mongoose-infinite-pagination
Version:
It is used to paginate the bulk datas.
221 lines • 10.3 kB
JavaScript
;
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
return new (P || (P = Promise))(function (resolve, reject) {
function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
step((generator = generator.apply(thisArg, _arguments || [])).next());
});
};
var __generator = (this && this.__generator) || function (thisArg, body) {
var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;
return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
function verb(n) { return function (v) { return step([n, v]); }; }
function step(op) {
if (f) throw new TypeError("Generator is already executing.");
while (_) try {
if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;
if (y = 0, t) op = [op[0] & 2, t.value];
switch (op[0]) {
case 0: case 1: t = op; break;
case 4: _.label++; return { value: op[1], done: false };
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case 7: op = _.ops.pop(); _.trys.pop(); continue;
default:
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if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
}
};
Object.defineProperty(exports, "__esModule", { value: true });
var getUrls = function (opts) {
var limit = opts.limit;
var skip = opts.skip;
var url = opts.url;
var itemCount = opts.count;
var parameters = getUrlParameters(url);
url = Object.keys(parameters).length == 0 ? url += '?limit=&offset=' : url;
if (('limit' in parameters) && !('offset' in parameters)) {
url += '&offset=';
}
else if (!('limit' in parameters) && ('offset' in parameters)) {
url += '&limit=';
}
url = parameters['limit'] ? url : url.replace('limit=', ('limit=' + limit));
url = parameters['offset'] ? url : url.replace('offset=', ('offset=' + skip));
var next_url = null, prev_url = null;
var offset = limit + skip;
if (offset < itemCount) {
next_url = url.replace(('offset=' + skip), "offset=" + offset);
}
if (itemCount > 0 && skip > 0) {
var offset_1 = skip - limit;
prev_url = url.replace(('offset=' + skip), "offset=" + (offset_1 < 0 ? 0 : offset_1));
}
var result = {
count: itemCount,
next: next_url,
previous: prev_url,
results: []
};
return result;
};
var getUrlParameters = function (url) {
var vars = {};
var parts = url.replace(/[?&]+([^=&]+)=([^&]*)/gi, function (m, key, value) {
vars[key] = value;
return "";
});
return vars;
};
function paginate(schema, opts) {
var self = paginate;
opts = Object.assign({}, (self.options || {}), opts);
var defaultLimit = (opts ? (opts.defaultLimit ? opts.defaultLimit : 10) : 10);
var defaultSkip = (opts ? (opts.defaultSkip ? opts.defaultSkip : 0) : 0);
var result;
schema.statics.aggregatePaginate = function (pipelines, options, callback) {
var _this = this;
return new Promise(function (resolve, reject) { return __awaiter(_this, void 0, void 0, function () {
var paginateOpts, itemCount, err_1;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
paginateOpts = {};
if (options && options.req) {
paginateOpts = {
url: options.req.protocol + ((options.is_secure ? 's' : '') + "://") + options.req.get('host') + options.req.originalUrl,
limit: parseInt(options.limit || defaultLimit),
skip: parseInt(options.skip || defaultSkip),
count: 0
};
}
itemCount = 0;
_a.label = 1;
case 1:
_a.trys.push([1, 3, , 4]);
return [4 /*yield*/, this.aggregate(pipelines).count('count')];
case 2:
itemCount = _a.sent();
return [3 /*break*/, 4];
case 3:
err_1 = _a.sent();
if (callback) {
callback(err_1, null);
}
return [2 /*return*/, reject(err_1)];
case 4:
if (itemCount && itemCount[0]) {
itemCount = itemCount[0].count;
}
else {
itemCount = 0;
}
if (paginateOpts && paginateOpts.url) {
pipelines.push({ '$skip': paginateOpts.skip });
pipelines.push({ '$limit': paginateOpts.limit });
}
paginateOpts.count = itemCount;
result = getUrls(paginateOpts);
if (itemCount == 0) {
if (callback) {
callback(null, result);
}
return [2 /*return*/, resolve(result)];
}
this
.aggregate(pipelines)
.exec(function (err, querySet) {
result.results = querySet;
if (callback) {
if (err) {
result = null;
}
callback(err, result);
}
if (err)
return reject(err);
resolve(result);
});
return [2 /*return*/];
}
});
}); });
};
var Paginate = /** @class */ (function () {
function Paginate() {
}
Paginate.findWithPaginate = function (query, options, callback) {
var _this = this;
var self = this;
return new Promise(function (resolve, reject) { return __awaiter(_this, void 0, void 0, function () {
var paginateOpts, itemCount;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
paginateOpts = {};
if (options && options.req) {
paginateOpts = {
url: options.req.protocol + ((options.is_secure ? 's' : '') + "://") + options.req.get('host') + options.req.originalUrl,
limit: parseInt(options.limit || defaultLimit),
skip: parseInt(options.skip || defaultSkip),
count: 0
};
}
return [4 /*yield*/, self.countDocuments(query)];
case 1:
itemCount = _a.sent();
paginateOpts.count = itemCount;
result = getUrls(paginateOpts);
self
.find(query)
.select(self.selectOpts)
.populate(self.populateOpts)
.sort(self.sortOpts)
.skip(paginateOpts.skip)
.limit(paginateOpts.limit)
.exec(function (err, querySet) {
result.results = querySet;
if (callback) {
if (err) {
result = null;
}
callback(err, result);
}
if (err)
return reject(err);
resolve(result);
});
return [2 /*return*/];
}
});
}); });
};
Paginate.paginateSelect = function (opts) {
this.selectOpts = opts;
return this;
};
Paginate.paginatePopulate = function (opts) {
this.populateOpts = opts;
return this;
};
Paginate.paginateSort = function (opts) {
this.sortOpts = opts;
return this;
};
Paginate.selectOpts = '';
Paginate.populateOpts = '';
Paginate.sortOpts = '';
return Paginate;
}());
schema.loadClass(Paginate);
}
exports.paginate = paginate;
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