2 * Core Service - egHatch
4 * Dispatches print and data storage requests to the appropriate handler.
6 * If Hatch is configured to honor the request -- current request types
7 * are 'settings', 'offline', and 'printing' -- the request will be
8 * relayed to the Hatch service. Otherwise, the request is handled
11 * Most handlers also provide direct remote and local variants to the
12 * application can decide to which to use as needed.
14 * Local storage requests are handled by $window.localStorage.
16 * Note that all top-level and remote requests return promises. All
17 * local requests return immediate values, since local requests are
20 * BEWARE: never store "fieldmapper" objects, since their structure
21 * may change over time as the IDL changes. Always flatten objects
22 * into key/value pairs before calling set*Item()
25 angular.module('egCoreMod')
28 ['$q','$window','$timeout','$interpolate','$cookies','egNet','$injector',
29 function($q , $window , $timeout , $interpolate , $cookies , egNet , $injector ) {
33 service.messages = {};
34 service.hatchAvailable = false;
35 service.auth = null; // ref to egAuth loaded on-demand to avoid circular ref.
36 service.disableServerSettings = false;
38 // key/value cache -- avoid unnecessary Hatch extension requests.
39 // Only affects *RemoteItem calls.
40 service.keyCache = {};
42 // Keep a local copy of all retrieved setting summaries, which indicate
43 // which setting types exist for each setting.
44 service.serverSettingSummaries = {};
47 * List string prefixes for On-Call storage keys. On-Call keys
48 * are those that can be set/get/remove'd from localStorage when
49 * Hatch is not avaialable, even though Hatch is configured as the
50 * primary storage location for the key in question. On-Call keys
51 * are those that allow the user to login and perform basic admin
52 * tasks (like disabling Hatch) even when Hatch is down.
53 * AKA Browser Staff Run Level 3.
54 * Note that no attempt is made to synchronize data between Hatch
55 * and localStorage for On-Call keys. Only one destation is active
56 * at a time and each maintains its own data separately.
58 service.onCallPrefixes = ['eg.workstation'];
60 // Returns true if the key can be set/get in localStorage even when
61 // Hatch is not available.
62 service.keyIsOnCall = function(key) {
64 angular.forEach(service.onCallPrefixes, function(pfx) {
65 if (key.match(new RegExp('^' + pfx)))
72 * Settings with these prefixes will always live in the browser.
74 service.browserOnlyPrefixes = [
78 'current_tag_table_marc21_biblio',
83 service.keyStoredInBrowser = function(key) {
85 if (service.disableServerSettings) {
86 // When server-side storage is disabled, treat every
87 // setting like it's stored locally.
91 var browserOnly = false;
92 service.browserOnlyPrefixes.forEach(function(pfx) {
93 if (key.match(new RegExp('^' + pfx)))
100 // write a message to the Hatch port
101 service.sendToHatch = function(msg) {
104 // shallow copy and scrub msg before sending
105 angular.forEach(msg, function(val, key) {
106 if (key.match(/deferred/)) return;
110 console.debug("sending to Hatch: " + JSON.stringify(msg2));
113 $window.postMessage(msg2, $window.location.origin);
116 // Send request to Hatch or reject if Hatch is unavailable
117 service.attemptHatchDelivery = function(msg) {
118 msg.msgid = service.msgId++;
119 msg.deferred = $q.defer();
121 if (service.hatchAvailable) {
122 service.messages[msg.msgid] = msg;
123 service.sendToHatch(msg);
127 'Hatch request attempted but Hatch is not available');
128 msg.deferred.reject(msg);
131 return msg.deferred.promise;
135 // resolve the promise on the given request and remove
136 // it from our tracked requests.
137 service.resolveRequest = function(msg) {
139 if (!service.messages[msg.msgid]) {
140 console.error('no cached message for id = ' + msg.msgid);
144 // for requests sent through Hatch, only the cached
145 // request will have the original promise attached
146 msg.deferred = service.messages[msg.msgid].deferred;
147 delete service.messages[msg.msgid]; // un-cache
149 if (msg.status == 200) {
150 msg.deferred.resolve(msg.content);
152 console.warn("Hatch command failed with status="
153 + msg.status + " and message=" + msg.message);
154 msg.deferred.reject();
158 service.openHatch = function() {
160 // When the Hatch extension loads, it tacks an attribute onto
161 // the top-level documentElement to indicate it's available.
