forked from verdnatura/hedera-web
1252 lines
27 KiB
JavaScript
1252 lines
27 KiB
JavaScript
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var Connection = require('./connection');
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/**
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* Class to handle the Database select results. Also allows
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* updates, insertions and deletions on tables where the primary key is
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* selected.
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*
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* Note that table and column names must be unique in the selection query,
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* otherwise updates are not allowed on that table/column. If two tables or
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* columns have the same name, an alias should be used to make it updatable.
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*/
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var Model = new Class();
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module.exports = Model;
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var Status = {
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CLEAN : 1
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,LOADING : 2
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,READY : 3
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,ERROR : 4
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};
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var Mode = {
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ON_CHANGE : 1
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,ON_DEMAND : 2
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};
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var Operation = {
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INSERT : 1 << 1
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,UPDATE : 1 << 2
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,DELETE : 1 << 3
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};
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var SortWay = {
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ASC : 1
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,DESC : 2
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};
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Model.extend({
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Status: Status
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,Mode: Mode
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,Operation: Operation
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,SortWay: SortWay
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});
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Model.implement({
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Extends: Vn.Object
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,Tag: 'db-model'
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,Properties: {
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/**
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* The connection used to execute the statement.
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*/
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conn: {
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type: Connection
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,set: function(x) {
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this._conn = x;
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this._autoLoad();
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}
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,get: function() {
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return this._conn;
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}
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},
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/**
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* The result index.
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*/
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resultIndex: {
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type: Number
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,set: function(x) {
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this._resultIndex = x;
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}
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,get: function() {
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return this._resultIndex;
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}
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},
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/**
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* The lot used to execute the statement.
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*/
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lot: {
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type: Vn.LotIface
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,set: function(x) {
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this.link({_lot: x}, {'change': this._onLotChange});
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this._onLotChange();
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}
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,get: function() {
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return this._lot;
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}
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},
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/**
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* The model select statement.
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*/
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stmt: {
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type: Sql.Stmt
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,set: function(x) {
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this._stmt = x;
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this._autoLoad();
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}
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,get: function() {
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return this._stmt;
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}
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},
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/**
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* The model query.
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*/
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query: {
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type: String
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,set: function(x) {
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this.stmt = new Sql.String({query: x});
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}
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,get: function() {
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if (this._stmt)
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return this._stmt.render(null);
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else
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return null;
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}
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},
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/**
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* The main table.
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*/
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mainTable: {
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type: String
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,set: function(x) {
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this._mainTable = null;
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this._requestedMainTable = x;
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this._refreshMainTable();
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}
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,get: function() {
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return this._mainTable;
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}
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},
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/**
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* Determines if the model is updatable.
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*/
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updatable: {
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type: Boolean
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,set: function(x) {
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this._updatable = false;
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this._requestedUpdatable = x;
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this._refreshUpdatable();
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}
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,get: function() {
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return this._updatable;
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}
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},
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/**
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* The number of rows in the model.
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*/
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numRows: {
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type: Number
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,get: function() {
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if (this.data)
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return this.data.length;
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return 0;
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}
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},
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/**
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* The current status of the model.
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*/
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status: {
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type: Number
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,get: function() {
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return this._status;
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}
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},
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/**
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* Checks if the model data is ready.
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*/
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ready: {
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type: Boolean
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,get: function() {
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return this._status == Status.READY;
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}
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},
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/**
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* Update mode.
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*/
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mode: {
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enumType: Mode
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,value: Mode.ON_CHANGE
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},
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/**
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* Wether to execute the model query automatically.
