@illgrenoble/visa-print-client
Version:
[](https://badge.fury.io/js/%40illgrenoble%2Fvisa-print-client)
198 lines • 34.2 kB
JavaScript
import { Injectable } from "@angular/core";
import { BehaviorSubject } from "rxjs";
import { PrintEvent, ErrorEvent, PrintJobChunkEvent, PrintJobAvailableEvent } from "../models";
import io from 'socket.io-client';
import * as i0 from "@angular/core";
class VisaPrintService {
constructor() {
this._connections = [];
this._pdfDidOpen = false;
}
static { this._connectionCounter = 1; }
connect(data, connectionOptions) {
connectionOptions = connectionOptions || {};
const socketOptions = {
transports: ['websocket'],
timeout: 1000,
reconnection: true,
reconnectionDelayMax: 10000,
...connectionOptions
};
if (data.path) {
socketOptions.path = data.path;
}
if (data.token) {
socketOptions.auth = {
token: data.token
};
socketOptions.query = {
token: data.token
};
}
const connectionId = `print-connection-${VisaPrintService._connectionCounter++} `;
const location = window.location;
const protocol = location.protocol === 'https:' ? 'wss:' : 'ws:';
const hostname = location.hostname;
const port = location.port ? `:${location.port}` : '';
const host = data.host ? `${data.host}` : `${protocol}//${hostname}${port}`;
const socket = io(`${host}`, socketOptions);
const printEvents$ = new BehaviorSubject(new PrintEvent({ type: 'CONNECTING', connectionId }));
const connection = {
id: connectionId,
event$: printEvents$,
socket: socket,
jobs: new Map(),
printables: [],
};
this._connections.push(connection);
socket.on('connect', () => {
printEvents$.next(new PrintEvent({ type: 'CONNECTED', connectionId }));
});
socket.on('print_job_handled', (jobId) => {
connection.printables = connection.printables.filter(printable => printable.jobId !== jobId);
printEvents$.next(new PrintEvent({ type: 'PRINT_JOB_HANDLED', connectionId, jobId }));
});
socket.on('connect_error', (error) => {
printEvents$.next(new PrintEvent({ type: 'ERROR', connectionId, data: new ErrorEvent({ type: 'CONNECTION_ERROR', message: error.message }) }));
});
socket.on('disconnect', () => {
printEvents$.next(new PrintEvent({ type: 'DISCONNECTED', connectionId }));
});
socket.on('error', (error) => {
printEvents$.next(new PrintEvent({ type: 'ERROR', connectionId, data: new ErrorEvent({ type: 'ERROR', message: error.message }) }));
});
socket.on('exception', (e) => {
printEvents$.next(new PrintEvent({ type: 'ERROR', connectionId, data: new ErrorEvent({ type: 'EXCEPTION', message: e.message }) }));
});
socket.on('print_job_start', (jobId) => {
printEvents$.next(new PrintEvent({ type: 'PRINT_JOB_TRANSFER_STARTED', connectionId, jobId }));
});
socket.on('print_job_end', (jobId) => {
printEvents$.next(new PrintEvent({ type: 'PRINT_JOB_TRANSFER_TERMINATED', connectionId, jobId }));
});
socket.on('print_job_data', (printJob, ack) => {
const { jobId, chunkId, chunkCount, chunkLength, data } = printJob;
if (chunkLength !== data.length) {
console.error(`printer job data of chunk ${chunkId}/${chunkCount} for job ${jobId} ${printJob.fileName} has incorrect length`);
printEvents$.next(new PrintEvent({ type: 'ERROR', connectionId, data: new ErrorEvent({ type: 'ERROR', message: 'Incorrect data length in chunk' }) }));
ack(false);
return;
}
ack(true);
printEvents$.next(new PrintEvent({ type: 'PRINT_JOB_CHUNK_RECEIVED', connectionId, jobId, data: new PrintJobChunkEvent({ jobId, chunkId, chunkCount, chunkLength }) }));
this.handlePrintJob(connection, printJob);
});
return printEvents$;
}
disconnect(connectionId) {
const connection = this._connections.find(connection => connection.id === connectionId);
if (connection) {
connection.socket.disconnect();
}
this._connections = this._connections.filter(connection => connection.id !== connectionId);
}
enablePrinting(connectionId) {
const connection = this._connections.find(connection => connection.id === connectionId);
if (connection) {
connection.socket.emit('enable_print', null, (data) => {
connection.event$.next(new PrintEvent({ type: 'PRINT_ENABLED', connectionId }));
});
}
}
disablePrinting(connectionId) {
const connection = this._connections.find(connection => connection.id === connectionId);
if (connection) {
connection.socket.emit('disable_print', null, (data) => {
connection.event$.next(new PrintEvent({ type: 'PRINT_DISABLED', connectionId }));
