Fixing ISBN and adding Release date.

src/epub.js

@@ -85,6 +85,7 @@ class EpubOpf{
 <package xmlns="http://www.idpf.org/2007/opf"
          xmlns:dc="http://purl.org/dc/elements/1.1/"
          xmlns:dcterms="http://purl.org/dc/terms/"
+         xmlns:opf="http://www.idpf.org/2007/opf"
          unique-identifier="pub-id"
          version="3.0">
   <metadata>
@@ -99,10 +100,18 @@ class EpubOpf{
             cnt += `    <dc:description>${m.metadata.description}</dc:description>\n`
         }
         if (m.metadata.isbn){
-            cnt += `    <dc:identifier id="isbn">${m.metadata.isbn}</dc:identifier>\n`
+            cnt += `    <dc:identifier id="isbn" opf:scheme="ISBN">${m.metadata.isbn}</dc:identifier>\n`
             let onixcode = m.metadata.isbn.length > 10 ? '15' : '02'
             cnt += `    <meta refines="#isbn" property="identifier-type" scheme="onix:codelist5">${onixcode}</meta>\n`
         }
+        if (m.metadata.issued){
+            try {
+                let d = new Date(m.metadata.issued)
+                cnt += `    <dc:date>${d.toISOString()}</dc:date>\n`
+            } catch(e){
+                console.warn(`Release data is not valid: "${m.metadata.issued}"`)
+            }
+        }
         if (m.metadata.publisher){
             cnt += `    <dc:publisher>${m.metadata.publisher}</dc:publisher>\n`
         }
@@ -255,6 +264,7 @@ class EpubMeta{
         this.metadata = {
             book_id: 'book_id',
             isbn: null,
+            issued: null,
             title: 'title',
             language: 'en',
             author: [],
@@ -293,11 +303,14 @@ class EpubMeta{
         this.metadata.language = escape(lang)
     }
     addDescription(description){
-        this.metadata.description = escape(html2txt(description))
+        this.metadata.description = escape(description)
     }
     addIsbn(isbn){
         this.metadata.isbn = escape(isbn)
     }
+    addIssued(issued){
+        this.metadata.issued = escape(issued)
+    }
 
     addMetaData(){
     }

src/sidebar.js

@@ -194,7 +194,7 @@ class SidebarPage{
         $('#book-info').show();
     }
 
-    renderDone(){
+    renderDoneWithBook(){
         $('#loading').hide();
     }
 
@@ -270,6 +270,9 @@ function fillMetadata(epub, book)
         let subject = book.book_info.subjects[i]
         epub.meta.addSubject(subject.name)
     }
+    if (book.book_info.issued){
+        epub.meta.addIssued(book.book_info.issued)
+    }
 
     // # The metadata element or deprecated dc-metadata element contains
     // # at least one identifier element, at least one title element,
@@ -384,7 +387,7 @@ function onDownloadBookClicked(){
             return browser.downloads.download({ "filename" : filename, url : url})
         })
         .then(() =>{
-            page.renderDone();
+            page.renderDoneWithBook();
         })
 
     }, onError);