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*/
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autoLoad: {
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type: Boolean
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,value: true
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}
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}
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,_conn: null
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,_resultIndex: 0
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,_lot: null
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,_stmt: null
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,_status: Status.CLEAN
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,data: null
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,tables: null
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,columns: null
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,columnMap: null
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,_updatable: false
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,_paramsChanged: true
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,_requestedSortIndex: -1
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,_requestedSortName: null
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,_sortColumn: -1
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,_sortWay: null
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,_requestedIndexes: {}
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,_indexes: []
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,_requestedUpdatable: false
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,_operations: null
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,_operationsMap: null
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,_defaults: []
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,_requestedMainTable: null
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,initialize: function(props) {
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Vn.Object.prototype.initialize.call(this, props);
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this._cleanData();
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this._setStatus(Status.CLEAN);
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}
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,appendChild: function(child) {
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if (child.nodeType === Node.TEXT_NODE)
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this.query = child.textContent;
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}
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,loadXml: function(builder, node) {
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Vn.Object.prototype.loadXml.call(this, builder, node);
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var query = node.firstChild.nodeValue;
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if (query)
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this.query = query;
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}
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,_getHolders(stmt) {
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if (!stmt) return null;
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let holders = this._stmt.findHolders();
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if (!holders) return null;
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if (this._lot) {
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const params = this._lot.params;
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for (const holder of holders)
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if (params[holder] instanceof Sql.Object) {
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const paramHolders = params[holder].findHolders();
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if (paramHolders)
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holders = holders.concat(paramHolders);
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}
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}
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return holders;
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}
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,_getHolderValues: function() {
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let holders = this._getHolders(this._stmt);
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if (!holders) return null;
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const lotParams = this._lot ? this._lot.params : {};
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const params = {};
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for (const holder of holders)
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if (!(lotParams[holder] instanceof Sql.Object))
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params[holder] = lotParams[holder];
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return params;
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}
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,_getHolderParams: function() {
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let holders = this._getHolders(this._stmt);
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if (!holders) return null;
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const lotParams = this._lot ? this._lot.params : {};
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const params = {};
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for (const holder of holders)
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params[holder] = lotParams[holder];
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return params;
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}
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,_onLotChange: function() {
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const params = this._getHolderValues();
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this._paramsChanged = !Vn.Value.equals(params, this._lastParams);
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this._lastParams = params;
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if (this.autoLoad)
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this.lazyRefresh();
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}
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,_autoLoad: function() {
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if (this.autoLoad)
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this.refresh();
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else
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this.clean();
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}
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,_isReady: function(params) {
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if (!this._stmt || !this._conn)
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return false;
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for (const param in params)
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if (params[param] === undefined)
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return false;
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return true;
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}
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,lazyRefresh: function() {
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if (this._paramsChanged)
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this.refresh();
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}
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/**
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* Refresh the model data reexecuting the query on the database.
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*/
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,refresh: function() {
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const params = this._getHolderParams();
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if (this._isReady(params)) {
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this._setStatus(Status.LOADING);
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this._paramsChanged = false;
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this._conn.execStmt(this._stmt,
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this._selectDone.bind(this), params);
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} else
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this.clean();
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}
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,clean: function() {
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this._cleanData();
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this._setStatus(Status.CLEAN);
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}
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,_selectDone: function(resultSet) {
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var result;
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var dataResult;
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this._cleanData();
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try {
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for (var i = 0; result = resultSet.fetchResult(); i++)
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if (i == this._resultIndex)
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dataResult = result;
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if (!dataResult || typeof dataResult !== 'object')
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throw new Error('The provided statement doesn\'t return a result set');
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} catch (e) {
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this._setStatus(Status.ERROR);
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throw e;
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}
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this.data = dataResult.data;
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this.tables = dataResult.tables;
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this.columns = dataResult.columns;
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this.columnMap = dataResult.columnMap;
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this._repairColumns();
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this._refreshRowIndexes(0);
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this._refreshMainTable();
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for (column in this._requestedIndexes)
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this._buildIndex(column);
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var sortColumn = -1;
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if (this._requestedSortName)
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sortColumn = this.getColumnIndex(this._requestedSortName);
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else if (this._requestedSortIndex !== -1
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&& this.checkColExists(this._requestedSortIndex))
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sortColumn = this._requestedSortIndex;
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if (sortColumn !== -1)
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this._realSort(sortColumn, this._sortWay);
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this._setStatus(Status.READY);
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}
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,_refreshRowIndexes: function(start) {
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for (var i = start; i < this.data.length; i++)
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this.data[i].index = i;
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if (this._operationsMap) {
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this._operationsMap = {};
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for (var i = 0; i < this._operations.length; i++)
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this._operationsMap[i] = this._operations[i];
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}
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}
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,_cleanData: function() {
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this.data = null;
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this.tables = null;
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this.columns = null;
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this.columnMap = null;
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this._sortColumn = -1;
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this._indexes = [];
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this._resetOperations();
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}
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,_refreshUpdatable: function() {
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var oldValue = this._updatable;
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this._updatable = this._mainTable !== null && this._requestedUpdatable;
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if (oldValue != this._updatable)
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this.emit('updatable-changed');
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}
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,_refreshMainTable: function() {
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var newMainTable = null;
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var tables = this.tables;
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if (tables)
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for (var i = 0; i < tables.length; i++)
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if (tables[i].pks.length > 0)
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if (!this._requestedMainTable
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|| tables[i].name === this._requestedMainTable) {
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newMainTable = i;
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break;
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}
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this._mainTable = newMainTable;
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this._refreshUpdatable();
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}
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/**
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* Sets the default value for inserted fields.
