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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 | 963x 963x 963x 641x 9x 641x 656x 656x 656x 656x 656x 650x 6x 656x 6x 6x | import { Observable, of } from 'rxjs';
import { IEnvironment } from 'src/environments/interface/ienvironment';
import { LogPublisher } from '../publisher/log-publisher';
import { LogEntry } from '../../logEntry/logEntry';
/** Local storage {@link LogPublisher}. Used to log in local storage. */
export class LogLocalStorage extends LogPublisher {
/** Max number of elements in local storage */
maxSize;
/** Log local storage publisher constructor. */
constructor(environment: IEnvironment) {
// Must call `super()`from derived classes
super();
// Set location
this.location = 'logging';
this.maxSize = environment.production ? 100 : 1000;
}
/**
* Push a {@link LogEntry} in an array if the array is small enough, but shift
* all the values otherwise. Used to ensure the localStorage size doesn't
* increase above the set limit.
*
* @param values The array of {@link LogEntry}
* @param entry The {@link LogEntry} to push at the end of the array, after a
* shift if necessary
*/
pushOrShift(values: LogEntry[], entry: LogEntry) {
if (values.length >= this.maxSize) {
values.shift();
}
values.push(entry);
}
/**
* Method used to actually log a {@link LogEntry}. Returns
*
* @param entry The {@link LogEntry} to log
* @returns A boolean indicating if the entry was logged.
*/
log(entry: LogEntry): Observable<boolean> {
let ret = false;
let values: LogEntry[];
try {
// Get previous values from local storage
values = localStorage.getItem(this.location)
? JSON.parse(localStorage.getItem(this.location) as string)
: [];
// Add new log entry to array
this.pushOrShift(values, entry);
// Store array into local storage
localStorage.setItem(this.location, JSON.stringify(values, null, '\n'));
// Set return value
ret = true;
} catch (ex) {
// Display error in console
// eslint-disable-next-line no-console
console.log(ex);
}
return of(ret);
}
/** Method used to clear the local storage */
clear(): Observable<boolean> {
localStorage.removeItem(this.location);
return of(true);
}
}
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