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import { Headers, Http, Response } from '@angular/http';
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import { IGetRowsParams } from 'ag-grid/main';
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import { Observable } from 'rxjs/Observable';
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import 'rxjs/add/operator/toPromise';
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import 'rxjs/add/operator/map';
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export abstract class StatementBaseService {
protected abstract url: string;
protected headers: Headers = new Headers({'Content-Type': 'application/json'});
constructor(protected http: Http) { }
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// getData2(from: number = 0, to: number = 100, sort: string = null): Promise<any[]> {
// let url: string = this.url;
// url += '?from=' + from + '&to=' + to;
// if (sort) {
// url += '&sort=' + sort;
// }
// return this.http.get(url)
// .toPromise()
// .then((response: Response) => this.parseModels(response.json()))
// .catch(this.handleError);
// }
getData(params: IGetRowsParams): Observable<any[]> {
let sort: string = null;
if (params.sortModel.length) {
sort = this.parseSort(params.sortModel[0]);
}
let url: string = this.url;
url += '?from=' + params.startRow + '&to=' + params.endRow;
if (sort) {
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url += '&sort=' + sort;
}
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let filter: string = this.parseFilter(params.filterModel);
if (filter) {
url += '&filter=' + filter;
}
return this.http.get(url)
.map((response: Response) => this.parseModels(response.json()));
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}
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update(id: number, data: string): Promise<any> {
return this.http.post(this.url + '/update?id=' + id, data, { headers: this.headers })
.toPromise()
.then((response: Response) => response.json())
.catch(this.handleError);
}
create(data: string): Promise<any> {
return this.http.post(this.url + '/create', data, { headers: this.headers })
.toPromise()
.then((response: Response) => this.parseModel(response.json()))
.catch(this.handleError);
}
delete(id: number): Promise<any> {
return this.http.delete(this.url + '/delete?id=' + id, { headers: this.headers })
.toPromise()
.then((response: Response) => response.json())
.catch(this.handleError);
}
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public abstract createModel(): Object;
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protected handleError(error: any): Promise<any> {
console.error('An error occured', error);
return Promise.reject(error.message || error);
}
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protected parseSort(sort: any): string {
if (sort.colId && sort.sort) {
let result = sort.colId;
if (sort.sort === 'desc') {
result = '-' + result;
}
return result;
}
return null;
}
protected parseFilter(filter: Object): string {
let result: string = '';
for (let property in filter) {
let value: string = filter[property].filter;
let operator: string = filter[property].type;
let symbol: string;
switch (operator) {
case 'contains':
symbol = '*';
break;
case 'equals':
symbol = '=';
break;
case 'not equals':
symbol = '!';
break;
case 'starts with':
symbol = '^';
break;
case 'ends with':
symbol = '$';
break;
default:
}
if (symbol.length) {
result += property + symbol + value + ';';
}
}
if (result.length) {
return result;
} else {
return null;
}
}
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protected abstract parseModels(json: any): any[];
protected abstract parseModel(json: any): any;
}
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