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*
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* @param {String} field The destination field name
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* @param {String} table The destination table name
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* @param {Sql.Expr} srcColumn The default value expression
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*/
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,setDefault: function(field, table, expr) {
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this._defaults.push({field, table, expr});
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}
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/**
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* Sets the default value for inserted fields.
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*
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* @param {String} field The destination field name
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* @param {String} table The destination table name
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* @param {Object} value The default value
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*/
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,setDefaultFromValue: function(field, table, value) {
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this._defaults.push({field, table, value});
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}
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/**
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* Sets the default value for inserted fields from another column in the
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* model.
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*
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* @param {String} field The destination field name
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* @param {String} table The destination table name
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* @param {String} srcColumn The source column
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*/
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,setDefaultFromColumn: function(field, table, srcColumn) {
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this._defaults.push({field, table, srcColumn});
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}
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/**
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* Checks if column index exists.
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*
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* @param {integer} column The column index
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* @return {Boolean} %true if column exists, %false otherwise
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*/
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,checkColExists: function(column) {
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return this.columns
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&& column >= 0
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&& column < this.columns.length;
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}
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/**
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* Checks if column name exists.
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*
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* @param {string} columnName The column name
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* @return {Boolean} %true if column exists, %false otherwise
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*/
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,checkColName: function(columnName) {
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return this.columnMap
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&& this.columnMap[columnName] != null;
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}
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/**
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* Checks if the row exists.
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*
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* @param {integer} rowIndex The row index
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* @return {Boolean} %true if row exists, %false otherwise
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*/
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,checkRowExists: function(rowIndex) {
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return this.data
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&& rowIndex >= 0
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&& rowIndex < this.data.length;
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}
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,_checkTableUpdatable: function(tableIndex) {
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var tableUpdatable = tableIndex !== null
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&& this.tables[tableIndex].pks.length > 0;
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if (!tableUpdatable)
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console.warn("Db.Model: Table %s is not updatable",
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this.tables[tableIndex].name);
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return tableUpdatable;
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}
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/**
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* Get the index of the column from its name.
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*
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* @param {string} columnName The column name
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* @return {number} The column index or -1 if column not exists
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*/
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,getColumnIndex: function(columnName) {
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if (this.checkColName(columnName))
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return this.columnMap[columnName].index;
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return -1;
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}
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/**
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* Get the index of the column from its name.
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*
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* @param {number} columnIndex The column name
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* @return {string} The column index or -1 if column not exists
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*/
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,getColumnName: function(columnIndex) {
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if (this.checkColExists(columnIndex))
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return this.columns[columnIndex].name;
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return null;
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}
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/**
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* Gets the row as object.
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*
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* @param {number} rowIndex The row index
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* @return {Object} The row
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*/
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,getObject: function(rowIndex) {
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if (!this.checkRowExists(rowIndex))
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return undefined;
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return this.data[rowIndex];
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}
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/**
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* Gets a value from the model.
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*
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* @param {number} rowIndex The row index
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* @param {string} columnName The column name
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* @return {mixed} The value
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*/
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,get: function(rowIndex, columnName) {
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if (this.checkRowExists(rowIndex))
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return this.data[rowIndex][columnName];
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}
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/**
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* Updates a value on the model.