});
}
}
openPrintable(connectionId, jobId) {
const connection = this._connections.find(connection => connection.id === connectionId);
if (connection) {
const printable = connection.printables.find(printable => printable.jobId === jobId);
if (printable) {
connection.socket.emit('print_job_handled', printable.jobId);
connection.printables = connection.printables.filter(printable => printable.jobId !== jobId);
this.openPDF(printable.data, connection, jobId);
}
}
}
initialiseReceiver() {
if (!this._iframe) {
this._iframe = document.createElement('iframe');
this._iframe.style.display = 'none';
document.body.appendChild(this._iframe);
this._iframe.onload = () => {
URL.revokeObjectURL(this._pdfUrl);
this._iframe.focus();
try {
this._iframe.contentWindow?.print();
this._pdfDidOpen = true;
}
catch (error) {
}
};
}
}
handlePrintJob(connection, printJob) {
const { jobId, chunkId, chunkCount } = printJob;
if (!connection.jobs.has(jobId)) {
connection.jobs.set(jobId, []);
}
connection.jobs.get(jobId)?.push(printJob);
if (chunkId === chunkCount) {
this.processJob(connection, printJob);
}
}
processJob(connection, printJob) {
const { jobId, chunkCount, fileLength, fileName } = printJob;
const chunks = connection.jobs.get(jobId);
if (chunks) {
// Remove from jobs
connection.jobs.delete(jobId);
// Concatenate all the data
if (chunks.length > 0 && chunks.length === chunkCount) {
const base64 = chunks.reduce((acc, chunk) => {
return acc + chunk.data;
}, '');
const data = atob(base64);
if (data.length === fileLength) {
connection.printables.push({ jobId, data });
connection.event$.next(new PrintEvent({ type: 'PRINT_JOB_AVAILABLE', connectionId: connection.id, data: new PrintJobAvailableEvent({ jobId, fileLength, fileName }) }));
}
else {
connection.event$.next(new PrintEvent({ type: 'ERROR', connectionId: connection.id, data: new ErrorEvent({ type: 'ERROR', message: 'Processes print data has inconsistent length' }) }));
}
}
}
}
openPDF(data, connection, jobId) {
// Convert to binary data
const bytes = new Uint8Array(data.length);
for (let i = 0; i < data.length; i++) {
bytes[i] = data.charCodeAt(i);
}
const blob = new Blob([bytes], { type: 'application/pdf' });
this._pdfUrl = URL.createObjectURL(blob);
this.initialiseReceiver();
// Set the pdf in the iframe
this._pdfDidOpen = false;
this._iframe.src = this._pdfUrl;
setTimeout(() => {
if (this._pdfDidOpen === false) {
connection.event$.next(new PrintEvent({ type: 'PRINT_DIALOG_FAILED', connectionId: connection.id, jobId }));
}
}, 200);
}
static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "16.2.7", ngImport: i0, type: VisaPrintService, deps: [], target: i0.ɵɵFactoryTarget.Injectable }); }
static { this.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: "12.0.0", version: "16.2.7", ngImport: i0, type: VisaPrintService, providedIn: 'root' }); }
}
export { VisaPrintService };
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "16.2.7", ngImport: i0, type: VisaPrintService, decorators: [{
type: Injectable,
args: [{
providedIn: 'root'
}]
}] });
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{Injectable} from \"@angular/core\";\nimport {BehaviorSubject, Observable, Subject} from \"rxjs\";\nimport {\n    PrintEvent,\n    PrintJob,\n    ErrorEvent,\n    PrintJobChunkEvent,\n    PrintJobAvailableEvent\n} from \"../models\";\nimport io from 'socket.io-client'\nimport * as SocketIOClient from 'socket.io-client'\nimport Socket = SocketIOClient.Socket;\nimport {ManagerOptions} from \"socket.io-client/build/esm/manager\";\nimport {SocketOptions} from \"socket.io-client/build/esm/socket\";\n\nexport type ConnectionData = {\n    host?: string;\n    path?: string;\n    token?: string;\n}\n\ntype Printable = {\n    jobId: number;\n    data: string;\n}\n\nexport type Connection = {\n    id: string;\n    socket: Socket;\n    event$: Subject<PrintEvent>;\n    jobs: Map<number, PrintJob[]>;\n    printables: Printable[];\n}\n\n@Injectable({\n    providedIn: 'root'\n})export class VisaPrintService {\n\n    private _connections: Connection[] = [];\n    private static _connectionCounter = 1;\n\n    private _iframe: HTMLIFrameElement;\n    private _pdfUrl: string;\n    private _pdfDidOpen = false;\n\n    public connect(data: ConnectionData, connectionOptions?: Partial<ManagerOptions & SocketOptions>): Observable<PrintEvent> {\n\n        connectionOptions = connectionOptions || {};\n        const socketOptions: Partial<ManagerOptions & SocketOptions> = {\n            transports: ['websocket'],\n            timeout: 1000,\n            reconnection: true,\n            reconnectionDelayMax: 10000,\n            ...connectionOptions\n        }\n\n        if (data.path) {\n            socketOptions.path = data.path;\n        }\n\n        if (data.token) {\n            socketOptions.auth = {\n                token: data.token\n            };\n            socketOptions.query = {\n                token: data.token\n            }\n        }\n\n        const connectionId = `print-connection-${VisaPrintService._connectionCounter++} `;\n\n        const location = window.location;\n        const protocol = location.protocol === 'https:' ? 'wss:' : 'ws:';\n        const hostname = location.hostname;\n        const port = location.port ? `:${location.port}` : '';\n\n        const host = data.host ? `${data.host}` : `${protocol}//${hostname}${port}`;\n        const socket = io(`${host}`, socketOptions);\n\n        const printEvents$ = new BehaviorSubject<PrintEvent>(new PrintEvent({type: 'CONNECTING', connectionId}));\n        const connection: Connection = {\n            id: connectionId,\n            event$: printEvents$,\n            socket: socket,\n            jobs: new Map<number, PrintJob[]>(),\n            printables: [],\n        };\n\n        this._connections.push(connection);\n\n        socket.on('connect', () => {\n            printEvents$.next(new PrintEvent({type: 'CONNECTED', connectionId}));\n        });\n\n        socket.on('print_job_handled', (jobId: number) => {\n            connection.printables = connection.printables.filter(printable => printable.jobId !== jobId);\n            printEvents$.next(new PrintEvent({type: 'PRINT_JOB_HANDLED', connectionId, jobId}));\n        });\n\n        socket.on('connect_error', (error) => {\n            printEvents$.next(new PrintEvent({type: 'ERROR', connectionId, data: new ErrorEvent({type: 'CONNECTION_ERROR', message: error.message})}));\n        });\n\n        socket.on('disconnect', () => {\n            printEvents$.next(new PrintEvent({type: 'DISCONNECTED', connectionId}));\n        });\n\n        socket.on('error', (error) => {\n            printEvents$.next(new PrintEvent({type: 'ERROR', connectionId, data: new ErrorEvent({type: 'ERROR', message: error.message})}));\n        });\n\n        socket.on('exception', (e) => {\n            printEvents$.next(new PrintEvent({type: 'ERROR', connectionId, data: new ErrorEvent({type: 'EXCEPTION', message: e.message})}));\n        });\n\n        socket.on('print_job_start', (jobId: number) => {\n            printEvents$.next(new PrintEvent({type: 'PRINT_JOB_TRANSFER_STARTED', connectionId, jobId}));\n        });\n\n        socket.on('print_job_end', (jobId: number) => {\n            printEvents$.next(new PrintEvent({type: 'PRINT_JOB_TRANSFER_TERMINATED', connectionId, jobId}));\n        });\n\n        socket.on('print_job_data', (printJob: PrintJob, ack) => {\n            const {jobId, chunkId, chunkCount, chunkLength, data} = printJob;\n            if (chunkLength !== data.length) {\n                console.error(`printer job data of chunk ${chunkId}/${chunkCount} for job ${jobId} ${printJob.fileName} has incorrect length`)\n                printEvents$.next(new PrintEvent({type: 'ERROR', connectionId, data: new ErrorEvent({type: 'ERROR', message: 'Incorrect data length in chunk'})}));\n                ack(false);\n                return;\n            }\n\n            ack(true);\n            printEvents$.next(new PrintEvent({type: 'PRINT_JOB_CHUNK_RECEIVED', connectionId, jobId, data: new PrintJobChunkEvent({jobId, chunkId, chunkCount, chunkLength})}));\n            this.handlePrintJob(connection, printJob);\n        });\n\n        return printEvents$;\n    }\n\n    public disconnect(connectionId: string): void {\n        const connection = this._connections.find(connection => connection.id === connectionId);\n        if (connection) {\n            connection.socket.disconnect();\n        }\n        this._connections = this._connections.filter(connection => connection.id !