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| import { Request } from "./request";
import { OrderByDirection } from "./constant";
import { Db } from "./db";
import { Validate } from "./validate";
import { Util } from "./util";
import { Command } from "./command";
import { RegExp } from "./regexp";
import * as isRegExp from "is-regex";
interface getRes {
data: any[];
requestId: string;
total: number;
limit: number;
offset: number;
}
interface QueryOrder {
field?: string;
direction?: "asc" | "desc";
}
interface QueryOption {
// 查询数量
limit?: number;
// 偏移量
offset?: number;
// 指定显示或者不显示哪些字段
projection?: Object;
}
/**
* 查询模块
*
* @author haroldhu
*/
export class Query {
/**
* Db 的引用
*
* @internal
*/
protected _db: Db;
/**
* Collection name
*
* @internal
*/
protected _coll: string;
/**
* 过滤条件
*
* @internal
*/
private _fieldFilters: Object;
/**
* 排序条件
*
* @internal
*/
private _fieldOrders: QueryOrder[];
/**
* 查询条件
*
* @internal
*/
private _queryOptions: QueryOption;
/**
* 请求实例
*
* @internal
*/
private _request: Request;
/**
* 初始化
*
* @internal
*
* @param db - 数据库的引用
* @param coll - 集合名称
* @param fieldFilters - 过滤条件
* @param fieldOrders - 排序条件
* @param queryOptions - 查询条件
*/
constructor(
db: Db,
coll: string,
fieldFilters?: Object,
fieldOrders?: QueryOrder[],
queryOptions?: QueryOption
) {
this._db = db;
this._coll = coll;
this._fieldFilters = fieldFilters;
this._fieldOrders = fieldOrders || [];
this._queryOptions = queryOptions || {};
this._request = new Request(this._db);
}
/**
* 发起请求获取文档列表
*
* - 默认获取集合下全部文档数据
* - 可以把通过 `orderBy`、`where`、`skip`、`limit`设置的数据添加请求参数上
*/
get(): Promise<getRes> {
let newOder = [];
Eif (this._fieldOrders) {
this._fieldOrders.forEach(order => {
newOder.push(order);
});
}
interface Param {
collectionName: string;
query?: Object;
order?: string[];
offset?: number;
limit?: number;
projection?: Object;
}
let param: Param = {
collectionName: this._coll
};
if (this._fieldFilters) {
param.query = this._fieldFilters;
}
if (newOder.length > 0) {
param.order = newOder;
}
if (this._queryOptions.offset) {
param.offset = this._queryOptions.offset;
}
if (this._queryOptions.limit) {
param.limit =
this._queryOptions.limit < 100 ? this._queryOptions.limit : 100;
} else {
param.limit = 100;
}
if (this._queryOptions.projection) {
param.projection = this._queryOptions.projection;
}
// console.log("this._queryOptions", this._queryOptions);
// console.log(param);
return new Promise<any>(resolve => {
this._request.send("queryDocument", param).then(res => {
Iif (res.code) {
resolve(res);
} else {
const documents = Util.formatResDocumentData(res.data.list);
const result: any = {
data: documents,
requestId: res.requestId
};
Iif (res.TotalCount) result.total = res.TotalCount;
Iif (res.Limit) result.limit = res.Limit;
Iif (res.Offset) result.offset = res.Offset;
resolve(result);
}
});
});
}
/**
* 获取总数
*/
count() {
interface Param {
collectionName: string;
query?: Object;
}
let param: Param = {
collectionName: this._coll
};
if (this._fieldFilters) {
param.query = this._fieldFilters;
}
return new Promise<any>(resolve => {
this._request.send("countDocument", param).then(res => {
// console.log(res);
if (res.code) {
resolve(res);
} else {
resolve({
requestId: res.requestId,
total: res.data.total
});
}
});
});
}
/**
* 查询条件
*
* @param query
*/
where(query: object) {
return new Query(
this._db,
this._coll,
this.convertParams(query),
this._fieldOrders,
this._queryOptions
);
}
/**