162 if (!$window.document.documentElement.getAttribute('hatch-is-open')) {
163 //console.debug("Hatch is not available");
167 $window.addEventListener("message", function(event) {
168 // We only accept messages from our own content script.
169 if (event.source != window) return;
171 // We only care about messages from the Hatch extension.
172 if (event.data && event.data.from == 'extension') {
174 // Avoid logging full Hatch responses. they can get large.
176 'Hatch responded to message ID ' + event.data.msgid);
178 service.resolveRequest(event.data);
182 service.hatchAvailable = true; // public flag
185 service.remotePrint = function(
186 context, contentType, content, withDialog) {
188 return service.getPrintConfig(context).then(
190 // print configuration retrieved; print
191 return service.attemptHatchDelivery({
195 contentType : contentType,
196 showDialog : withDialog,
202 service.getPrintConfig = function(context) {
203 return service.getRemoteItem('eg.print.config.' + context);
206 service.setPrintConfig = function(context, config) {
207 return service.setRemoteItem('eg.print.config.' + context, config);
210 service.getPrinterOptions = function(name) {
211 return service.attemptHatchDelivery({
212 action : 'printer-options',
217 service.getPrinters = function() {
218 if (service.printers) // cached printers
219 return $q.when(service.printers);
221 return service.attemptHatchDelivery({action : 'printers'}).then(
223 // we have remote printers; sort by name and return
225 service.printers = printers.sort(
226 function(a,b) {return a.name < b.name ? -1 : 1});
227 return service.printers;
230 // remote call failed and there is no such thing as local
231 // printers; return empty set.
232 function() { return [] }
236 service.usePrinting = function() {
237 return service.getLocalItem('eg.hatch.enable.printing');
240 service.useSettings = function() {
241 return service.getLocalItem('eg.hatch.enable.settings');
244 service.useOffline = function() {
245 return service.getLocalItem('eg.hatch.enable.offline');
248 // get the value for a stored item
249 service.getItem = function(key) {
251 if (!service.keyStoredInBrowser(key)) {
252 return service.getServerItem(key);
255 var deferred = $q.defer();
257 service.getBrowserItem(key).then(
258 function(val) { deferred.resolve(val); },
260 function() { // Hatch error
261 if (service.keyIsOnCall(key)) {
262 console.warn("Unable to getItem from Hatch: " + key +
263 ". Retrieving item from local storage instead");
264 deferred.resolve(service.getLocalItem(key));
267 deferred.reject("Unable to getItem from Hatch: " + key);
271 return deferred.promise;
274 service.getBrowserItem = function(key) {
275 if (service.useSettings()) {
276 if (service.hatchAvailable) {
277 return service.getRemoteItem(key);
280 return $q.when(service.getLocalItem(key));
285 service.getRemoteItem = function(key) {
287 if (service.keyCache[key] != undefined)
288 return $q.when(service.keyCache[key])
290 return service.attemptHatchDelivery({
293 }).then(function(content) {
294 return service.keyCache[key] = content;
298 service.getLocalItem = function(key) {
299 var val = $window.localStorage.getItem(key);
300 if (val === null || val === undefined) return;
302 return JSON.parse(val);
305 "Deleting invalid JSON for localItem: " + key + " => " + val);
306 service.removeLocalItem(key);
311 service.getLoginSessionItem = function(key) {
312 var val = $cookies.get(key);
313 if (val == null) return;
314 return JSON.parse(val);
317 service.getSessionItem = function(key) {
318 var val = $window.sessionStorage.getItem(key);
319 if (val == null) return;
320 return JSON.parse(val);
324 * @param tmp bool Store the value as a session cookie only.
325 * tmp values are removed during logout or browser close.
