access-db
Version:
[统一数据库的连接]Unified access to all kinds of databases
314 lines (313 loc) • 14.9 kB
JavaScript
;
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
const dbMysql_1 = require("../utils/dbMysql");
const constants_1 = require("../constants/constants");
const error_1 = require("../constants/error");
const findTrans_1 = __importDefault(require("../utils/findTrans"));
const timeHash_1 = __importDefault(require("../utils/timeHash"));
const utils_1 = require("../utils/utils");
function fetchFind(table, params = {}, query) {
if (!table)
throw new Error(error_1.PARAM_TABLE_ERROR);
return new Promise((resolve, reject) => {
let tableList = table.toString().replace(/\s*/g, '').split(',');
let tableHash = {}, tableMain = tableList[0];
let joinList = [], joinJnameList = [], // 所有j*名字
joinJ = [], // 所有j
joinJObj = {}; //对应joinList的j*: name名字
for (let j = 0; j < constants_1.J_MAX; j++) {
if (params[`j${j}`]) {
let t1 = params[`j${j}`][0].split('.');
let t2 = params[`j${j}`][2] ? params[`j${j}`][2].split('.') : '';
if (t1.length === 1) {
t1[0] = tableMain;
}
if (t2.length === 1) {
t2[0] = tableMain;
}
if (t1[0] === t2[0]) {
t2[0] = `j${j}` + t2[0]; // 1，2名字相同，则重命名
}
let index = joinList.indexOf(t2[0]);
if (index > -1) {
t2[0] = `j${j}` + t2[0]; // 2，2名字相同，则重命名
joinList[index] = joinJnameList[index]; //同时将之前的怀重新命名
joinJObj[joinJ[index]] = joinJnameList[index]; //同时将之前的怀重新命名
}
if (tableList.indexOf(t1[0]) === -1 && tableMain !== t1[0]) {
tableList.push(t1[0]);
}
if (['inner', 'left', 'right', 'full'].indexOf(params[`j${j}`][1]) > -1) {
if (t2[0] === `j${j}`)
throw new Error(error_1.FIND_J_JOIN_ERROR);
if (joinList.indexOf(t2[0]) === -1 && tableMain !== t2[0]) {
joinList.push(t2[0]);
joinJObj[`j${j}`] = t2[0];
joinJ.push(`j${j}`);
joinJnameList.push(`j${j}` + t2[0]);
}
}
}
}
let alltable = [...tableList, ...joinList]; //使用到的table，都要列出来
let des = [];
for (let i = 0; i < alltable.length; i++) {
if (!tableHash[alltable[i]]) {
if (tableList.indexOf(alltable[i]) > -1) {
let tempHash = (0, timeHash_1.default)();
tableHash[alltable[i]] = tempHash;
if (joinList.indexOf(alltable[i]) === -1) {
des.push(`${alltable[i]} AS ${tempHash}`);
}
}
else {
tableHash[alltable[i]] = alltable[i];
}
}
}
let joinDes = '', jObj = {}, jTable = {}, jUniqueTable = [], jNum = 0;
for (let j = 0; j < constants_1.J_MAX; j++) {
if (params[`j${j}`]) {
let t1 = params[`j${j}`][0].split('.');
if (t1.length === 1) {
t1.push(t1[0]);
t1[0] = tableMain;
}
let t2 = [''];
if (params[`j${j}`][2]) {
if (params[`j${j}`][2].indexOf('SELECT') > -1) {
t2 = [`(${params[`j${j}`][2]})`];
}
else {
t2 = params[`j${j}`][2].split('.');
}
}
switch (params[`j${j}`][1]) {
case 'uniqueTable':
jUniqueTable.push(params[`j${j}`][0]);
break;
case 'tableOf':
jTable[`${params[`j${j}`][0]}`] = t2[0];
break;
case 'inner':
if (t2.length === 1) {
t2.push(t2[0]);
t2[0] = tableMain;
}
joinDes = joinDes + ` INNER JOIN ${t2[0]} AS ${tableHash[joinJObj[`j${j}`]]} ON ${tableHash[t1[0]]}.${t1[1]} = ${tableHash[joinJObj[`j${j}`]]}.${t2[1]}`;
