@goatlab/fluent/dist/TypeOrmConnector/util/extractMetadataFromKeys.js

Readable query Interface & API generator for TS and Node

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.extractMetadataFromKeys = void 0;
// Cache for regex patterns
const REGEX_CACHE = {
    manyToOne: /___XXManyToOneXX/g,
    oneToMany: /___XXOneToManyXX/g,
    tripleSep: /___/g,
    xxPattern: /XX___/g,
    xxReplace: /XX/g,
};
const extractMetadataFromKeys = (keys) => {
    // Example of a key
    // Level 0:
    //    users__id
    // Level 2:
    //    users___XXOneToManyXX___cars___XXManyToOneXX___user__id
    const keyToNestedKeyMap = Object.create(null);
    for (let i = 0; i < keys.length; i++) {
        const key = keys[i];
        // All keys have an _ before the actual attribute name
        const preAttributeIndex = key.lastIndexOf('_');
        const fullTableAlias = key.slice(0, preAttributeIndex).replace('_', '');
        const keyName = key.slice(preAttributeIndex + 1);
        const flattened = fullTableAlias
            .replace(REGEX_CACHE.manyToOne, '')
            .replace(REGEX_CACHE.oneToMany, '')
            .replace(REGEX_CACHE.tripleSep, '.')
            .replace('__', '.')
            .replace('.XXOneToManyXX', '');
        const possibleCurrentTableKey = key.lastIndexOf('___');
        const relation = possibleCurrentTableKey <= 0
            ? undefined
            : key.slice(possibleCurrentTableKey + 3, preAttributeIndex);
        const possibleParentTableKeyInit = key.lastIndexOf('___XX');
        const possibleParentTableKeyEnd = key.lastIndexOf('XX__');
        const cardinality = key.slice(possibleParentTableKeyInit, possibleParentTableKeyEnd) ||
            undefined;
        const parentRelationKey = key
            .substring(0, possibleParentTableKeyInit)
            .lastIndexOf('___');
        const parentRelation = key
            .substring(parentRelationKey, possibleParentTableKeyInit)
            .replace(REGEX_CACHE.tripleSep, '') || undefined;
        const levelMatches = key.match(REGEX_CACHE.xxPattern);
        const level = levelMatches ? levelMatches.length : 0;
        keyToNestedKeyMap[key] = {
            keyName,
            nestableKey: `${flattened}.${keyName}`,
            relation,
            parentRelation,
            level,
            cardinality: cardinality
                ?.replace(REGEX_CACHE.xxReplace, '')
                .replace(REGEX_CACHE.tripleSep, ''),
        };
    }
    return keyToNestedKeyMap;
};
exports.extractMetadataFromKeys = extractMetadataFromKeys;
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