327 service.setItem = function(key, value) {
329 if (!service.keyStoredInBrowser(key)) {
330 return service.setServerItem(key, value);
333 var deferred = $q.defer();
334 service.setBrowserItem(key, value).then(
335 function(val) {deferred.resolve(val);},
337 function() { // Hatch error
339 if (service.keyIsOnCall(key)) {
340 console.warn("Unable to setItem in Hatch: " +
341 key + ". Setting in local storage instead");
343 deferred.resolve(service.setLocalItem(key, value));
345 deferred.reject("Unable to setItem in Hatch: " + key);
350 service.setBrowserItem = function(key, value) {
351 if (service.useSettings()) {
352 if (service.hatchAvailable) {
353 return service.setRemoteItem(key, value);
355 return $q.reject('Unable to get item from hatch');
358 return $q.when(service.setLocalItem(key, value));
362 service.setServerItem = function(key, value) {
363 if (!service.auth) service.auth = $injector.get('egAuth');
364 if (!service.auth.token()) return $q.when();
366 // If we have already attempted to retrieve a value for this
367 // setting, then we can tell up front whether applying a value
368 // at the server will be an option. If not, store locally.
369 var summary = service.serverSettingSummaries[key];
370 if (summary && !summary.has_staff_setting) {
372 if (summary.has_org_setting === 't') {
373 // When no user/ws setting types exist but an org unit
374 // setting type does, it means the value cannot be
375 // applied by an individual user. Nothing left to do.
379 // No setting types of any flavor exist.
380 // Fall back to local storage.
382 if (value === null) {
383 // a null value means clear the server setting.
384 return service.removeBrowserItem(key);
386 console.warn('No server setting type exists for ' + key);
387 return service.setBrowserItem(key, value);
392 settings[key] = value;
394 return egNet.request(
396 'open-ils.actor.settings.apply.user_or_ws',
397 service.auth.token(), settings
398 ).then(function(appliedCount) {
400 if (appliedCount == 0) {
401 console.warn('No server setting type exists for ' + key);
402 // We were unable to store the setting on the server,
403 // presumably becuase no server-side setting type exists.
404 // Add to local storage instead.
405 service.setLocalItem(key, value);
408 service.keyCache[key] = value;
413 service.getServerItem = function(key) {
414 if (key in service.keyCache) {
415 return $q.when(service.keyCache[key])
418 if (!service.auth) service.auth = $injector.get('egAuth');
419 if (!service.auth.token()) return $q.when(null);
421 return egNet.request(
423 'open-ils.actor.settings.retrieve.atomic',
424 [key], service.auth.token()
425 ).then(function(settings) {
426 return service.handleServerItemResponse(settings[0]);
430 service.handleServerItemResponse = function(summary) {
431 var key = summary.name;
432 var val = summary.value;
434 // For our purposes, we only care if a setting can be stored
435 // as an org setting or a user-or-workstation setting.
436 summary.has_staff_setting = (
437 summary.has_user_setting === 't' ||
438 summary.has_workstation_setting === 't'
441 summary.value = null; // avoid duplicate value caches
442 service.serverSettingSummaries[key] = summary;
445 // We have a server setting. Nothing left to do.
446 return $q.when(service.keyCache[key] = val);
449 if (!summary.has_staff_setting) {
451 if (summary.has_org_setting === 't') {
452 // An org unit setting type exists but no value is applied
453 // that this workstation has access to. The existence of
454 // an org unit setting type and no user/ws setting type
455 // means applying a value locally is not allowed.
456 return $q.when(service.keyCache[key] = undefined);
459 console.warn('No server setting type exists for '
460 + key + ', using local value.');
462 return service.getBrowserItem(key);
465 // A user/ws setting type exists, but no server value exists.
466 // Migrate the local setting to the server.
468 var deferred = $q.defer();
469 service.getBrowserItem(key).then(function(browserVal) {
471 if (browserVal === null || browserVal === undefined) {
472 // No local value to migrate.
473 return deferred.resolve(service.keyCache[key] = undefined);
476 // Migrate the local value to the server.
478 service.setServerItem(key, browserVal).then(
479 function(appliedCount) {
480 if (appliedCount == 1) {
481 console.info('setting ' + key + ' successfully ' +
482 'migrated to a server setting');
483 service.removeBrowserItem(key); // fire & forget
485 console.error('error migrating setting to server,'
486 + ' falling back to local value');
488 deferred.resolve(service.keyCache[key] = browserVal);
493 return deferred.promise;
496 service.getServerItemBatch = function(keys) {
497 // no cache checking for now. assumes batch mode is only
498 // called once on page load. maybe add cache checking later.
