deepClone)(source[label]);
    if ((0, type_utils_1.emptyValue)(target[label])) {
        delete target[label];
        return targetKey;
    }
    return true;
}
;
function mergeVectorField(target, source, label, mergeCode) {
    var _a, _b;
    let sourceVals = source[label];
    if ((0, type_utils_1.isNullish)(sourceVals)) {
        return false;
    }
    let sourceVec = (0, type_utils_1.isArrayOfAny)(sourceVals);
    const targetKey = target.hasOwnProperty(label);
    const targetHas = targetKey && !(0, type_utils_1.isNullish)(target[label]);
    const targetVec = (0, type_utils_1.isArrayOfAny)(target[label]);
    if (targetHas && !targetVec) {
        throw new TypeError("type change to vector for " + label);
    }
    if (!sourceVec) {
        sourceVals = [sourceVals];
        sourceVec = true;
    }
    let targetVals;
    switch (mergeCode) {
        case exports.UpdateCode.N:
            return false;
        case exports.UpdateCode.Y:
            target[label] = (0, datum_utils_1.deepClone)(sourceVals);
            return true;
        case exports.UpdateCode.XR:
            targetVals = sourceVals;
            break;
        case exports.UpdateCode.XS:
            targetVals = (0, lodash_es_1.concat)((_a = target[label]) !== null && _a !== void 0 ? _a : [], sourceVals);
            break;
        case exports.UpdateCode.XF:
            targetVals = (0, lodash_es_1.concat)(sourceVals, (_b = target[label]) !== null && _b !== void 0 ? _b : []);
            break;
        case exports.UpdateCode.B:
        case exports.UpdateCode.XM:
            targetVals = (0, lodash_es_1.unionWith)(target[label], sourceVals, datum_utils_1.deepEquals);
            break;
        case exports.UpdateCode.XD:
            targetVals = (0, lodash_es_1.differenceWith)(target[label], sourceVals, datum_utils_1.deepEquals);
            break;
        case exports.UpdateCode.XI:
            targetVals = (0, lodash_es_1.intersectionWith)(target[label], sourceVals, datum_utils_1.deepEquals);
            break;
        default:
            return false;
    }
    if (!(targetVals === null || targetVals === void 0 ? void 0 : targetVals.length)) {
        delete target[label];
        return targetKey;
    }
    const changed = !(0, datum_utils_1.areArraysEqual)(targetVals, target[label]);
    target[label] = !changed ? targetVals : (0, datum_utils_1.deepClone)(targetVals);
    return changed;
}
;