365 lines
12 KiB
C#
365 lines
12 KiB
C#
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using System;
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using System.Linq;
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using System.Collections;
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using System.Collections.Generic;
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using System.Threading.Tasks;
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using LeanCloud.Storage.Internal.Query;
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using LeanCloud.Storage.Internal.Object;
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namespace LeanCloud.Storage {
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/// <summary>
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/// 查询类
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/// </summary>
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/// <typeparam name="T"></typeparam>
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public class LCQuery<T> where T : LCObject {
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public string ClassName {
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get; private set;
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}
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LCCompositionalCondition condition;
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public LCQuery(string className) {
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ClassName = className;
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condition = new LCCompositionalCondition();
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}
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/// <summary>
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/// 等于
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/// </summary>
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/// <param name="key"></param>
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/// <param name="value"></param>
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/// <returns></returns>
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public LCQuery<T> WhereEqualTo(string key, object value) {
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condition.WhereEqualTo(key, value);
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return this;
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}
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/// <summary>
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/// 不等于
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/// </summary>
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/// <param name="key"></param>
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/// <param name="value"></param>
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/// <returns></returns>
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public LCQuery<T> WhereNotEqualTo(string key, object value) {
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condition.WhereNotEqualTo(key, value);
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return this;
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}
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/// <summary>
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/// 包含
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/// </summary>
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/// <param name="key"></param>
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/// <param name="values"></param>
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/// <returns></returns>
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public LCQuery<T> WhereContainedIn(string key, IEnumerable values) {
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condition.WhereContainedIn(key, values);
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return this;
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}
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/// <summary>
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/// 包含全部
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/// </summary>
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/// <param name="key"></param>
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/// <param name="values"></param>
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/// <returns></returns>
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public LCQuery<T> WhereContainsAll(string key, IEnumerable values) {
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condition.WhereContainsAll(key, values);
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return this;
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}
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/// <summary>
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/// 存在
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/// </summary>
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/// <param name="key"></param>
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/// <returns></returns>
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public LCQuery<T> WhereExists(string key) {
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condition.WhereExists(key);
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return this;
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}
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/// <summary>
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/// 不存在
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/// </summary>
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/// <param name="key"></param>
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/// <returns></returns>
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public LCQuery<T> WhereDoesNotExist(string key) {
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condition.WhereDoesNotExist(key);
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return this;
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}
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/// <summary>
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/// 长度等于
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/// </summary>
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/// <param name="key"></param>
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/// <param name="size"></param>
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/// <returns></returns>
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public LCQuery<T> WhereSizeEqualTo(string key, int size) {
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condition.WhereSizeEqualTo(key, size);
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return this;
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}
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/// <summary>
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/// 大于
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/// </summary>
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/// <param name="key"></param>
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/// <param name="value"></param>
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/// <returns></returns>
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public LCQuery<T> WhereGreaterThan(string key, object value) {
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condition.WhereGreaterThan(key, value);
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return this;
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}
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/// <summary>
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/// 大于等于
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/// </summary>
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/// <param name="key"></param>
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/// <param name="value"></param>
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/// <returns></returns>
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public LCQuery<T> WhereGreaterThanOrEqualTo(string key, object value) {
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condition.WhereGreaterThanOrEqualTo(key, value);
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return this;
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}
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/// <summary>
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/// 小于
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/// </summary>
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/// <param name="key"></param>
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/// <param name="value"></param>
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/// <returns></returns>
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public LCQuery<T> WhereLessThan(string key, object value) {
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condition.WhereLessThan(key, value);
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return this;
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}
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/// <summary>
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/// 小于等于
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/// </summary>
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/// <param name="key"></param>
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/// <param name="value"></param>
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/// <returns></returns>
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public LCQuery<T> WhereLessThanOrEqualTo(string key, object value) {
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condition.WhereLessThanOrEqualTo(key, value);
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return this;
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}
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/// <summary>
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/// 相邻
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/// </summary>
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/// <param name="key"></param>
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/// <param name="point"></param>
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/// <returns></returns>
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public LCQuery<T> WhereNear(string key, LCGeoPoint point) {
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condition.WhereNear(key, point);
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return this;
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}
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/// <summary>
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/// 在坐标区域内
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/// </summary>
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/// <param name="key"></param>
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/// <param name="southwest"></param>
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/// <param name="northeast"></param>
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/// <returns></returns>
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public LCQuery<T> WhereWithinGeoBox(string key, LCGeoPoint southwest, LCGeoPoint northeast) {
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condition.WhereWithinGeoBox(key, southwest, northeast);
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return this;
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}
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/// <summary>
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/// 相关
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/// </summary>
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/// <param name="parent"></param>
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/// <param name="key"></param>
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/// <returns></returns>
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public LCQuery<T> WhereRelatedTo(LCObject parent, string key) {
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condition.WhereRelatedTo(parent, key);
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return this;
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}
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/// <summary>
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/// 前缀
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/// </summary>
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/// <param name="key"></param>
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/// <param name="prefix"></param>
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/// <returns></returns>
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public LCQuery<T> WhereStartsWith(string key, string prefix) {