* 设置排序方式
*
* @param fieldPath - 字段路径
* @param directionStr - 排序方式
*/
orderBy(fieldPath: string, directionStr: OrderByDirection): Query {
Validate.isFieldPath(fieldPath);
Validate.isFieldOrder(directionStr);
const newOrder: QueryOrder = {
field: fieldPath,
direction: directionStr
};
const combinedOrders = this._fieldOrders.concat(newOrder);
return new Query(
this._db,
this._coll,
this._fieldFilters,
combinedOrders,
this._queryOptions
);
}
/**
* 设置查询条数
*
* @param limit - 限制条数
*/
limit(limit: number): Query {
Validate.isInteger("limit", limit);
let option = Object.assign({}, this._queryOptions);
option.limit = limit;
return new Query(
this._db,
this._coll,
this._fieldFilters,
this._fieldOrders,
option
);
}
/**
* 设置偏移量
*
* @param offset - 偏移量
*/
skip(offset: number): Query {
Validate.isInteger("offset", offset);
let option = Object.assign({}, this._queryOptions);
option.offset = offset;
return new Query(
this._db,
this._coll,
this._fieldFilters,
this._fieldOrders,
option
);
}
/**
* 发起请求批量更新文档
*
* @param data 数据
*/
update(data: Object): Promise<any> {
Iif (!data || typeof data !== "object") {
return Promise.resolve({
code: "INVALID_PARAM",
message: "参数必需是非空对象"
});
}
Iif (data.hasOwnProperty("_id")) {
return Promise.resolve({
code: "INVALID_PARAM",
message: "不能更新_id的值"
});
}
let param = {
collectionName: this._coll,
query: this._fieldFilters,
multi: true,
merge: true,
upsert: false,
data: Util.encodeDocumentDataForReq(data, true)
// data: this.convertParams(data)
};
return new Promise<any>(resolve => {
this._request.send("updateDocument", param).then(res => {
Iif (res.code) {
resolve(res);
} else {
resolve({
requestId: res.requestId,
updated: res.data.updated,
upsertId: res.data.upsert_id
});
}
});
});
}
/**
* 指定要返回的字段
*
* @param projection
*/
field(projection: Object): Query {
for (let k in projection) {
Eif (projection[k]) {
projection[k] = 1;
} else {
projection[k] = 0;
}
}
let option = Object.assign({}, this._queryOptions);
option.projection = projection;
return new Query(
this._db,
this._coll,
this._fieldFilters,
this._fieldOrders,
option
);
}
/**
* 条件删除文档
*/
remove() {
const param = {
collectionName: this._coll,
query: this._fieldFilters,
multi: true
};
// console.log("this._queryOptions", this._queryOptions);
// console.log(param);
return new Promise<any>(resolve => {
this._request.send("deleteDocument", param).then(res => {
// console.log(res)
Iif (res.code) {
resolve(res);
} else {
resolve({
requestId: res.requestId,
deleted: res.data.deleted
});
}
});
});
}
convertParams(query: object) {
// console.log(JSON.stringify(query));
let queryParam = {};
if (query instanceof Command) {
queryParam = query.parse();
} else {
for (let key in query) {
Eif (query[key] instanceof Command || query[key] instanceof RegExp) {
queryParam = Object.assign({}, queryParam, query[key].parse(key));
} else if (isRegExp(query[key])) {
queryParam = {
[key]: {
$regex: query[key].source,
$options: query[key].flags
}
};
} else if (typeof query[key] === "object") {
let command = new Command();
let tmp = {};
command.concatKeys({ [key]: query[key] }, "", tmp);
let keys = Object.keys(tmp)[0];
let value = tmp[keys];
if (value instanceof Command) {
value = value.parse(keys);
} else {
value = { [keys]: value };
}
queryParam = Object.assign({}, queryParam, value);
} else {
queryParam = Object.assign({}, queryParam, { [key]: query[key] });
}
}
}
// console.log(JSON.stringify(queryParam));
return queryParam;
}
}
|