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import { dayjs } from '../dayjs';
import { I18n } from '../i18n/i18n';
import { IDictionary, Utils } from '../utils';
import { Datasource } from './datasource';
import { IMemoryDatasource } from './interfaces';
/**
* Base class to perform CRUD methods using data stored in memory.
*/
export class MemoryDatasource extends Datasource implements IMemoryDatasource {
public getLoadedData(): IDictionary[] {
return this.allData;
}
/**
* All memory data
*/
public allData: IDictionary<any>[] = [];
/**
* Translate columns
*/
public translate: boolean | string[] = false;
/**
* Function to overwrite the sort function
*/
public sortFunction?: (value1: any, value2: any, columnName: string) => boolean;
/**
* Params to control sorting
*/
public sortParams: IDictionary<any> = {};
/**
* Filtered data
*/
protected filteredData: IDictionary<any>[] = [];
/**
* Order types
*/
protected orderTypes: IDictionary<number> = {
asc: 1,
desc: -1,
same: 0,
};
protected originalValues: IDictionary<any>[] = [];
/**
* Creates a new Memory Datasource
* @param datasource Datasource structure
*/
constructor(datasource: IMemoryDatasource) {
super(datasource);
this.translate = this.getInitValue('translate', datasource.translate, this.translate);
this.sortFunction = this.getInitValue('sortFunction', datasource.sortFunction, this.sortFunction);
this.sortParams = this.getInitValue('sortParams', datasource.sortParams, this.sortParams);
this.originalValues = [];
}
public initialize(): void {
super.initialize();
this.allData = this.data;
this.translateData();
this.get();
if (this.translate) I18n.registerChangeListener(this.translateData.bind(this));
}
/**
* Retrieves a promise with data value ordered by order value
* and filtered by search, filter, limit and page
* @returns Promise with data value
*/
public async get(): Promise<any> {
this.updateInternalProperties();
this.updateFilteredData();
this.sortFilteredData();
const end = this.loadAll ? this.allData.length : this.limit * this.page;
const start = this.loadAll ? 0 : end - this.limit;
this.data = this.filteredData.slice(start, end);
this.total = this.filteredData.length;
this.currentRow = {};
const data = await this.updateSelectedPage();
await this.runGetCallbacks();
return data;
}
/**
* Update datasource data
*/
public async updateData(data: IDictionary<any>[]): Promise<any> {
this.allData = data;
this.originalValues = [];
this.translateData();
return this.get();
}
/**
* Updates filtered data
*/
protected updateFilteredData() {
this.filteredData = Object.keys(this.filter).length
? this.allData.filter((row) => this.getRowByFilter(row))
: Array.from(this.allData);
this.filteredData = this.search ? this.filteredData.filter((row) => this.getRowBySearch(row)) : this.filteredData;
}
/**
* Checks if row passed on current filter
* @param row Each datasource row
* @returns Row passed
*/
protected getRowByFilter(row: IDictionary<any>) {
let filtered = false;
Object.keys(this.filter).every((key) => {
const hasValue = row[key] && row[key].toString().indexOf(this.filter[key]) !== -1;
const isNull = !row[key] && this.filter[key] === 'NULL';
filtered = hasValue || isNull;
return filtered;
});
return filtered;
}
/**
* Reorder filtered data based on order value
*/
protected sortFilteredData() {
const columns: string[] = [];
const order: string[] = [];
this.order.forEach((value) => {
const splitted = value.split('.');
columns.push(splitted[0]);
order.push(splitted[1]);
});
this.sortArray(this.filteredData, columns, order);
}
/**
* Adds a new row to datasource
* @param row Row to create
* @returns Promise with added row
*/
public async post(row: IDictionary<any>): Promise<any> {
this.allData = this.allData.concat(row);
return row;
}
/**
* Updates a datasource row using unique key
* @param row Row to update
* @returns Promise with updated row
* @throws Will throw if row doesn't exists
*/
public async put(row: IDictionary<any>): Promise<any> {
