#8187 It is possible to create preset with empty name

[Copilot]

How the feature works? / How did you fix the issue?

Creating RNA presets with empty names could slip into the library via monomer group template updates, violating the preset naming requirement and yielding unnamed presets in the UI.

• Validation (monomer group templates): Reject monomer group templates with empty/whitespace-only names during updateMonomersLibrary and log a targeted error so the preset is not added.
• Coverage: Added a unit test for whitespace-only names to lock in the validation behavior.

Example:

if (!templateDefinition.name?.trim()) {
  KetcherLogger.error(
    `Editor::updateMonomersLibrary: Monomer group template name cannot be empty or whitespace for template ${templateRef.$ref}. The template was not added to the library.`,
  );
  return;
}

(Screenshots, videos, or GIFs, if applicable)

Check list

• unit-tests written
• e2e-tests written
• documentation updated
• PR name follows the pattern #1234 – issue name
• branch name doesn't contain '#'
• PR is linked with the issue
• base branch (master or release/xx) is correct
• task status changed to "Code review"
• reviewers are notified about the pull request

Original prompt

---

This section details on the original issue you should resolve

<issue_title>It is possible to create preset with empty name</issue_title>
<issue_description>Steps to Reproduce

1. Open Macromolecules - Flex mode (clean canvas)
2. Go to console and execute following commands:

Preset with empty name

await ketcher.updateMonomersLibrary('\n  -INDIGO-10092514292D\n\n  0  0  0  0  0  0  0  0  0  0  0 V3000\nM  V30 BEGIN CTAB\nM  V30 COUNTS 3 2 0 0 0\nM  V30 BEGIN ATOM\nM  V30 1 Base1 7.7 -8.025 0.0 0 CLASS=BASE SEQID=1 ATTCHORD=(2 3 Al)\nM  V30 2 Phosphate1 9.2 -6.525 0.0 0 CLASS=PHOSPHATE SEQID=1 ATTCHORD=(2 3 Al-\nM  V30 )\nM  V30 3 Sugar1 7.7 -6.525 0.0 0 CLASS=SUGAR SEQID=1 ATTCHORD=(4 1 Cx 2 Br)\nM  V30 END ATOM\nM  V30 BEGIN BOND\nM  V30 1 1 3 1\nM  V30 2 1 3 2\nM  V30 END BOND\nM  V30 END CTAB\nM  V30 BEGIN TEMPLATE\nM  V30 TEMPLATE 1 BASE/Base1/Base1 NATREPLACE=BASE/U\nM  V30 BEGIN CTAB\nM  V30 COUNTS 13 12 5 0 0\nM  V30 BEGIN ATOM\nM  V30 1 H -4.33 0.75 0.0 0\nM  V30 2 C -3.464 0.25 0.0 0\nM  V30 3 C -2.598 0.75 0.0 0\nM  V30 4 C -1.732 0.25 0.0 0\nM  V30 5 C -0.866 0.75 0.0 0\nM  V30 6 C 0.0 0.25 0.0 0\nM  V30 7 C 0.866 0.75 0.0 0\nM  V30 8 C 1.732 0.25 0.0 0\nM  V30 9 C 2.598 0.75 0.0 0\nM  V30 10 C 3.464 0.25 0.0 0\nM  V30 11 H 4.33 0.75 0.0 0\nM  V30 12 H -3.464 -0.75 0.0 0\nM  V30 13 H -1.732 -0.75 0.0 0\nM  V30 END ATOM\nM  V30 BEGIN BOND\nM  V30 1 1 1 2\nM  V30 2 1 2 3\nM  V30 3 1 3 4\nM  V30 4 1 4 5\nM  V30 5 1 5 6\nM  V30 6 1 6 7\nM  V30 7 1 7 8\nM  V30 8 1 8 9\nM  V30 9 1 9 10\nM  V30 10 1 10 11\nM  V30 11 1 2 12\nM  V30 12 1 4 13\nM  V30 END BOND\nM  V30 BEGIN SGROUP\nM  V30 1 SUP 1 ATOMS=(1 1) XBONDS=(1 1) BRKXYZ=(9 0.433000 -0.250000 0.000000-\nM  V30  0.000000 0.000000 0.000000 0.000000 0.000000 0.000000) LABEL=H CLASS=-\nM  V30 LGRP\nM  V30 2 SUP 2 ATOMS=(1 11) XBONDS=(1 10) BRKXYZ=(9 -0.433000 -0.250000 0.000-\nM  V30 000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000) LABEL=H