simplyfire
Version:
A lightweight firestore api for firebase cloud functions & Angular.
91 lines • 12.8 kB
JavaScript
export class QueryBuilder {
constructor() {
this._where = [];
this._orderBy = [];
this._leftJoins = [];
}
get joins() {
return this._leftJoins;
}
where(...where) {
this._where.push(where);
return this;
}
orderBy(...orderBy) {
this._orderBy.push(orderBy);
return this;
}
leftJoin(...leftJoin) {
this._leftJoins.push(leftJoin);
}
limit(limit) {
this._limit = limit;
return this;
}
limitToLast(limitToLast) {
this._limitToLast = limitToLast;
return this;
}
startAt(...startAt) {
this._startAt = startAt;
return this;
}
startAfter(...startAfter) {
this._startAfter = startAfter;
return this;
}
endAt(...endAt) {
this._endAt = endAt;
return this;
}
endBefore(...endBefore) {
this._endBefore = endBefore;
return this;
}
// Still have to use <any> type due to most interfaces of @google-cloud/firestore
// are not compatible with @firebase/firestore's interfaces.
exec(ref, queryOps) {
if (typeof window === 'undefined') {
return this.execQueryForCloud(ref);
}
if (!queryOps) {
throw Error('invalid arguments');
}
const { query, where, orderBy, limit, limitToLast, startAt, startAfter, endAt, endBefore } = queryOps;
const queryConstraints = [
...this._where.map((w) => where(...w)),
...this._orderBy.map((o) => orderBy(...o)),
...(this._limit ? [limit(this._limit)] : []),
...(this._limitToLast ? [limitToLast(this._limitToLast)] : []),
...(this._startAt?.every((i) => !!i) ? [startAt(...this._startAt)] : []),
...(this._startAfter?.every((i) => !!i) ? [startAfter(...this._startAfter)] : []),
...(this._endAt?.every((i) => !!i) ? [endAt(...this._endAt)] : []),
...(this._endBefore?.every((i) => !!i) ? [endBefore(...this._endBefore)] : [])
];
return query(ref, ...queryConstraints);
}
execQueryForCloud(ref) {
let query = this._where.reduce((q, wh) => q.where(...wh), ref);
query = this._orderBy.reduce((q, ob) => q.orderBy(...ob), query);
if (this._limit) {
query = query.limit(this._limit);
}
if (this._limitToLast) {
query = query.limitToLast(this._limitToLast);
}
if (this._startAt) {
query = query.startAt(this._startAt);
}
if (this._startAfter) {
query = query.startAfter(this._startAfter);
}
if (this._endAt) {
query = query.endAt(this._endAt);
}
if (this._endBefore) {
query = query.endBefore(this._endBefore);
}
return query;
}
}
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type {\n  CollectionReference,\n  DocumentData,\n  DocumentSnapshot,\n  FieldPath,\n  OrderByDirection,\n  Query,\n  WhereFilterOp\n} from '@firebase/firestore-types';\n\ntype QueryWhere = [fieldPath: string | FieldPath, opStr: WhereFilterOp, value: unknown];\ntype QueryOrderBy = [fieldPath: string | FieldPath, directionStr?: OrderByDirection];\ntype QueryLeftJoin = [idField: string, collection: string, alias: string];\ntype QueryCursor = [snapshot: DocumentSnapshot<unknown>] | unknown[];\n\ndeclare const window: any;\n\nexport class QueryBuilder {\n  private _where: QueryWhere[] = [];\n  private _orderBy: QueryOrderBy[] = [];\n  private _leftJoins: QueryLeftJoin[] = [];\n  private _limit?: number;\n  private _limitToLast?: number;\n  private _startAt?: QueryCursor;\n  private _startAfter?: QueryCursor;\n  private _endAt?: QueryCursor;\n  private _endBefore?: QueryCursor;\n\n  get joins() {\n    return this._leftJoins;\n  }\n\n  where(...where: QueryWhere) {\n    this._where.push(where);\n\n    return this;\n  }\n\n  orderBy(...orderBy: QueryOrderBy) {\n    this._orderBy.push(orderBy);\n\n    return this;\n  }\n\n  leftJoin(...leftJoin: QueryLeftJoin) {\n    this._leftJoins.push(leftJoin);\n  }\n\n  limit(limit: number) {\n    this._limit = limit;\n    return this;\n  }\n\n  limitToLast(limitToLast: number) {\n    this._limitToLast = limitToLast;\n    return this;\n  }\n\n  startAt(...startAt: QueryCursor) {\n    this._startAt = startAt;\n    return this;\n  }\n\n  startAfter(...startAfter: QueryCursor) {\n    this._startAfter = startAfter;\n    return this;\n  }\n\n  endAt(...endAt: QueryCursor) {\n    this._endAt = endAt;\n    return this;\n  }\n\n  endBefore(...endBefore: QueryCursor) {\n    this._endBefore = endBefore;\n    return this;\n  }\n\n  // Still have to use <any> type due to most interfaces of @google-cloud/firestore\n  // are not compatible with @firebase/firestore's interfaces.\n  exec(ref: CollectionReference<DocumentData> | any, queryOps?: { [key: string]: any }): Query<DocumentData> | any {\n    if (typeof window === 'undefined') {\n      return this.execQueryForCloud(ref);\n    }\n\n    if (!queryOps) {\n      throw Error('invalid arguments');\n    }\n\n    const { query, where, orderBy, limit, limitToLast, startAt, startAfter, endAt, endBefore } = queryOps;\n\n    const queryConstraints = [\n      ...this._where.map((w) => where(...w)),\n      ...this._orderBy.map((o) => orderBy(...o)),\n      ...(this._limit ? [limit(this._limit)] : []),\n      ...(this._limitToLast ? [limitToLast(this._limitToLast)] : []),\n      ...(this._startAt?.every((i) => !!i) ? [startAt(...this._startAt)] : []),\n      ...(this._startAfter?.every((i) => !!i) ? [startAfter(...this._startAfter)] : []),\n      ...(this._endAt?.every((i) => !!i) ? [endAt(...this._endAt)] : []),\n      ...(this._endBefore?.every((i) => !!i) ? [endBefore(...this._endBefore)] : [])\n    ];\n\n    return query(ref, ...queryConstraints);\n  }\n\n  private execQueryForCloud(ref: CollectionReference<DocumentData>): Query<DocumentData> {\n    let query = this._where.reduce((q, wh) => q.where(...wh), ref);\n    query = this._orderBy.reduce((q, ob) => q.orderBy(...ob), query);\n\n    if (this._limit) {\n      query = query.limit(this._limit);\n    }\n\n    if (this._limitToLast) {\n      query = query.limitToLast(this._limitToLast);\n    }\n\n    if (this._startAt) {\n      query = query.startAt(this._startAt);\n    }\n\n    if (this._startAfter) {\n      query = query.startAfter(this._startAfter);\n    }\n\n    if (this._endAt) {\n      query = query.endAt(this._endAt);\n    }\n\n    if (this._endBefore) {\n      query = query.endBefore(this._endBefore);\n    }\n\n    return query;\n  }\n}\n"]}