break;
case 'left':
if (t2.length === 1) {
t2.push(t2[0]);
t2[0] = tableMain;
}
joinDes = joinDes + ` LEFT JOIN ${t2[0]} AS ${tableHash[joinJObj[`j${j}`]]} ON ${tableHash[t1[0]]}.${t1[1]} = ${tableHash[joinJObj[`j${j}`]]}.${t2[1]}`;
break;
case 'right':
if (t2.length === 1) {
t2.push(t2[0]);
t2[0] = tableMain;
}
joinDes = joinDes + ` RIGHT JOIN ${t2[0]} AS ${tableHash[joinJObj[`j${j}`]]} ON ${tableHash[t1[0]]}.${t1[1]} = ${tableHash[joinJObj[`j${j}`]]}.${t2[1]}`;
break;
case 'full':
if (t2.length === 1) {
t2.push(t2[0]);
t2[0] = tableMain;
}
joinDes = joinDes + ` FULL JOIN ${t2[0]} AS ${tableHash[joinJObj[`j${j}`]]} ON ${tableHash[t1[0]]}.${t1[1]} = ${tableHash[joinJObj[`j${j}`]]}.${t2[1]}`;
break;
case 'count':
if (params[`j${j}`][2] === 'distinct') {
jObj[`j${j}`] = t1[1] === '*' ? `COUNT(DISTINCT ${t1[1]})` : `COUNT(DISTINCT ${tableHash[t1[0]]}.${t1[1]})`;
}
else {
jObj[`j${j}`] = t1[1] === '*' ? `COUNT(${t1[1]})` : `COUNT(${tableHash[t1[0]]}.${t1[1]})`;
}
break;
case 'sum':
if (params[`j${j}`][2] === 'distinct') {
jObj[`j${j}`] = `SUM(DISTINCT ${tableHash[t1[0]]}.${t1[1]})`;
}
else {
jObj[`j${j}`] = `SUM(${tableHash[t1[0]]}.${t1[1]})`;
}
break;
case 'max':
if (params[`j${j}`][2] === 'distinct') {
jObj[`j${j}`] = `MAX(DISTINCT ${tableHash[t1[0]]}.${t1[1]})`;
}
else {
jObj[`j${j}`] = `MAX(${tableHash[t1[0]]}.${t1[1]})`;
}
break;
case 'min':
if (params[`j${j}`][2] === 'distinct') {
jObj[`j${j}`] = `MIN(DISTINCT ${tableHash[t1[0]]}.${t1[1]})`;
}
else {
jObj[`j${j}`] = `MIN(${tableHash[t1[0]]}.${t1[1]})`;
}
break;
case 'avg':
if (params[`j${j}`][2] === 'distinct') {
jObj[`j${j}`] = `AVG(DISTINCT ${tableHash[t1[0]]}.${t1[1]})`;
}
else {
jObj[`j${j}`] = `AVG(${tableHash[t1[0]]}.${t1[1]})`;
}
break;
case 'ucase':
jObj[`j${j}`] = `UCASE(${tableHash[t1[0]]}.${t1[1]})`;
break;
case 'lcase':
jObj[`j${j}`] = `LCASE(${tableHash[t1[0]]}.${t1[1]})`;
break;
case 'mid':
if (params[`j${j}`][3]) {
jObj[`j${j}`] = `MID(${tableHash[t1[0]]}.${t1[1]},${params[`j${j}`][2]},${params[`j${j}`][3]})`;
}
else if (params[`j${j}`][2]) {
jObj[`j${j}`] = `MID(${tableHash[t1[0]]}.${t1[1]},${params[`j${j}`][2]})`;
}
else {
jObj[`j${j}`] = `MID(${tableHash[t1[0]]}.${t1[1]},1)`;
}
break;
case 'len':
jObj[`j${j}`] = `LEN(${tableHash[t1[0]]}.${t1[1]})`;
break;
case 'round':
jObj[`j${j}`] = `ROUND(${tableHash[t1[0]]}.${t1[1]},${params[`j${j}`][2] || 0})`;
break;
case 'now':
jObj[`j${j}`] = `NOW()`;
break;
case 'format':
jObj[`j${j}`] = `FORMAT(${tableHash[t1[0]]}.${t1[1]},${params[`j${j}`][2]})`;
break;
default:
break;
}
}
}
let QQ = (0, findTrans_1.default)(params, 1, { tableHash: tableHash, tableMain: tableMain, table }, constants_1.PLATFORM_NAME.MYSQL);
let QQ2 = (0, findTrans_1.default)(params, 2, { tableHash: tableHash, tableMain: tableMain, jObj, table }, constants_1.PLATFORM_NAME.MYSQL);
let selectArr = [];
if (params.select) {
if (!(0, utils_1.isArray)(params.select))
throw new Error(error_1.SELECT_NOT_ARRAY);
for (let n = 0; n < params.select.length; n++) {
if (params.select[n].indexOf('SELECT') > -1) {