499 if (!service.auth) service.auth = $injector.get('egAuth');
500 if (!service.auth.token()) return $q.when({});
502 var foundValues = {};
503 return egNet.request(
505 'open-ils.actor.settings.retrieve',
506 keys, service.auth.token()
508 function() { return foundValues; },
511 var val = setting.value();
512 // The server returns null for undefined settings.
513 // Treat as undefined locally for backwards compat.
514 service.keyCache[setting.name()] =
515 foundValues[setting.name()] =
516 (val === null) ? undefined : val;
522 // set the value for a stored or new item
523 service.setRemoteItem = function(key, value) {
524 service.keyCache[key] = value;
525 return service.attemptHatchDelivery({
532 // Set the value for the given key.
533 // "Local" items persist indefinitely.
534 // If the value is raw, pass it as 'value'. If it was
535 // externally JSONified, pass it via jsonified.
536 service.setLocalItem = function(key, value, jsonified) {
537 if (jsonified === undefined ) {
538 jsonified = JSON.stringify(value);
539 } else if (value === undefined) {
542 $window.localStorage.setItem(key, jsonified);
545 service.appendItem = function(key, value) {
546 if (!service.useSettings())
547 return $q.when(service.appendLocalItem(key, value));
549 if (service.hatchAvailable)
550 return service.appendRemoteItem(key, value);
552 if (service.keyIsOnCall(key)) {
553 console.warn("Unable to appendItem in Hatch: " +
554 key + ". Setting in local storage instead");
556 return $q.when(service.appendLocalItem(key, value));
559 console.error("Unable to appendItem in Hatch: " + key);
563 // append the value to a stored or new item
564 service.appendRemoteItem = function(key, value) {
565 service.keyCache[key] = value;
566 return service.attemptHatchDelivery({
573 service.appendLocalItem = function(key, value, jsonified) {
574 if (jsonified === undefined )
575 jsonified = JSON.stringify(value);
577 var old_value = $window.localStorage.getItem(key) || '';
578 $window.localStorage.setItem( key, old_value + jsonified );
581 // Set the value for the given key.
582 // "LoginSession" items are removed when the user logs out or the
583 // browser is closed.
584 // If the value is raw, pass it as 'value'. If it was
585 // externally JSONified, pass it via jsonified.
586 service.setLoginSessionItem = function(key, value, jsonified) {
587 service.addLoginSessionKey(key);
588 if (jsonified === undefined )
589 jsonified = JSON.stringify(value);
590 $cookies.put(key, jsonified);
593 // Set the value for the given key.
594 // "Session" items are browser tab-specific and are removed when the
596 // If the value is raw, pass it as 'value'. If it was
597 // externally JSONified, pass it via jsonified.
598 service.setSessionItem = function(key, value, jsonified) {
599 if (jsonified === undefined )
600 jsonified = JSON.stringify(value);
601 $window.sessionStorage.setItem(key, jsonified);
604 // remove a stored item
605 service.removeItem = function(key) {
607 if (!service.keyStoredInBrowser(key)) {
608 return service.removeServerItem(key);
611 var deferred = $q.defer();
612 service.removeBrowserItem(key).then(
613 function(response) {deferred.resolve(response);},
614 function() { // Hatch error
616 if (service.keyIsOnCall(key)) {
617 console.warn("Unable to removeItem from Hatch: " + key +
618 ". Removing item from local storage instead");
620 deferred.resolve(service.removeLocalItem(key));
623 deferred.reject("Unable to removeItem from Hatch: " + key);
627 return deferred.promise;
630 service.removeBrowserItem = function(key) {
631 if (service.useSettings()) {
632 if (service.hatchAvailable) {
633 return service.removeRemoteItem(key);
635 return $q.reject('error talking to Hatch');
638 return $q.when(service.removeLocalItem(key));
642 service.removeServerItem = function(key) {
643 return service.setServerItem(key, null);
646 service.removeRemoteItem = function(key) {
647 delete service.keyCache[key];
648 return service.attemptHatchDelivery({
654 service.removeLocalItem = function(key) {
655 $window.localStorage.removeItem(key);
658 service.removeLoginSessionItem = function(key) {
659 service.removeLoginSessionKey(key);
660 $cookies.remove(key);
663 service.removeSessionItem = function(key) {
664 $window.sessionStorage.removeItem(key);
668 * Remove all "LoginSession" items.
