1 import {Injectable} from '@angular/core';
2 import {Observable, Observer} from 'rxjs';
3 import {IdlService, IdlObject} from './idl.service';
4 import {NetService, NetRequest} from './net.service';
5 import {AuthService} from './auth.service';
7 // Externally defined. Used here for debugging.
8 declare var js2JSON: (jsThing: any) => string;
9 declare var OpenSRF: any; // creating sessions
11 interface PcrudReqOps {
12 authoritative?: boolean;
16 // If true, link-type fields which link to a class that defines a
17 // selector will be fleshed with the linked value. This affects
18 // retrieve(), retrieveAll(), and search() calls.
19 fleshSelectors?: boolean;
22 // For for documentation purposes.
23 type PcrudResponse = any;
25 export class PcrudContext {
27 static verboseLogging = true; //
28 static identGenerator = 0; // for debug logging
30 private ident: number;
31 private authoritative: boolean;
32 private xactCloseMode: string;
33 private cudIdx: number;
34 private cudAction: string;
35 private cudLast: PcrudResponse;
36 private cudList: IdlObject[];
38 private idl: IdlService;
39 private net: NetService;
40 private auth: AuthService;
42 // Tracks nested CUD actions
43 cudObserver: Observer<PcrudResponse>;
45 session: any; // OpenSRF.ClientSession
47 constructor( // passed in by parent service -- not injected
55 this.xactCloseMode = 'rollback';
56 this.ident = PcrudContext.identGenerator++;
57 this.session = new OpenSRF.ClientSession('open-ils.pcrud');
61 return '[PCRUDContext ' + this.ident + ']';
64 log(msg: string): void {
65 if (PcrudContext.verboseLogging) {
66 console.debug(this + ': ' + msg);
70 err(msg: string): void {
71 console.error(this + ': ' + msg);
74 token(reqOps?: PcrudReqOps): string {
75 return (reqOps && reqOps.anonymous) ?
76 'ANONYMOUS' : this.auth.token();
79 connect(): Promise<PcrudContext> {
81 return new Promise( (resolve, reject) => {
82 this.session.connect({
83 onconnect : () => { resolve(this); }
89 this.log('disconnect');
90 this.session.disconnect();
93 // Adds "flesh" logic to retrieve linked values for all fields
94 // that link to a class which defines a selector field.
95 applySelectorFleshing(fmClass: string, pcrudOps: any) {
96 pcrudOps = pcrudOps || {};
98 if (!pcrudOps.flesh) {
102 if (!pcrudOps.flesh_fields) {
103 pcrudOps.flesh_fields = {};
106 this.idl.classes[fmClass].fields
108 f.datatype === 'link' && (
109 f.reltype === 'has_a' || f.reltype === 'might_have'
112 const selector = this.idl.getLinkSelector(fmClass, field.name);
113 if (!selector) { return; }
115 if (!pcrudOps.flesh_fields[fmClass]) {
116 pcrudOps.flesh_fields[fmClass] = [];
119 if (pcrudOps.flesh_fields[fmClass].indexOf(field.name) < 0) {
120 pcrudOps.flesh_fields[fmClass].push(field.name);
125 retrieve(fmClass: string, pkey: Number | string,
126 pcrudOps?: any, reqOps?: PcrudReqOps): Observable<PcrudResponse> {
127 reqOps = reqOps || {};
128 this.authoritative = reqOps.authoritative || false;
129 if (reqOps.fleshSelectors) {
130 this.applySelectorFleshing(fmClass, pcrudOps);
132 return this.dispatch(
133 `open-ils.pcrud.retrieve.${fmClass}`,
134 [this.token(reqOps), pkey, pcrudOps]);
137 retrieveAll(fmClass: string, pcrudOps?: any,
138 reqOps?: PcrudReqOps): Observable<PcrudResponse> {
140 search[this.idl.classes[fmClass].pkey] = {'!=' : null};
141 return this.search(fmClass, search, pcrudOps, reqOps);
144 search(fmClass: string, search: any,
145 pcrudOps?: any, reqOps?: PcrudReqOps): Observable<PcrudResponse> {
146 reqOps = reqOps || {};
147 this.authoritative = reqOps.authoritative || false;
149 const returnType = reqOps.idlist ? 'id_list' : 'search';
150 let method = `open-ils.pcrud.${returnType}.${fmClass}`;
152 if (reqOps.atomic) { method += '.atomic'; }
154 if (reqOps.fleshSelectors) {
155 this.applySelectorFleshing(fmClass, pcrudOps);
158 return this.dispatch(method, [this.token(reqOps), search, pcrudOps]);
161 create(list: IdlObject | IdlObject[]): Observable<PcrudResponse> {
162 return this.cud('create', list);