const index = this.allData.findIndex((dataRow) => dataRow[this.uniqueKey] === row[this.uniqueKey]);
if (index !== -1) {
this.allData[index] = row;
return row;
}
throw new Error(`Row with id ${row[this.uniqueKey]} not found`);
}
/**
* Deletes a datasource row using unique key
* @param row Row to delete
* @returns Promise with deleted row
* @throws Will throw if row doesn't exists
*/
public async delete(row: IDictionary<any>): Promise<any> {
const index = this.allData.findIndex((dataRow) => dataRow[this.uniqueKey] === row[this.uniqueKey]);
if (index !== -1) {
this.allData.splice(index, 1);
if (this.currentRow[this.uniqueKey] === row[this.uniqueKey]) {
this.currentRow = {};
}
return row;
}
return Promise.reject(new Error(`Row with id ${row[this.uniqueKey]} not found`));
}
/**
* Sorts the data collection using the same principles of ordering in databases
* @param array Data collection
* @param columns Columns used to oreder the collection
* @param types Order orientation. All values must be asc or desc
*/
protected sortArray(collection: IDictionary<any>[], columns: string[], types: string[]) {
collection.sort((row, nextRow) => this.sort(row, nextRow, columns, types));
}
/**
* Custom sort for collections
* @param row Collection row
* @param nextRow Next row from collection
* @param columns Columns used to oreder the collection
* @param types Order orientation. All values must be asc or desc
* @param index Columns and types position
* @returns Row's position
*/
protected sort(
row: IDictionary<any>,
nextRow: IDictionary<any>,
columns: string[],
types: string[],
index = 0,
): number {
if (row[columns[index]] === nextRow[columns[index]]) {
const nextIndex = index + 1;
if (Object.prototype.hasOwnProperty.call(columns, nextIndex)) {
return this.sort(row, nextRow, columns, types, nextIndex);
}
return this.orderTypes.same;
}
if (this.sortFunction instanceof Function) {
if (this.sortFunction(row[columns[index]], nextRow[columns[index]], columns[index])) {
return this.orderTypes[types[index]];
}
return this.orderTypes[types[index]] * -1;
}
let rowValue = row[columns[index]];
let nextRowValue = nextRow[columns[index]];
if (this.sortParams[columns[index]]) {
rowValue = this.convertSortValue(rowValue, this.sortParams[columns[index]]);
nextRowValue = this.convertSortValue(nextRowValue, this.sortParams[columns[index]]);
}
if (rowValue > nextRowValue) {
return this.orderTypes[types[index]];
}
return this.orderTypes[types[index]] * -1;
}
protected convertSortValue(value: any, sortParam: any) {
const columnType = typeof sortParam === 'string' ? sortParam : sortParam.type;
if (columnType === 'number') {
return parseFloat(value);
}
if (columnType === 'date') {
const dateFormat = sortParam.dateFormat || Config.dateFormat;
return dayjs(value.toString(), dateFormat).toDate();
}
if (columnType === 'string') {
let sortValue = value.toString();
if (sortParam.caseInsensitive) sortValue = sortValue.toLowerCase();
if (sortParam.normalize) sortValue = Utils.normalize(sortValue);
return sortValue;
}
return value;
}
/**
* Translate all data.
*/
protected translateData() {
if (!this.translate) return;
this.allData = this.allData.map((row, index) => this.translateRow(row, index));
}
/**
* Translate row
* @param row Row to translate
* @param index Row index
*/
protected translateRow(row: IDictionary<any>, index: number) {
Object.keys(row).forEach((key) => {
if (key === this.uniqueKey) return;
if (typeof row[key] !== 'string') return;
if (!this.originalValues[index]) this.originalValues[index] = {};
if (this.translate === true || (this.translate as string[]).indexOf(key) !== -1) {
if (!this.originalValues[index][key]) this.originalValues[index][key] = row[key];
row[key] = I18n.translate(this.originalValues[index][key]);
}
});
return row;
}
public destroy() {
I18n.unregisterChangeListener(this.translateData);
this.originalValues = [];
}
public clone(): IMemoryDatasource {
return {
...super.clone(),
data: this.allData,
translate: this.translate,
type: 'memory',
};
}
}
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