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*
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* @param {number} rowIndex The row index
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* @param {string} columnName The column name
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* @param {mixed} value The new value
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*/
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,set: function(rowIndex, columnName, value) {
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if (!this.checkRowExists(rowIndex)
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&& !this.checkColName(columnName))
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return;
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var tableIndex = this.columnMap[columnName].table;
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if (!this._checkTableUpdatable(tableIndex))
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return;
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var row = this.data[rowIndex];
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var op = this._createOperation(rowIndex);
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op.type |= Operation.UPDATE;
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if (!op.oldValues)
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op.oldValues = [];
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if (!op.tables)
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op.tables = {};
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var tableOp = op.tables[tableIndex];
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if (!tableOp) {
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tableOp = Operation.UPDATE;
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var pks = this.tables[tableIndex].pks;
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for (const pk of pks)
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if (!row[pk] && !op.oldValues[pk]) {
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tableOp = Operation.INSERT;
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break;
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}
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op.tables[tableIndex] = tableOp;
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}
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if (tableOp & Operation.UPDATE
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&& op.oldValues[columnName] === undefined)
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op.oldValues[columnName] = row[columnName];
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this.emit('row-updated-before', rowIndex);
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row[columnName] = value;
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this.emit('row-updated', rowIndex, [columnName]);
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if (this.mode == Mode.ON_CHANGE
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&& !(op.type & Operation.INSERT))
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this.performOperations();
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}
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/**
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* Gets a value from the model using the column index.
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*
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* @param {number} rowIndex The row index
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* @param {number} columnIndex The column index
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* @return {mixed} The value
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*/
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,getByIndex: function(rowIndex, columnIndex) {
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var columnName = this.getColumnName(columnIndex);
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if (columnName)
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return this.get(rowIndex, columnName);
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return undefined;
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}
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|
|
/**
|
|
* Updates a value on the model using the column index.
|
|
*
|
|
* @param {number} rowIndex The row index
|
|
* @param {number} columnIndex The column index
|
|
* @param {mixed} value The new value
|
|
*/
|
|
,setByIndex: function(rowIndex, columnIndex, value) {
|
|
var columnName = this.getColumnName(columnIndex);
|
|
|
|
if (columnName)
|
|
this.set(rowIndex, columnName, value);
|
|
else
|
|
console.warn('Db.Model: Column %d doesn\'t exist', columnIndex);
|
|
}
|
|
|
|
/**
|
|
* Deletes a row from the model.
|
|
*
|
|
* @param {number} rowIndex The row index
|
|
*/
|
|
,deleteRow: function(rowIndex) {
|
|
if (!this.checkRowExists(rowIndex)
|
|
|| !this._checkTableUpdatable(this._mainTable))
|
|
return;
|
|
|
|
var op = this._createOperation(rowIndex);
|
|
op.type |= Operation.DELETE;
|
|
|
|
if (!this._requestedMainTable) {
|
|
this.emit('row-deleted-before', rowIndex);
|
|
this.data.splice(rowIndex, 1);
|
|
this.emit('row-deleted', rowIndex);
|
|
this._refreshRowIndexes(rowIndex);
|
|
} else {
|
|
this.emit('row-updated-before', rowIndex);
|
|
|
|
if (!op.oldValues)
|
|
op.oldValues = [];
|
|
|
|
var updatedCols = [];
|
|
|
|
for (var i = 0; i < this.columns.length; i++)
|
|
if (this.columns[i].table == this._mainTable) {
|
|
const colName = this.columns[i].name;
|
|
|
|
if (op.oldValues[colName] === undefined)
|
|
op.oldValues[colName] = op.row[colName];
|
|
|
|
op.row[colName] = null;
|
|
updatedCols.push(i);
|
|
}
|
|
|
|
this.emit('row-updated', rowIndex, updatedCols);
|
|
}
|
|
|
|
if (this.mode === Mode.ON_CHANGE)
|
|
this.performOperations();
|
|
}
|
|
|
|
/**
|
|
* Inserts a new row on the model.
|
|
*
|
|
* @return The index of the inserted row
|
|
*/
|
|
,insertRow: function() {
|
|
if (!this._checkTableUpdatable(this._mainTable))
|
|
return -1;
|
|
|
|
var cols = this.columns;
|
|
var newRow = {};
|
|
|
|
for (var i = 0; i < cols.length; i++)
|
|
if (cols[i].table === this._mainTable)
|
|
newRow[cols[i].name] = cols[i].def;
|
|
else
|
|
newRow[cols[i].name] = null;
|
|
|
|
var rowIndex = this.data.push(newRow) - 1;
|
|
newRow.index = rowIndex;
|
|
|
|
var op = this._createOperation(rowIndex);
|
|
op.type |= Operation.INSERT;
|
|
|
|
this.emit('row-inserted', rowIndex);
|
|
|
|
return rowIndex;
|
|
}
|
|
|
|
/**
|
|
* Performs all model changes on the database.