selectArr.push(`(${params.select[n]}) AS ${tableMain}_s${n}`);
}
else {
let jName = params.select[n].split(' ')[0];
if (constants_1.J_NAME_LIST.indexOf(jName) > -1) {
if (!params[jName])
throw new Error(error_1.FIND_NO_PJ_ERROR + jName);
let asJname = params.select[n];
if (params.select[n].indexOf(' as ') > -1) {
asJname = params.select[n].split(' as ')[1];
}
if (params.select[n].indexOf(' AS ') > -1) {
asJname = params.select[n].split(' AS ')[1];
}
selectArr.push(`${jObj[jName]} AS ${asJname}`);
}
else {
let tempS = params.select[n].split('.');
if (tempS.length === 1) {
selectArr.push(`${tableHash[tableMain]}.${tempS}`);
}
else {
selectArr.push(`${tableHash[tempS[0]]}.${tempS[1]}`);
}
}
}
}
}
else {
selectArr = ['*'];
}
let groupArr = []; //长度为1，只有一个
if (params.groupBy) {
let tempG = params.groupBy[0].split('.');
if (tempG.length === 1) {
groupArr.push(`${tableHash[tableMain]}.${tempG[0]}`);
}
else {
groupArr.push(`${tableHash[tempG[0]]}.${tempG[1]}`);
}
}
let orderArr = []; //
if (params.orderBy) {
if (!(0, utils_1.isArray)(params.orderBy))
throw new Error(error_1.ORDER_BY_NOT_ARRAY);
let temp = params.orderBy;
for (let i = 0; i < temp.length; i++) {
let tempG = temp[i], tempO;
if (tempG[0] === '-') {
tempO = tempG.substring(1).split('.');
orderArr.push(`${tempO.length === 1 ? tempO[0] : tempO[1]} DESC`);
}
else {
tempO = tempG.split('.');
orderArr.push(`${tempO.length === 1 ? tempO[0] : tempO[1]} ASC`);
}
}
}
let sql = '';
sql = `SELECT ${selectArr.length > 0 ? selectArr.toString() + ' ' : '* '}`
+ `FROM ${des.toString()} `
+ `${joinDes} `
+ (QQ === 2 ? ' ' : `WHERE ${QQ} `)
+ (groupArr.length > 0 ? `GROUP BY ${groupArr.toString()} ` : ' ')
+ (QQ2 === 2 ? ' ' : `HAVING ${QQ2} `)
+ (orderArr.length > 0 ? `ORDER BY ${orderArr.toString()} ` : ' ')
+ ((params.limit || params.page) ? `LIMIT ${params.limit || 20} ` : ' ')
+ ((params.page || params.limit) ? `OFFSET ${(params.limit || 20) * ((params.page || 1) - 1)}` : '');
if (jUniqueTable.length > 0) {
//去掉重复命令的，以父查寻命名为准
for (let t in tableHash) {
if (jUniqueTable.indexOf(t) > -1) {
let tempOneHash = `${t} AS ${tableHash[t]}`;
let oneHash = `${tableHash[t]}`;
let reg = new RegExp(`${t} AS [a-z]{14}`, 'g');
let tempMatch = sql.match(reg) || [];
if (tempMatch.length > 1) {
for (let j = 0; j < tempMatch.length; j++) {
let thash = tempMatch[j].replace(`${t} AS `, '');
if (tempMatch[j] !== tempOneHash) {
let reg2 = new RegExp(`,?${tempMatch[j]}`, 'g');
sql = sql.replace(reg2, '');
}
let reg3 = new RegExp(`${thash}`, 'g');
sql = sql.replace(reg3, oneHash);
}
}
}
}
}
//如果 jTable 有值，则，再进行替换
for (let jt in jTable) {
let regJt = new RegExp(`${jt}`, 'g');
sql = sql.replace(regJt, `${jTable[jt]}`);
}
sql = sql.replace(/\s+/ig, ' ');
if (query === 'sentence') {
return resolve(sql);
}
(0, dbMysql_1.mysqlConnect)(sql, [], (err, results, fields) => {
if (err) {
reject(err);
}
let jsonStr = JSON.stringify(results || []);
resolve({ data: { objects: JSON.parse(jsonStr) } });
});
});
}
exports.default = fetchFind;