fql-toolkit/dist/conditions.js

Fql Toolkit

import FQLError from './errors.js';
const VALID_OPERATORS = [
    '=', '!=', '<>', '<', '>', '<=', '>=',
];
/**
 * Builds an internal FQL condition array from a plain-string triple.
 *
 * @example
 * buildCondition('age', '>', 18)
 *   → ['>', ['symb', 'age'], 18]
 *
 * buildCondition('owner.name', '=', 'Ana')
 *   → ['=', ['symb', 'owner', 'name'], 'Ana']
 */
export function buildCondition(field, operator, value) {
    if (typeof field !== 'string' || field.trim() === '') {
        throw new FQLError('Condition field must be a non-empty string');
    }
    if (!VALID_OPERATORS.includes(operator)) {
        throw new FQLError(`Invalid operator "${operator}". Valid operators: ${VALID_OPERATORS.join(', ')}`);
    }
    const fieldExpr = ['symb', ...field.split('.')];
    return [operator, fieldExpr, value];
}
/**
 * Combines multiple condition arrays into a single AND expression.
 *
 * @example
 * mergeConditions([cond1])           → cond1
 * mergeConditions([cond1, cond2])    → ['and', cond1, cond2]
 * mergeConditions([])                → null
 */
export function mergeConditions(conditions) {
    if (conditions.length === 0)
        return null;
    if (conditions.length === 1)
        return conditions[0];
    return ['and', ...conditions];
}
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