|
|
*/
|
|
,performOperations: function() {
|
|
var ops = this._operations;
|
|
|
|
if (ops.length === 0) {
|
|
this.emit('operations-done');
|
|
return;
|
|
}
|
|
|
|
var stmts = new Sql.MultiStmt();
|
|
|
|
var query = new Sql.String({query: 'START TRANSACTION'});
|
|
stmts.push(query);
|
|
|
|
for (var i = 0; i < ops.length; i++) {
|
|
query = null;
|
|
var op = ops[i];
|
|
|
|
if (op.type & Operation.DELETE) {
|
|
if (op.type & Operation.INSERT)
|
|
continue;
|
|
|
|
var where = this._createWhere(this._mainTable, op, true);
|
|
|
|
if (where) {
|
|
query = new Sql.Delete({where});
|
|
query.addTarget(this._createTarget(this._mainTable));
|
|
}
|
|
} else if (op.type & (Operation.INSERT | Operation.UPDATE)) {
|
|
query = new Sql.MultiStmt();
|
|
|
|
for (var tableIndex in op.tables) {
|
|
var stmt = this._createDmlQuery(op, parseInt(tableIndex));
|
|
query.push(stmt);
|
|
}
|
|
}
|
|
|
|
if (query) {
|
|
stmts.push(query);
|
|
} else {
|
|
console.warn('Db.Model: %s', _('ErrorSavingChanges'));
|
|
return;
|
|
}
|
|
}
|
|
|
|
var query = new Sql.String({query: 'COMMIT'});
|
|
stmts.push(query);
|
|
|
|
this._conn.execStmt(stmts,
|
|
this._onOperationsDone.bind(this, ops));
|
|
|
|
this._resetOperations();
|
|
}
|
|
|
|
,_createDmlQuery: function(op, tableIndex) {
|
|
var where = this._createWhere(tableIndex, op, false);
|
|
|
|
if (!where)
|
|
return null;
|
|
|
|
var multiStmt = new Sql.MultiStmt();
|
|
var target = this._createTarget(tableIndex);
|
|
|
|
var select = new Sql.Select({where});
|
|
select.addTarget(target);
|
|
|
|
var row = op.row;
|
|
var cols = this.columns;
|
|
|
|
if (op.tables[tableIndex] & Operation.INSERT) {
|
|
var dmlQuery = new Sql.Insert();
|
|
var table = this.tables[tableIndex];
|
|
|
|
for (const def of defaults)
|
|
if (def.table === table.name) {
|
|
if (def.value)
|
|
dmlQuery.addSet(def.field, def.value);
|
|
else if (def.expr)
|
|
dmlQuery.addExpr(def.field, def.expr);
|
|
else if (def.srcColumn)
|
|
dmlQuery.addSet(def.field, row[def.srcColumn]);
|
|
}
|
|
|
|
for (const col of cols)
|
|
if (col.table === tableIndex) {
|
|
if (row[col.name] !== null)
|
|
dmlQuery.addSet(col.orgname, row[col.name]);
|
|
select.addField(col.orgname);
|
|
}
|
|
} else {
|
|
var updateWhere = this._createWhere(tableIndex, op, true);
|
|
|
|
if (!updateWhere)
|
|
return null;
|
|
|
|
var dmlQuery = new Sql.Update({where: updateWhere});
|
|
|
|
for (const col of cols)
|
|
if (col.table === tableIndex && op.oldValues[col.name] !== undefined) {
|
|
var fieldName = col.orgname;
|
|
dmlQuery.addSet(fieldName, row[col.name]);
|
|
select.addField(fieldName);
|
|
}
|
|
}
|
|
|
|
dmlQuery.addTarget(target);
|
|
|
|
multiStmt.push(dmlQuery);
|
|
multiStmt.push(select);
|
|
return multiStmt;
|
|
}
|
|
|
|
,_onOperationsDone: function(ops, resultSet) {
|
|
var error = resultSet.getError();
|
|
|
|
if (error) {
|
|
this._operations = this._operations.concat(ops);
|
|
|
|
for (var i = 0; i < ops.length; i++)
|
|
this._operationsMap[ops[i].row.index] = ops[i];
|
|
|
|
throw error;
|
|
}
|
|
|
|
resultSet.fetchResult();
|
|