== connectionId);\n    }\n\n    public enablePrinting(connectionId: string): void {\n        const connection = this._connections.find(connection => connection.id === connectionId);\n        if (connection) {\n            connection.socket.emit('enable_print', null, (data: boolean) => {\n                connection.event$.next(new PrintEvent({type: 'PRINT_ENABLED', connectionId}));\n            });\n        }\n    }\n\n    public disablePrinting(connectionId: string): void {\n        const connection = this._connections.find(connection => connection.id === connectionId);\n        if (connection) {\n            connection.socket.emit('disable_print', null, (data: boolean) => {\n                connection.event$.next(new PrintEvent({type: 'PRINT_DISABLED', connectionId}));\n            });\n        }\n    }\n\n    public openPrintable(connectionId: string, jobId: number): void {\n        const connection = this._connections.find(connection => connection.id === connectionId);\n        if (connection) {\n            const printable = connection.printables.find(printable => printable.jobId === jobId);\n            if (printable) {\n                connection.socket.emit('print_job_handled', printable.jobId);\n                connection.printables = connection.printables.filter(printable => printable.jobId !== jobId);\n                this.openPDF(printable.data, connection, jobId);\n            }\n        }\n    }\n\n    private initialiseReceiver(): void {\n        if (!this._iframe) {\n            this._iframe = document.createElement('iframe');\n            this._iframe.style.display = 'none';\n            document.body.appendChild(this._iframe);\n            this._iframe.onload = () => {\n                URL.revokeObjectURL(this._pdfUrl);\n\n                this._iframe.focus();\n                try {\n                    this._iframe.contentWindow?.print();\n                    this._pdfDidOpen = true;\n\n                } catch (error) {\n                }\n            };\n        }\n    }\n\n    private handlePrintJob(connection: Connection, printJob: PrintJob): void {\n        const { jobId, chunkId, chunkCount } = printJob;\n        if (!connection.jobs.has(jobId)) {\n            connection.jobs.set(jobId, []);\n        }\n        connection.jobs.get(jobId)?.push(printJob);\n\n        if (chunkId === chunkCount) {\n            this.processJob(connection, printJob);\n        }\n    }\n\n    private processJob(connection: Connection, printJob: PrintJob): void {\n        const {jobId, chunkCount, fileLength, fileName} = printJob;\n        const chunks = connection.jobs.get(jobId);\n        if (chunks) {\n            // Remove from jobs\n            connection.jobs.delete(jobId);\n\n            // Concatenate all the data\n            if (chunks.length > 0 && chunks.length === chunkCount) {\n                const base64 = chunks.reduce((acc, chunk) => {\n                    return acc + chunk.data\n                }, '');\n\n                const data = atob(base64);\n                if (data.length === fileLength) {\n                    connection.printables.push({jobId, data})\n                    connection.event$.next(new PrintEvent({type: 'PRINT_JOB_AVAILABLE', connectionId: connection.id, data: new PrintJobAvailableEvent({jobId, fileLength, fileName})}));\n                } else {\n                    connection.event$.next(new PrintEvent({type: 'ERROR', connectionId: connection.id, data: new ErrorEvent({type: 'ERROR', message: 'Processes print data has inconsistent length'})}));\n                }\n            }\n        }\n    }\n\n    private openPDF(data: string, connection: Connection, jobId: number): void {\n        // Convert to binary data\n        const bytes = new Uint8Array(data.length);\n        for (let i = 0; i < data.length; i++) {\n            bytes[i] = data.charCodeAt(i);\n        }\n        const blob = new Blob([bytes], {type: 'application/pdf'});\n        this._pdfUrl = URL.createObjectURL(blob);\n\n        this.initialiseReceiver();\n\n        // Set the pdf in the iframe\n        this._pdfDidOpen = false;\n        this._iframe.src = this._pdfUrl;\n        setTimeout(() => {\n            if (this._pdfDidOpen === false) {\n                connection.event$.next(new PrintEvent({type: 'PRINT_DIALOG_FAILED', connectionId: connection.id, jobId}));\n            }\n        }, 200);\n\n    }\n}\n"]}