164 update(list: IdlObject | IdlObject[]): Observable<PcrudResponse> {
165 return this.cud('update', list);
167 remove(list: IdlObject | IdlObject[]): Observable<PcrudResponse> {
168 return this.cud('delete', list);
170 autoApply(list: IdlObject | IdlObject[]): Observable<PcrudResponse> { // RENAMED
171 return this.cud('auto', list);
174 xactClose(): Observable<PcrudResponse> {
175 return this.sendRequest(
176 'open-ils.pcrud.transaction.' + this.xactCloseMode,
181 xactBegin(): Observable<PcrudResponse> {
182 return this.sendRequest(
183 'open-ils.pcrud.transaction.begin', [this.token()]
187 private dispatch(method: string, params: any[]): Observable<PcrudResponse> {
188 if (this.authoritative) {
189 return this.wrapXact(() => {
190 return this.sendRequest(method, params);
193 return this.sendRequest(method, params);
201 // => xact_close(commit/rollback)
203 wrapXact(mainFunc: () => Observable<PcrudResponse>): Observable<PcrudResponse> {
204 return Observable.create(observer => {
209 // 2. start the transaction
210 .then(() => this.xactBegin().toPromise())
212 // 3. execute the main body
215 mainFunc().subscribe(
216 res => observer.next(res),
217 err => observer.error(err),
219 this.xactClose().toPromise().then(() => {
231 private sendRequest(method: string,
232 params: any[]): Observable<PcrudResponse> {
234 // this.log(`sendRequest(${method})`);
236 return this.net.requestCompiled(
238 'open-ils.pcrud', method, params, this.session)
242 private cud(action: string,
243 list: IdlObject | IdlObject[]): Observable<PcrudResponse> {
244 this.cudList = [].concat(list); // value or array
246 this.log(`CUD(): ${action}`);
249 this.cudAction = action;
250 this.xactCloseMode = 'commit';
252 return this.wrapXact(() => {
253 return Observable.create(observer => {
254 this.cudObserver = observer;
255 this.nextCudRequest();
261 * Loops through the list of objects to update and sends
262 * them one at a time to the server for processing. Once
263 * all are done, the cudObserver is resolved.
265 nextCudRequest(): void {
266 if (this.cudIdx >= this.cudList.length) {
267 this.cudObserver.complete();
271 let action = this.cudAction;
272 const fmObj = this.cudList[this.cudIdx++];
274 if (action === 'auto') {
275 if (fmObj.ischanged()) { action = 'update'; }
276 if (fmObj.isnew()) { action = 'create'; }
277 if (fmObj.isdeleted()) { action = 'delete'; }
279 if (action === 'auto') {
280 // object does not need updating; move along
281 this.nextCudRequest();
286 `open-ils.pcrud.${action}.${fmObj.classname}`,
287 [this.token(), fmObj]
289 res => this.cudObserver.next(res),
290 err => this.cudObserver.error(err),
291 () => this.nextCudRequest()
296 @Injectable({providedIn: 'root'})
297 export class PcrudService {
300 private idl: IdlService,
301 private net: NetService,
302 private auth: AuthService
305 // Pass-thru functions for one-off PCRUD calls
307 connect(): Promise<PcrudContext> {
308 return this.newContext().connect();
311 newContext(): PcrudContext {
312 return new PcrudContext(this.idl, this.net, this.auth);
315 retrieve(fmClass: string, pkey: Number | string,
316 pcrudOps?: any, reqOps?: PcrudReqOps): Observable<PcrudResponse> {
317 return this.newContext().retrieve(fmClass, pkey, pcrudOps, reqOps);
320 retrieveAll(fmClass: string, pcrudOps?: any,
321 reqOps?: PcrudReqOps): Observable<PcrudResponse> {
322 return this.newContext().retrieveAll(fmClass, pcrudOps, reqOps);
325 search(fmClass: string, search: any,
326 pcrudOps?: any, reqOps?: PcrudReqOps): Observable<PcrudResponse> {
327 return this.newContext().search(fmClass, search, pcrudOps, reqOps);
330 create(list: IdlObject | IdlObject[]): Observable<PcrudResponse> {
331 return this.newContext().create(list);
334 update(list: IdlObject | IdlObject[]): Observable<PcrudResponse> {
335 return this.newContext().update(list);
338 remove(list: IdlObject | IdlObject[]): Observable<PcrudResponse> {
339 return this.newContext().remove(list);
342 autoApply(list: IdlObject | IdlObject[]): Observable<PcrudResponse> {
343 return this.newContext().autoApply(list);