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import * as Operators from './Collection/Where/Operators'; |
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/** |
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* |
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*/ |
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export default class Collection extends Array { |
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constructor(...items) { |
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super(...items); |
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} |
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get operators() { |
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return { |
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'==': Operators.equal, |
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'!=': Operators.notEqual, |
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'>=': Operators.gtAndEqual, |
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'<=': Operators.ltAndEqual, |
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'>': Operators.gt, |
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'<': Operators.lt, |
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} |
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} |
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first() { |
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return this[0] ?? null; |
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} |
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last() { |
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return this.slice(-1)[0] ?? null; |
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} |
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merge(array): Collection { |
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this.push(...array); |
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return this; |
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} |
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pluck(field: string, keyField = '') { |
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const lookUpFields = field.split('.'); |
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if (keyField) { |
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const lookUpKeyField = keyField.split('.'); |
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const result = {}; |
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for (const i in this) { |
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result[this._getRowFieldResult(this[i], lookUpKeyField)] = this._getRowFieldResult(this[i], lookUpFields); |
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} |
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return result; |
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} |
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const result = []; |
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for (const i in this) { |
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result.push(this._getRowFieldResult(this[i], lookUpFields)); |
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} |
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return result; |
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} |
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random() { |
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return this[Math.round(((this.length - 1) * Math.random()))]; |
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} |
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unique(field: string): Collection { |
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const unique = {}; |
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for (const i in this) { |
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unique[this[i][field]] = this[i]; |
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} |
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return new Collection(...Object.values(unique)); |
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} |
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where(field: string, operator: string, value = null): Collection { |
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value = value ?? operator; |
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operator = (operator === value) ? '==' : operator; |
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if (!Object.prototype.hasOwnProperty.call(this.operators, operator)) { |
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throw new Error("Invalid comparison operator used"); |
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} |
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return this.whereIfFunction(field, (field, object) => { |
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return this.operators[operator](object[field], value); |
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}) |
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} |
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whereBetween(field: string, values): Collection { |
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return this.whereIfFunction(field, (field, object) => { |
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const fieldValue = object[field]; |
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return fieldValue >= values[0] && fieldValue <= values[1] |
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}); |
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} |
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whereIfFunction(field: string, whereIfFunction: CallableFunction): Collection { |
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const register = new Collection(); |
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for (const i in this) { |
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if (whereIfFunction(field, this[i])) { |
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register.push(this[i]); |
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} |
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} |
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return register; |
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} |
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whereIn(field: string, values): Collection { |
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return this.whereIfFunction(field, (field, object) => { |
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return values.includes(object[field]); |
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}); |
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} |
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whereInstanceOf(classInstance): Collection { |
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return this.whereIfFunction(null, (field, object) => { |
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return object instanceof classInstance; |
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}); |
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} |
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whereNotBetween(field: string, values): Collection { |
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return this.whereIfFunction(field, (field, object) => { |
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const fieldValue = object[field]; |
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return !(fieldValue >= values[0] && fieldValue <= values[1]) |
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}); |
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} |
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whereNotIn(field: string, values): Collection { |
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return this.whereIfFunction(field, (field, object) => { |
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return !values.includes(object[field]); |
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}); |
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} |
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whereNotInstanceOf(classInstance): Collection { |
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return this.whereIfFunction(null, (field, object) => { |
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return !(object instanceof classInstance); |
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}); |
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} |
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whereNotNull(field: string): Collection { |
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return this.whereIfFunction(field, (field, object) => { |
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return object[field] !== null; |
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}); |
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} |
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whereNull(field: string): Collection { |
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return this.whereIfFunction(field, (field, object) => { |
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return object[field] === null; |
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}); |
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} |
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toJSON() { |
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return this.toObject(); |
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} |
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toObject() { |
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return this.map((item) => { |
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return (item.toObject?.() ?? item); |
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}); |
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} |
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private _getRowFieldResult(row, lookUpFields) { |
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let resultField = row[lookUpFields[0]] ?? null; |
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for (let i = 1; i < lookUpFields.length; i++) { |
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const currentField = lookUpFields[i]; |
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if (resultField === null) { |
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break; |
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} |
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if (resultField instanceof Collection) { |
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return resultField.pluck(lookUpFields[i]); |
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} |
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resultField = resultField[currentField] ?? null; |
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} |
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return resultField; |
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} |
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} |
mbroersen /
jeloquent