var isOperation = false;
|
|
|
|
for (var i = 0; i < ops.length; i++) {
|
|
var op = ops[i];
|
|
var row = op.row;
|
|
|
|
if (!(op.type & Operation.DELETE
|
|
&& op.type & Operation.INSERT))
|
|
isOperation = true;
|
|
|
|
if (op.type & Operation.DELETE) {
|
|
resultSet.fetchResult();
|
|
} else if (op.type & (Operation.INSERT | Operation.UPDATE)) {
|
|
this.emit('row-updated-before', row.index);
|
|
|
|
var updatedCols = [];
|
|
var cols = this.columns;
|
|
|
|
for (var tableIndex in op.tables) {
|
|
var j = 0;
|
|
tableIndex = parseInt(tableIndex);
|
|
|
|
resultSet.fetchResult();
|
|
var newValues = resultSet.fetchRow();
|
|
|
|
if (op.tables[tableIndex] & Operation.INSERT) {
|
|
for (var i = 0; i < cols.length; i++)
|
|
if (cols[i].table === tableIndex) {
|
|
row[cols[i].name] = newValues[j++];
|
|
updatedCols.push(i);
|
|
}
|
|
} else {
|
|
for (var i = 0; i < cols.length; i++)
|
|
if (cols[i].table === tableIndex
|
|
&& op.oldValues[i] !== undefined) {
|
|
row[cols[i].name] = newValues[j++];
|
|
updatedCols.push(i);
|
|
}
|
|
}
|
|
}
|
|
|
|
this.emit('row-updated', row.index, updatedCols);
|
|
}
|
|
}
|
|
|
|
resultSet.fetchResult();
|
|
|
|
// if (isOperation)
|
|
this.emit('operations-done');
|
|
}
|
|
|
|
/**
|
|
* Undoes all unsaved changes made to the model.
|
|
*/
|
|
,reverseOperations: function() {
|
|
for (var i = 0; i < this._operations.length; i++) {
|
|
var op = this._operations[i];
|
|
var row = op.row;
|
|
|
|
if (op.type & Operation.DELETE
|
|
&& !(op.type & Operation.INSERT)) {
|
|
this.data.splice(row.index, 0, row);
|
|
this.emit('row-inserted', row.index);
|
|
} else if (op.type & Operation.UPDATE) {
|
|
this.emit('row-updated-before', row.index);
|
|
|
|
var updatedCols = [];
|
|
var cols = this.columns;
|
|
|
|
for (var i = 0; i < cols.length; i++)
|
|
if (op.oldValues[i] !== undefined) {
|
|
const colName = cols[i].name;
|
|
row[colName] = op.oldValues[colName];
|
|
updatedCols.push(i);
|
|
}
|
|
|
|
this.emit('row-updated', row.index, updatedCols);
|
|
}
|
|
}
|
|
|
|
this._resetOperations();
|
|
this._refreshRowIndexes(0);
|
|
}
|
|
|
|
,_resetOperations: function() {
|
|
this._operations = [];
|
|
this._operationsMap = {};
|
|
}
|
|
|
|
/*
|
|
* Function used to sort the model ascending.
|
|
*/
|
|
,sortFunctionAsc: function(column, a, b) {
|
|
if (a[column] < b[column])
|
|
return -1;
|
|
else if (a[column] > b[column])
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Function used to sort the model descending.
|
|
*/
|
|
,sortFunctionDesc: function(column, a, b) {
|
|
if (a[column] > b[column])
|
|
return -1;
|
|
else if (a[column] < b[column])
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Orders the model by the specified column name.
|
|
*
|
|
* @param {integer} columnName The column name
|
|
* @param {SortWay} way The sort way
|
|
*/
|
|
,sortByName: function(columnName, way) {
|
|
this._requestedSortIndex = -1;
|
|
this._requestedSortName = columnName;
|
|
|
|
if (this.checkColName(columnName))
|
|
this._sort(columnName, way);
|
|
}
|
|
|
|
/**
|
|
* Orders the model by the specified column.
