swaf/dist/db/Query.js

var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
    function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
    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) : adopt(result.value).then(fulfilled, rejected); }
        step((generator = generator.apply(thisArg, _arguments || [])).next());
    });
};
import { query } from "./MysqlConnectionManager";
export default class Query {
    constructor(type, table, fields) {
        this._where = [];
        this._foundRows = false;
        this.type = type;
        this.table = table;
        this.fields = fields || [];
    }
    static select(table, ...fields) {
        return new Query(QueryType.SELECT, table, fields.length > 0 ? fields : ['*']);
    }
    static update(table, data) {
        const fields = [];
        for (let key in data) {
            if (data.hasOwnProperty(key)) {
                fields.push(new UpdateFieldValue(key, data[key]));
            }
        }
        return new Query(QueryType.UPDATE, table, fields);
    }
    static delete(table) {
        return new Query(QueryType.DELETE, table);
    }
    where(field, value, operator = WhereOperator.AND, test = WhereTest.EQUALS) {
        this._where.push(new WhereFieldValue(field, value, operator, test));
        return this;
    }
    whereNot(field, value, operator = WhereOperator.AND) {
        return this.where(field, value, operator, WhereTest.DIFFERENT);
    }
    orWhere(field, value) {
        return this.where(field, value, WhereOperator.OR);
    }
    whereIn(field, value) {
        return this.where(field, value, WhereOperator.AND, WhereTest.IN);
    }
    limit(limit, offset = 0) {
        this._limit = limit;
        this._offset = offset;
        return this;
    }
    first() {
        return this.limit(1);
    }
    sortBy(field, direction = 'ASC') {
        this._sortBy = field;
        this._sortDirection = direction;
        return this;
    }
    withTotalRowCount() {
        this._foundRows = true;
        return this;
    }
    toString(final = false) {
        var _a;
        let query = '';
        let fields = (_a = this.fields) === null || _a === void 0 ? void 0 : _a.join(',');
        let where = '';
        if (this._where.length > 0) {
            where = `WHERE ${this._where[0]}`;
            for (let i = 1; i < this._where.length; i++) {
                where += this._where[i].toString(false);
            }
        }
        let limit = '';
        if (typeof this._limit === 'number') {
            limit = `LIMIT ${this._limit}`;
            if (typeof this._offset === 'number' && this._offset !== 0) {
                limit += ` OFFSET ${this._offset}`;
            }
        }
        let orderBy = '';
        if (typeof this._sortBy === 'string') {
            orderBy = `ORDER BY ${this._sortBy} ${this._sortDirection}`;
        }
        switch (this.type) {
            case QueryType.SELECT:
                query = `SELECT ${this._foundRows ? 'SQL_CALC_FOUND_ROWS' : ''} ${fields} FROM ${this.table} ${where} ${orderBy} ${limit}`;
                break;
            case QueryType.UPDATE:
                query = `UPDATE ${this.table} SET ${fields} ${where} ${orderBy} ${limit}`;
                break;
            case QueryType.DELETE:
                query = `DELETE FROM ${this.table} ${where} ${orderBy} ${limit}`;
                break;
        }
        return final ? query : `(${query})`;
    }
    build() {
        return this.toString(true);
    }
    get variables() {
        var _a;
        const variables = [];
        (_a = this.fields) === null || _a === void 0 ? void 0 : _a.filter(v => v instanceof FieldValue).flatMap(v => v.variables).forEach(v => variables.push(v));
        this._where.flatMap(v => v.variables)
            .forEach(v => variables.push(v));
        return variables;
    }
    isCacheable() {
        return this.type === QueryType.SELECT && this.fields.length === 1 && this.fields[0] === '*';
    }
    execute(connection) {
        return __awaiter(this, void 0, void 0, function* () {
            const queryResult = yield query(this.build(), this.variables, connection);
            if (this._foundRows) {
                const foundRows = yield query('SELECT FOUND_ROWS() as r', undefined, connection);
                queryResult.foundRows = foundRows.results[0].r;
            }
            return queryResult;
        });
    }
}
export var QueryType;
(function (QueryType) {
    QueryType[QueryType["SELECT"] = 0] = "SELECT";
    QueryType[QueryType["UPDATE"] = 1] = "UPDATE";
    QueryType[QueryType["DELETE"] = 2] = "DELETE";
})(QueryType || (QueryType = {}));
var WhereOperator;
(function (WhereOperator) {
    WhereOperator["AND"] = "AND";
    WhereOperator["OR"] = "OR";
})(WhereOperator || (WhereOperator = {}));
var WhereTest;
(function (WhereTest) {
    WhereTest["EQUALS"] = "=";
    WhereTest["DIFFERENT"] = "!=";
    WhereTest["IN"] = " IN ";
})(WhereTest || (WhereTest = {}));
class FieldValue {
    constructor(field, value) {
        this.field = field;
        this.value = value;
    }
    toString(first = true) {
        return `${!first ? ',' : ''}${this.field}${this.test}${this.value instanceof Query ? this.value : (Array.isArray(this.value) ? '(?)' : '?')}`;
    }
    get test() {
        return '=';
    }
    get variables() {
        return this.value instanceof Query ? this.value.variables : [this.value];
    }
}
class SelectFieldValue extends FieldValue {
    toString(first = true) {
        return `(${this.value instanceof Query ? this.value : '?'}) AS ${this.field}`;
    }
}
class UpdateFieldValue extends FieldValue {
}
class WhereFieldValue extends FieldValue {
    constructor(field, value, operator, test) {
        super(field, value);
        this.operator = operator;
        this._test = test;
    }
    toString(first = true) {
        return (!first ? ` ${this.operator} ` : '') + super.toString(true);
    }
    get test() {
        return this._test;
    }
}
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