CLA-\nM  V30 SS=LGRP\nM  V30 3 SUP 3 ATOMS=(1 12) XBONDS=(1 11) BRKXYZ=(9 0.000000 0.500000 0.00000-\nM  V30 0 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000) LABEL=H CLASS-\nM  V30 =LGRP\nM  V30 4 SUP 4 ATOMS=(1 13) XBONDS=(1 12) BRKXYZ=(9 0.000000 0.500000 0.00000-\nM  V30 0 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000) LABEL=H CLASS-\nM  V30 =LGRP\nM  V30 5 SUP 5 ATOMS=(9 2 3 4 5 6 7 8 9 10) XBONDS=(4 1 11 12 10) BRKXYZ=(9 --\nM  V30 0.433000 0.250000 0.000000 0.000000 -0.500000 0.000000 0.000000 0.0000-\nM  V30 00 0.000000) BRKXYZ=(9 0.000000 -0.500000 0.000000 0.433000 0.250000 0-\nM  V30 .000000 0.000000 0.000000 0.000000) LABEL=Base1 CLASS=BASE SAP=(3 2 1 -\nM  V30 Al) SAP=(3 10 11 Br) SAP=(3 2 12 Cx) SAP=(3 4 13 Dx) NATREPLACE=BASE/U\nM  V30 END SGROUP\nM  V30 END CTAB\nM  V30 TEMPLATE 2 PHOSPHATE/Phosphate1/Phosphate1 NATREPLACE=PHOSPHATE/P\nM  V30 BEGIN CTAB\nM  V30 COUNTS 16 15 6 0 0\nM  V30 BEGIN ATOM\nM  V30 1 H -5.196 0.75 0.0 0\nM  V30 2 C -4.33 0.25 0.0 0\nM  V30 3 C -3.464 0.75 0.0 0\nM  V30 4 C -2.598 0.25 0.0 0\nM  V30 5 C -1.732 0.75 0.0 0\nM  V30 6 C -0.866 0.25 0.0 0\nM  V30 7 C 0.0 0.75 0.0 0\nM  V30 8 C 0.866 0.25 0.0 0\nM  V30 9 C 1.732 0.75 0.0 0\nM  V30 10 C 2.598 0.25 0.0 0\nM  V30 11 C 3.464 0.75 0.0 0\nM  V30 12 C 4.33 0.25 0.0 0\nM  V30 13 H 5.196 0.75 0.0 0\nM  V30 14 H -4.33 -0.75 0.0 0\nM  V30 15 H -2.598 -0.75 0.0 0\nM  V30 16 H -0.866 -0.75 0.0 0\nM  V30 END ATOM\nM  V30 BEGIN BOND\nM  V30 1 1 1 2\nM  V30 2 1 2 3\nM  V30 3 1 3 4\nM  V30 4 1 4 5\nM  V30 5 1 5 6\nM  V30 6 1 6 7\nM  V30 7 1 7 8\nM  V30 8 1 8 9\nM  V30 9 1 9 10\nM  V30 10 1 10 11\nM  V30 11 1 11 12\nM  V30 12 1 12 13\nM  V30 13 1 2 14\nM  V30 14 1 4 15\nM  V30 15 1 6 16\nM  V30 END BOND\nM  V30 BEGIN SGROUP\nM  V30 1 SUP 1 ATOMS=(1 1) XBONDS=(1 1) BRKXYZ=(9 0.433000 -0.250000 0.000000-\nM  V30  0.000000 0.000000 0.000000 0.000000 0.000000 0.000000) LABEL=H CLASS=-\nM  V30 LGRP\nM  V30 2 SUP 2 ATOMS=(1 13) XBONDS=(1 12) BRKXYZ=(9 -0.433000 -0.250000 0.000-\nM  V30 000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000) LABEL=H CLA-\nM  V30 SS=LGRP\nM  V30 3 SUP 3 ATOMS=(1 14) XBONDS=(1 13) BRKXYZ=(9 0.000000 0.500000 0.00000-\nM  V30 0 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000) LABEL=H CLASS-\nM  V30 =LGRP\nM  V30 4 SUP 4 ATOMS=(1 15) XBONDS=(1 14) BRKXYZ=(9 0.000000 0.500000 0.00000-\nM  V30 0 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000) LABEL=H CLASS-\nM  V30 =LGRP\nM  V30 5 SUP 5 ATOMS=(1 16) XBONDS=(1 15) BRKXYZ=(9 0.000000 0.500000 0.00000-\nM  V30 0 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000) LABEL=H CLASS-\nM  V30 =LGRP\nM  V30 6 SUP 6 ATOMS=(11 2 3 4 5 6 7 8 9 10 11 12) XBONDS=(5 1 13 14 15 12) B-\nM  V30 RKXYZ=(9 -0.433000 0.250000 0.000000 0.000000 -0.500000 0.000000 0.000-\nM  V30 000 0.000000 0.000000) BRKXYZ=(9 0.000000 -0.500000 0.000000 0.000000 -\nM  V30 -0.500000 0.000000 0.000000 0.000000 0.000000) BRKXYZ=(9 0.433000 0.25-\nM  V30 0000 0.000000 0.000000 0.000000 0.000000 0.000000 0...

</details>



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- Fixes epam/ketcher#8187

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