added "move note" search action

src/services/branches.js

@@ -0,0 +1,46 @@
+const treeService = require("./tree.js");
+const sql = require("./sql.js");
+
+function moveBranchToNote(sourceBranch, targetParentNoteId) {
+    if (sourceBranch.parentNoteId === targetParentNoteId) {
+        return {success: true}; // no-op
+    }
+
+    const validationResult = treeService.validateParentChild(targetParentNoteId, sourceBranch.noteId, sourceBranch.branchId);
+
+    if (!validationResult.success) {
+        return [200, validationResult];
+    }
+
+    const maxNotePos = sql.getValue('SELECT MAX(notePosition) FROM branches WHERE parentNoteId = ? AND isDeleted = 0', [targetParentNoteId]);
+    const newNotePos = maxNotePos === null ? 0 : maxNotePos + 10;
+
+    const newBranch = sourceBranch.createClone(targetParentNoteId, newNotePos);
+    newBranch.save();
+
+    sourceBranch.markAsDeleted();
+
+    return {
+        success: true,
+        branch: newBranch
+    };
+}
+
+function moveBranchToBranch(sourceBranch, targetParentBranch) {
+    const res = moveBranchToNote(sourceBranch, targetParentBranch.noteId);
+
+    if (!res.success) {
+        return res;
+    }
+
+    // expanding so that the new placement of the branch is immediately visible
+    targetParentBranch.isExpanded = true;
+    targetParentBranch.save();
+
+    return res;
+}
+
+module.exports = {
+    moveBranchToBranch,
+    moveBranchToNote
+};