Disable publish on empty documents

frontend/models/Document.js

@@ -14,6 +14,8 @@ const parseHeader = text => {
   return firstLine.replace(/^#/, '').trim();
 };
 
+const DEFAULT_TITLE = 'Untitled document';
+
 class Document {
   isSaving: boolean = false;
   hasPendingChanges: boolean = false;
@@ -32,7 +34,7 @@ class Document {
   private: boolean = false;
   starred: boolean = false;
   text: string = '';
-  title: string = 'Untitled document';
+  title: string = '';
   parentDocument: ?Document;
   updatedAt: string;
   updatedBy: User;
@@ -70,6 +72,14 @@ class Document {
     return [];
   }
 
+  @computed get allowSave(): boolean {
+    // Check if the document title has been modified and user generated content exists
+    return (
+      this.text.replace(new RegExp(`^\#$`), '').trim().length > 0 &&
+      !this.isSaving
+    );
+  }
+
   /* Actions */
 
   @action star = async () => {
@@ -135,6 +145,14 @@ class Document {
           text: this.text,
         });
       } else {
+        if (!this.title) {
+          this.title = DEFAULT_TITLE;
+          this.text = this.text.replace(
+            new RegExp(`^\# `),
+            `# ${DEFAULT_TITLE}`
+          );
+        }
+
         const data = {
           parentDocument: undefined,
           collection: this.collection.id,

frontend/scenes/Document/Document.js

@@ -70,6 +70,8 @@ type Props = {
     if (props.newDocument) {
       const newDocument = new Document({
         collection: { id: props.match.params.id },
+        title: '',
+        text: '',
       });
       this.setState({ newDocument });
     } else {
@@ -102,6 +104,7 @@ type Props = {
   };
 
   onSave = async (redirect: boolean = false) => {
+    if (!get(this.document, 'allowSave')) return;
     let document = this.document;
 
     if (!document) return;
@@ -218,7 +221,7 @@ type Props = {
                       ? <SaveAction
                           showCheckmark={this.state.showAsSaved}
                           onClick={this.onSave.bind(this, true)}
-                          disabled={get(this.document, 'isSaving')}
+                          disabled={!get(this.document, 'allowSave')}
                           isNew={!!isNew}
                         />
                       : <a onClick={this.onClickEdit}>Edit</a>}