|
|
*
|
|
* @param {integer} column The column index
|
|
* @param {SortWay} way The sort way
|
|
*/
|
|
,sort: function(column, way) {
|
|
this._requestedSortIndex = column;
|
|
this._requestedSortName = null;
|
|
|
|
const columnName = this.getColumnName(column);
|
|
if (columnName) return;
|
|
|
|
this._sort(columnName, way);
|
|
}
|
|
|
|
,_sort: function(column, way) {
|
|
this._setStatus(Status.LOADING);
|
|
this._realSort(column, way);
|
|
this._setStatus(Status.READY);
|
|
}
|
|
|
|
,_realSort: function(column, way) {
|
|
if (column !== this._sortColumn) {
|
|
if (way === SortWay.DESC)
|
|
var sortFunction = this.sortFunctionDesc;
|
|
else
|
|
var sortFunction = this.sortFunctionAsc;
|
|
|
|
this.data.sort(sortFunction.bind(this, column));
|
|
} else if (way !== this._sortWay)
|
|
this.data.reverse();
|
|
|
|
this._sortColumn = column;
|
|
this._sortWay = way;
|
|
|
|
this._refreshRowIndexes(0);
|
|
}
|
|
|
|
/**
|
|
* Builds an internal hash index for the specified column, this speeds
|
|
* significantly searches on that column, specially when model has a lot of
|
|
* rows.
|
|
*
|
|
* FIXME: Not fully implemented.
|
|
*
|
|
* @param {String} column The column name
|
|
*/
|
|
,indexColumn: function(column) {
|
|
this._requestedIndexes[column] = true;
|
|
|
|
if (this._status === Status.READY)
|
|
this._buildIndex(column);
|
|
}
|
|
|
|
,_buildIndex: function(columnName) {
|
|
if (this.checkColName(columnName)) {
|
|
var index = {};
|
|
var data = this.data;
|
|
|
|
switch (this.columns[columnName].type) {
|
|
case Connection.Type.TIMESTAMP:
|
|
case Connection.Type.DATE_TIME:
|
|
case Connection.Type.DATE:
|
|
for (var i = 0; i < data.length; i++)
|
|
index[data[i][columnName].toString()] = i;
|
|
break;
|
|
default:
|
|
for (var i = 0; i < data.length; i++)
|
|
index[data[i][columnName]] = i;
|
|
}
|
|
|
|
this._indexes[columnName] = index;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Searchs a value on the model and returns the row index of the first
|
|
* ocurrence.
|
|
* If an index have been built on that column, it will be used, for more
|
|
* information see the indexColumn() method.
|
|
*
|
|
* @param {String} columnName The column name
|
|
* @param {Object} value The value to search
|
|
* @return {integer} The column index
|
|
*/
|
|
,search: function(columnName, value) {
|
|
if (!this.checkColName(columnName))
|
|
return -1;
|
|
|
|
if (value)
|
|
switch (this.columnMap[columnName].type) {
|
|
case Connection.Type.BOOLEAN:
|
|
value = !!value;
|
|
break;
|
|
case Connection.Type.INTEGER:
|
|
value = parseInt(value);
|
|
break;
|
|
case Connection.Type.DOUBLE:
|
|
value = parseFloat(value);
|
|
break;
|
|
default:
|
|
value = value.toString();
|
|
}
|
|
|
|
let rowIndex = -1;
|
|
const index = this._indexes[columnName];
|
|
|
|
if (index) {
|
|
// Searchs the value using an internal index
|
|
|
|
if (index[value] !== undefined)
|
|
rowIndex = index[value];
|
|
} else {
|
|
// Searchs the value using a loop
|
|
|
|
var data = this.data;
|
|
|
|
switch (this.columnMap[columnName].type) {
|
|
case Connection.Type.TIMESTAMP:
|
|
case Connection.Type.DATE_TIME:
|
|
case Connection.Type.DATE:
|
|
for (var i = 0; i < data.length; i++)
|
|
if (value === data[i][columnName].toString()) {
|
|
rowIndex = i;
|
|
break;
|
|
}
|
|
break;
|
|
default:
|
|
for (var i = 0; i < data.length; i++)
|
|
if (value === data[i][columnName]) {
|
|
rowIndex = i;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
return rowIndex;
|
|
}
|
|
|
|
/**
|
|
* Searchs a value on the model and returns the row index of the first
|
|
* ocurrence.
