share tree should include branch prefixes, fixes #4096

src/share/routes.js

@@ -9,21 +9,28 @@ const contentRenderer = require("./content_renderer");
 const assetPath = require("../services/asset_path");
 const appPath = require("../services/app_path");
 
+/**
+ * @param {SNote} note
+ * @return {{note: SNote, branch: SBranch}|{}}
+ */
 function getSharedSubTreeRoot(note) {
     if (note.noteId === shareRoot.SHARE_ROOT_NOTE_ID) {
         // share root itself is not shared
-        return null;
+        return {};
     }
 
     // every path leads to share root, but which one to choose?
     // for the sake of simplicity, URLs are not note paths
-    const parentNote = note.getParentNotes()[0];
+    const parentBranch = note.getParentBranches()[0];
 
-    if (parentNote.noteId === shareRoot.SHARE_ROOT_NOTE_ID) {
-        return note;
+    if (parentBranch.parentNoteId === shareRoot.SHARE_ROOT_NOTE_ID) {
+        return {
+            note,
+            branch: parentBranch
+        };
     }
 
-    return getSharedSubTreeRoot(parentNote);
+    return getSharedSubTreeRoot(parentBranch.getParentNote());
 }
 
 function addNoIndexHeader(note, res) {

src/share/shaca/entities/sbranch.js

@@ -52,6 +52,11 @@ class SBranch extends AbstractShacaEntity {
     get parentNote() {
         return this.shaca.notes[this.parentNoteId];
     }
+
+    /** @returns {SNote} */
+    getParentNote() {
+        return this.parentNote;
+    }
 }
 
 module.exports = SBranch;

src/share/shaca/entities/snote.js

@@ -68,6 +68,13 @@ class SNote extends AbstractShacaEntity {
         return this.children.map(childNote => this.shaca.getBranchFromChildAndParent(childNote.noteId, this.noteId));
     }
 
+    /** @returns {SBranch[]} */
+    getVisibleChildBranches() {
+        return this.getChildBranches()
+            .filter(branch => !branch.isHidden
+                && !branch.getNote().isLabelTruthy('shareHiddenFromTree'));
+    }
+
     /** @returns {SNote[]} */
     getParentNotes() {
         return this.parents;
@@ -80,10 +87,8 @@ class SNote extends AbstractShacaEntity {
 
     /** @returns {SNote[]} */
     getVisibleChildNotes() {
-        return this.getChildBranches()
-            .filter(branch => !branch.isHidden)
-            .map(branch => branch.getNote())
-            .filter(childNote => !childNote.isLabelTruthy('shareHiddenFromTree'));
+        return this.getVisibleChildBranches()
+            .map(branch => branch.getNote());
     }
 
     /** @returns {boolean} */