670 service.clearLoginSessionItems = function() {
671 angular.forEach(service.getLoginSessionKeys(), function(key) {
672 service.removeLoginSessionItem(key);
675 // remove the keys cache.
676 service.removeLocalItem('eg.hatch.login_keys');
679 // if set, prefix limits the return set to keys starting with 'prefix'
680 service.getKeys = function(prefix) {
681 if (service.useSettings())
682 return service.getRemoteKeys(prefix);
683 return $q.when(service.getLocalKeys(prefix));
686 service.getRemoteKeys = function(prefix) {
687 return service.attemptHatchDelivery({
693 service.getServerKeys = function(prefix) {
696 service.serverSettings.forEach(function(k) {
697 // key prefix match test
698 if (prefix && k.substr(0, prefix.length) != prefix) {
703 // these may eventually come from the server, so return a promise.
704 return $q.when(keys);
707 service.getLocalKeys = function(prefix) {
710 while ( (k = $window.localStorage.key(idx++)) !== null) {
711 // key prefix match test
712 if (prefix && k.substr(0, prefix.length) != prefix) continue;
720 * Array of "LoginSession" keys.
721 * Note we have to store these as "Local" items so browser tabs can
722 * share them. We could store them as cookies, but it's more data
723 * that has to go back/forth to the server. A "LoginSession" key name is
724 * not private, though, so it's OK if they are left in localStorage
725 * until the next login.
727 service.getLoginSessionKeys = function(prefix) {
730 var login_keys = service.getLocalItem('eg.hatch.login_keys') || [];
731 angular.forEach(login_keys, function(k) {
732 // key prefix match test
733 if (prefix && k.substr(0, prefix.length) != prefix) return;
739 service.addLoginSessionKey = function(key) {
740 var keys = service.getLoginSessionKeys();
741 if (keys.indexOf(key) < 0) {
743 service.setLocalItem('eg.hatch.login_keys', keys);
747 service.removeLoginSessionKey = function(key) {
748 var keys = service.getLoginSessionKeys().filter(function(k) {
751 service.setLocalItem('eg.hatch.login_keys', keys);
754 // Copy all stored settings from localStorage to Hatch.
755 // If 'move' is true, delete the local settings once cloned.
756 service.copySettingsToHatch = function(move) {
757 var deferred = $q.defer();
758 var keys = service.getLocalKeys();
760 angular.forEach(keys, function(key) {
762 // Hatch keys are local-only
763 if (key.match(/^eg.hatch/)) return;
765 console.debug("Copying to Hatch Storage: " + key);
766 service.setRemoteItem(key, service.getLocalItem(key))
767 .then(function() { // key successfully cloned.
769 // delete the local copy if requested.
770 if (move) service.removeLocalItem(key);
772 // resolve the promise after processing the last key.
773 if (key == keys[keys.length-1])
778 return deferred.promise;
781 // Copy all stored settings from Hatch to localStorage.
782 // If 'move' is true, delete the Hatch settings once cloned.
783 service.copySettingsToLocal = function(move) {
784 var deferred = $q.defer();
786 service.getRemoteKeys().then(function(keys) {
787 angular.forEach(keys, function(key) {
788 service.getRemoteItem(key).then(function(val) {
790 console.debug("Copying to Local Storage: " + key);
791 service.setLocalItem(key, val);
793 // delete the remote copy if requested.
794 if (move) service.removeRemoteItem(key);
796 // resolve the promise after processing the last key.
797 if (key == keys[keys.length-1])
803 return deferred.promise;
806 // The only requirement for opening Hatch is that the DOM be loaded.
807 // Open the connection now so its state will be immediately available.