|
|
*
|
|
* @param {integer} columnIndex The column index
|
|
* @param {Object} value The value to search
|
|
* @return {integer} The column index
|
|
*/
|
|
,searchByIndex: function(columnIndex, value) {
|
|
var columnName = this.getColumnName(columnIndex);
|
|
return this.search(columnName, value);
|
|
}
|
|
|
|
,_setStatus: function(status) {
|
|
this._status = status;
|
|
this.emit('status-changed', status);
|
|
this.emit('status-changed-after', status);
|
|
}
|
|
|
|
,_createTarget: function(tableIndex) {
|
|
var table = this.tables[tableIndex];
|
|
|
|
return new Sql.Table({
|
|
name: table.orgname
|
|
,schema: table.schema
|
|
});
|
|
}
|
|
|
|
,_createWhere: function(tableIndex, op, useOldValues) {
|
|
const where = new Sql.Operation({type: Sql.Operation.Type.AND});
|
|
const pks = this.tables[tableIndex].pks;
|
|
|
|
if (pks.length === 0)
|
|
return null;
|
|
|
|
for (const pk of pks) {
|
|
const column = this.columnMap[pk];
|
|
|
|
const equalOp = new Sql.Operation({type: Sql.Operation.Type.EQUAL});
|
|
equalOp.push(new Sql.Field({name: column.orgname}));
|
|
where.push(equalOp);
|
|
|
|
let pkValue = null;
|
|
|
|
if (useOldValues && op.oldValues
|
|
&& op.oldValues[pk] !== undefined)
|
|
pkValue = op.oldValues[pk];
|
|
else
|
|
pkValue = op.row[pk];
|
|
|
|
if (pkValue)
|
|
equalOp.push(new Sql.Value({value: pkValue}));
|
|
else if (column.flags & Connection.Flag.AI && !useOldValues)
|
|
equalOp.push(new Sql.Function({name: 'LAST_INSERT_ID'}));
|
|
else
|
|
return null;
|
|
}
|
|
|
|
return where;
|
|
}
|
|
|
|
,_createOperation: function(rowIndex) {
|
|
var op = this._operationsMap[rowIndex];
|
|
|
|
if (!op) {
|
|
op = {
|
|
type: 0,
|
|
row: this.data[rowIndex]
|
|
};
|
|
this._operations.push(op);
|
|
this._operationsMap[rowIndex] = op;
|
|
}
|
|
|
|
return op;
|
|
}
|
|
|
|
/**
|
|
* Overrides information about a table and its columns. If a parameter is
|
|
* not provided, the original will be preserved. This method should be used
|
|
* primarily to avoid the mysql bug that causes this information will not
|
|
* be set correctly.
|
|
* For more information see the following links:
|
|
* - https://bugs.mysql.com/bug.php?id=44660
|
|
* - https://bugs.mysql.com/bug.php?id=26894
|
|
*
|
|
* @param {String} table The table alias
|
|
* @param {String} orgtable The original table name
|
|
* @param {String} schema The original table schema
|
|
* @param {Array} pks Array with the names of primary keys
|
|
* @param {String} ai The autoincrement column name
|
|
*/
|
|
,setInfo: function(table, orgname, schema, pks, ai) {
|
|
if (!this.tableInfo)
|
|
this.tableInfo = {};
|
|
|
|
this.tableInfo[table] = {
|
|
orgname,
|
|
schema,
|
|
pks,
|
|
ai
|
|
};
|
|
|
|
this._repairColumns();
|
|
}
|
|
|
|
,_repairColumns: function() {
|
|
// Repairs wrong table info
|
|
|
|
if (this.tableInfo && this.tables)
|
|
for (var i = 0; i < this.tables.length; i++) {
|
|
var table = this.tables[i];
|
|
var tableInfo = this.tableInfo[table.name];
|
|
|
|
if (!tableInfo)
|
|
continue;
|
|
|
|
table.orgname = tableInfo.orgname;
|
|
table.schema = tableInfo.schema;
|
|
|
|
if (tableInfo.pks) {
|
|
table.pks = [];
|
|
|
|
for (const pk of tableInfo.pks) {
|
|
if (this.checkColName(pk))
|
|
table.pks.push(pk);
|
|
else
|
|
console.warn('Db.Model: Can\'t repair primary key: `%s`.`%s`'
|
|
,tableInfo.orgname
|
|
,pk
|
|
);
|
|
}
|
|
}
|
|
|
|
if (tableInfo.ai) {
|
|
if (this.checkColName(tableInfo.ai))
|
|
this.columnMap[tableInfo.ai].flags |= Connection.Flag.AI;
|
|
else
|
|
console.warn('Db.Model: Can\'t repair autoincrement column: `%s`.`%s`'
|
|
,tableInfo.orgname
|
|
,tableInfo.ai
|
|
);
|
|
}
|
|
}
|
|
}
|
|
});
|
|
|