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267 lines
6.0 KiB
TypeScript
267 lines
6.0 KiB
TypeScript
// Loaded from https://raw.githubusercontent.com/denjucks/dex/master/lib/query/joinclause.js
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import assert from '../deps/@jspm/core@1.1.0/nodelibs/assert.js';
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// JoinClause
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// -------
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// The "JoinClause" is an object holding any necessary info about a join,
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// including the type, and any associated tables & columns being joined.
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function JoinClause(table, type, schema) {
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this.schema = schema;
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this.table = table;
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this.joinType = type;
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this.and = this;
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this.clauses = [];
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}
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function getClauseFromArguments(compilerType, bool, first, operator, second) {
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let data = null;
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if (typeof first === 'function') {
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data = {
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type: 'onWrapped',
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value: first,
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bool: bool,
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};
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} else {
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switch (arguments.length) {
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case 3: {
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data = { type: 'onRaw', value: first, bool };
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break;
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}
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case 4:
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data = {
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type: compilerType,
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column: first,
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operator: '=',
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value: operator,
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bool,
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};
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break;
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default:
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data = {
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type: compilerType,
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column: first,
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operator,
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value: second,
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bool,
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};
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}
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}
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return data;
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}
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Object.assign(JoinClause.prototype, {
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grouping: 'join',
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// Adds an "on" clause to the current join object.
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on(first) {
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if (typeof first === 'object' && typeof first.toSQL !== 'function') {
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const keys = Object.keys(first);
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let i = -1;
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const method = this._bool() === 'or' ? 'orOn' : 'on';
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while (++i < keys.length) {
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this[method](keys[i], first[keys[i]]);
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}
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return this;
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}
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const data = getClauseFromArguments('onBasic', this._bool(), ...arguments);
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if (data) {
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this.clauses.push(data);
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}
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return this;
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},
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// Adds a "using" clause to the current join.
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using(column) {
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return this.clauses.push({ type: 'onUsing', column, bool: this._bool() });
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},
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/*// Adds an "and on" clause to the current join object.
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andOn() {
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return this.on.apply(this, arguments);
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},*/
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// Adds an "or on" clause to the current join object.
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orOn(first, operator, second) {
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return this._bool('or').on.apply(this, arguments);
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},
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onVal(first) {
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if (typeof first === 'object' && typeof first.toSQL !== 'function') {
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const keys = Object.keys(first);
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let i = -1;
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const method = this._bool() === 'or' ? 'orOnVal' : 'onVal';
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while (++i < keys.length) {
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this[method](keys[i], first[keys[i]]);
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}
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return this;
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}
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const data = getClauseFromArguments('onVal', this._bool(), ...arguments);
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if (data) {
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this.clauses.push(data);
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}
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return this;
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},
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andOnVal() {
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return this.onVal(...arguments);
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},
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orOnVal() {
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return this._bool('or').onVal(...arguments);
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},
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onBetween(column, values) {
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assert(
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Array.isArray(values),
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'The second argument to onBetween must be an array.'
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);
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assert(
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values.length === 2,
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'You must specify 2 values for the onBetween clause'
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);
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this.clauses.push({
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type: 'onBetween',
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column,
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value: values,
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bool: this._bool(),
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not: this._not(),
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});
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return this;
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},
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onNotBetween(column, values) {
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return this._not(true).onBetween(column, values);
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},
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orOnBetween(column, values) {
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return this._bool('or').onBetween(column, values);
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},
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orOnNotBetween(column, values) {
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return this._bool('or')._not(true).onBetween(column, values);
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},
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onIn(column, values) {
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if (Array.isArray(values) && values.length === 0) return this.on(1, '=', 0);
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this.clauses.push({
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type: 'onIn',
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column,
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value: values,
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not: this._not(),
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bool: this._bool(),
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});
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return this;
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},
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onNotIn(column, values) {
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return this._not(true).onIn(column, values);
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},
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orOnIn(column, values) {
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return this._bool('or').onIn(column, values);
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},
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orOnNotIn(column, values) {
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return this._bool('or')._not(true).onIn(column, values);
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},
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onNull(column) {
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this.clauses.push({
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type: 'onNull',
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column,
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not: this._not(),
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bool: this._bool(),
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});
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return this;
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},
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orOnNull(callback) {
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return this._bool('or').onNull(callback);
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},
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onNotNull(callback) {
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return this._not(true).onNull(callback);
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},
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orOnNotNull(callback) {
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return this._not(true)._bool('or').onNull(callback);
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},
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onExists(callback) {
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this.clauses.push({
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type: 'onExists',
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value: callback,
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not: this._not(),
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bool: this._bool(),
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});
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return this;
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},
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orOnExists(callback) {
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return this._bool('or').onExists(callback);
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},
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onNotExists(callback) {
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return this._not(true).onExists(callback);
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},
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orOnNotExists(callback) {
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return this._not(true)._bool('or').onExists(callback);
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},
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// Explicitly set the type of join, useful within a function when creating a grouped join.
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type(type) {
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this.joinType = type;
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return this;
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},
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_bool(bool) {
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if (arguments.length === 1) {
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this._boolFlag = bool;
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return this;
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}
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const ret = this._boolFlag || 'and';
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this._boolFlag = 'and';
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return ret;
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},
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_not(val) {
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if (arguments.length === 1) {
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this._notFlag = val;
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return this;
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}
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const ret = this._notFlag;
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this._notFlag = false;
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return ret;
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},
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});
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Object.defineProperty(JoinClause.prototype, 'or', {
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get() {
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return this._bool('or');
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},
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});
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JoinClause.prototype.andOn = JoinClause.prototype.on;
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JoinClause.prototype.andOnIn = JoinClause.prototype.onIn;
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JoinClause.prototype.andOnNotIn = JoinClause.prototype.onNotIn;
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JoinClause.prototype.andOnNull = JoinClause.prototype.onNull;
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JoinClause.prototype.andOnNotNull = JoinClause.prototype.onNotNull;
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JoinClause.prototype.andOnExists = JoinClause.prototype.onExists;
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JoinClause.prototype.andOnNotExists = JoinClause.prototype.onNotExists;
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JoinClause.prototype.andOnBetween = JoinClause.prototype.onBetween;
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JoinClause.prototype.andOnNotBetween = JoinClause.prototype.onNotBetween;
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export default JoinClause;
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