Add some basic support for Linked Data (Structured Email) #1422

dev/Common/Html.js

@@ -1,5 +1,5 @@
 import { createElement } from 'Common/Globals';
-import { forEachObjectEntry, pInt } from 'Common/Utils';
+import { forEachObjectEntry, isArray, pInt } from 'Common/Utils';
 import { SettingsUserStore } from 'Stores/User/Settings';
 
 const
@@ -207,7 +207,8 @@ export const
 			bqLevel = parseInt(SettingsUserStore.maxBlockquotesLevel()),
 
 			result = {
-				hasExternals: false
+				hasExternals: false,
+				linkedData: []
 			},
 
 			findAttachmentByCid = cId => oAttachments.findByCid(cId),
@@ -269,6 +270,7 @@ export const
 			// Not supported by <template> element
 //			.replace(/<!doctype[^>]*>/gi, '')
 //			.replace(/<\?xml[^>]*\?>/gi, '')
+			.replace(/<(\/?)head(\s[^>]*)?>/gi, '')
 			.replace(/<(\/?)body(\s[^>]*)?>/gi, '<$1div class="mail-body"$2>')
 //			.replace(/<\/?(html|head)[^>]*>/gi, '')
 			// Fix Reddit https://github.com/the-djmaze/snappymail/issues/540
@@ -284,6 +286,21 @@ export const
 			nodeIterator.referenceNode.remove();
 		}
 
+		/**
+		 * Basic support for Linked Data (Structured Email)
+		 * https://json-ld.org/
+		 * https://structured.email/
+		 **/
+		tmpl.content.querySelectorAll('script[type="application/ld+json"]').forEach(oElement => {
+			// Could be array of objects or single object
+			try {
+				const data = JSON.parse(oElement.textContent);
+				(isArray(data) ? data : [data]).forEach(entry => result.linkedData.push(entry));
+			} catch (e) {
+				console.error(e, oElement.textContent);
+			}
+		});
+
 		tmpl.content.querySelectorAll(
 			disallowedTags
 			+ (0 < bqLevel ? ',' + (new Array(1 + bqLevel).fill('blockquote').join(' ')) : '')

dev/Model/Message.js

@@ -87,6 +87,12 @@ export class MessageModel extends AbstractModel {
 			size: 0,
 			readReceipt: '',
 			preview: null,
+			/**
+			 * Basic support for Linked Data (Structured Email)
+			 * https://json-ld.org/
+			 * https://structured.email/
+			 **/
+			linkedData: [],
 
 			attachments: ko.observableArray(new AttachmentCollectionModel),
 			threads: ko.observableArray(),
@@ -367,6 +373,7 @@ export class MessageModel extends AbstractModel {
 				let result = msgHtml(this);
 				this.hasExternals(result.hasExternals);
 				this.hasImages(!!result.hasExternals);
+				this.linkedData = result.linkedData;
 				body.innerHTML = result.html;
 				if (!this.isSpam && FolderUserStore.spamFolder() != this.folder) {
 					if ('always' === SettingsUserStore.viewImages()) {

dev/View/Popup/Compose.js

@@ -1415,7 +1415,13 @@ export class ComposePopupView extends AbstractViewPopup {
 				// Only used at send, not at save:
 				dsn: this.requestDsn() ? 1 : 0,
 				requireTLS: this.requireTLS() ? 1 : 0,
-				readReceiptRequest: this.requestReadReceipt() ? 1 : 0
+				readReceiptRequest: this.requestReadReceipt() ? 1 : 0,
+				/**
+				 * Basic support for Linked Data (Structured Email)
+				 * https://json-ld.org/
+				 * https://structured.email/
+				 **/
+				linkedData: []
 			},
 			recipients = draft ? [identity.email()] : this.allRecipients(),
 			sign = !draft && this.pgpSign() && this.canPgpSign(),