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condition.WhereStartsWith(key, prefix);
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return this;
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}
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/// <summary>
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/// 后缀
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/// </summary>
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/// <param name="key"></param>
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/// <param name="suffix"></param>
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/// <returns></returns>
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public LCQuery<T> WhereEndsWith(string key, string suffix) {
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condition.WhereEndsWith(key, suffix);
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return this;
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}
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/// <summary>
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/// 字符串包含
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/// </summary>
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/// <param name="key"></param>
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/// <param name="subString"></param>
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/// <returns></returns>
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public LCQuery<T> WhereContains(string key, string subString) {
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condition.WhereContains(key, subString);
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return this;
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}
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/// <summary>
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/// 按 key 升序
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/// </summary>
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/// <param name="key"></param>
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/// <returns></returns>
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public LCQuery<T> OrderBy(string key) {
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condition.OrderBy(key);
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return this;
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}
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/// <summary>
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/// 按 key 降序
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/// </summary>
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/// <param name="key"></param>
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/// <returns></returns>
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public LCQuery<T> OrderByDescending(string key) {
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condition.OrderByDescending(key);
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return this;
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}
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/// <summary>
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/// 拉取 key 的完整对象
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/// </summary>
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/// <param name="key"></param>
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/// <returns></returns>
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public LCQuery<T> Include(string key) {
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condition.Include(key);
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return this;
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}
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/// <summary>
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/// 包含 key
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/// </summary>
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/// <param name="key"></param>
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/// <returns></returns>
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public LCQuery<T> Select(string key) {
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condition.Select(key);
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return this;
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}
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/// <summary>
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/// 跳过
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/// </summary>
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/// <param name="value"></param>
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/// <returns></returns>
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public LCQuery<T> Skip(int value) {
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condition.Skip = value;
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return this;
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}
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/// <summary>
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/// 限制数量
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/// </summary>
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/// <param name="value"></param>
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/// <returns></returns>
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public LCQuery<T> Limit(int value) {
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condition.Limit = value;
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return this;
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}
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public async Task<int> Count() {
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string path = $"classes/{ClassName}";
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Dictionary<string, object> parameters = BuildParams();
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parameters["limit"] = 0;
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parameters["count"] = 1;
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Dictionary<string, object> ret = await LeanCloud.HttpClient.Get<Dictionary<string, object>>(path, queryParams: parameters);
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return (int)ret["count"];
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}
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public async Task<T> Get(string objectId) {
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if (string.IsNullOrEmpty(objectId)) {
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throw new ArgumentNullException(nameof(objectId));
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}
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WhereEqualTo("objectId", objectId);
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Limit(1);
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List<T> results = await Find();
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if (results != null) {
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if (results.Count == 0) {
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return null;
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}
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return results[0];
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}
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return null;
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}
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public async Task<List<T>> Find() {
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string path = $"classes/{ClassName}";
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Dictionary<string, object> parameters = BuildParams();
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Dictionary<string, object> response = await LeanCloud.HttpClient.Get<Dictionary<string, object>>(path, queryParams: parameters);
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List<object> results = response["results"] as List<object>;
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List<T> list = new List<T>();
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foreach (object item in results) {
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LCObjectData objectData = LCObjectData.Decode(item as Dictionary<string, object>);
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T obj = LCObject.Create(ClassName) as T;
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obj.Merge(objectData);
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list.Add(obj);
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}
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return list;
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}
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public async Task<T> First() {
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Limit(1);
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List<T> results = await Find();
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if (results != null && results.Count > 0) {
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return results[0];
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}
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return null;
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}
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public static LCQuery<T> And(IEnumerable<LCQuery<T>> queries) {
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if (queries == null || queries.Count() < 1) {
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throw new ArgumentNullException(nameof(queries));
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}
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LCQuery<T> compositionQuery = new LCQuery<T>(null);
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string className = null;
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foreach (LCQuery<T> query in queries) {
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if (className != null && className != query.ClassName) {
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throw new Exception("All of the queries in an or query must be on the same class.");
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}
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className = query.ClassName;
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compositionQuery.condition.Add(query.condition);
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}
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compositionQuery.ClassName = className;
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return compositionQuery;
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}
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public static LCQuery<T> Or(IEnumerable<LCQuery<T>> queries) {
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if (queries == null || queries.Count() < 1) {
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throw new ArgumentNullException(nameof(queries));
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}
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LCQuery<T> compositionQuery = new LCQuery<T>(null);
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compositionQuery.condition = new LCCompositionalCondition(LCCompositionalCondition.Or);
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string className = null;
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foreach (LCQuery<T> query in queries) {
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if (className != null && className != query.ClassName) {
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throw new Exception("All of the queries in an or query must be on the same class.");
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}
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className = query.ClassName;
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compositionQuery.condition.Add(query.condition);
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}
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compositionQuery.ClassName = className;
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return compositionQuery;
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}
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Dictionary<string, object> BuildParams() {
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return condition.BuildParams();
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}
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internal string BuildWhere() {
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return condition.BuildWhere();
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}
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}
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}
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