109 lines
2.0 KiB
JavaScript
109 lines
2.0 KiB
JavaScript
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/**
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* @flow
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* Query representation wrapper
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*/
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import { objectToUniqueId } from '../../utils';
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import type { DatabaseModifier } from '../../types';
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import type Reference from './Reference';
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// todo doc methods
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/**
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* @class Query
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*/
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export default class Query {
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_reference: Reference;
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modifiers: Array<DatabaseModifier>;
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constructor(ref: Reference, existingModifiers?: Array<DatabaseModifier>) {
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this.modifiers = existingModifiers ? [...existingModifiers] : [];
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this._reference = ref;
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}
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/**
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*
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* @param name
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* @param key
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* @return {Reference|*}
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*/
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orderBy(name: string, key?: string) {
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this.modifiers.push({
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id: `orderBy-${name}:${key || ''}`,
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type: 'orderBy',
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name,
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key,
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});
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return this._reference;
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}
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/**
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*
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* @param name
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* @param limit
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* @return {Reference|*}
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*/
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limit(name: string, limit: number) {
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this.modifiers.push({
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id: `limit-${name}:${limit}`,
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type: 'limit',
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name,
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limit,
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});
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return this._reference;
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}
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/**
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*
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* @param name
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* @param value
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* @param key
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* @return {Reference|*}
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*/
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filter(name: string, value: any, key?: string) {
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this.modifiers.push({
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id: `filter-${name}:${objectToUniqueId(value)}:${key || ''}`,
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type: 'filter',
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name,
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value,
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valueType: typeof value,
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key,
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});
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return this._reference;
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}
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/**
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*
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* @return {[*]}
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*/
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getModifiers(): Array<DatabaseModifier> {
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return [...this.modifiers];
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}
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/**
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*
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* @return {*}
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*/
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queryIdentifier() {
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// sort modifiers to enforce ordering
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const sortedModifiers = this.getModifiers().sort((a, b) => {
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if (a.id < b.id) return -1;
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if (a.id > b.id) return 1;
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return 0;
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});
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// Convert modifiers to unique key
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let key = '{';
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for (let i = 0; i < sortedModifiers.length; i++) {
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if (i !== 0) key += ',';
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key += sortedModifiers[i].id;
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}
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key += '}';
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return key;
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}
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}
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