FDSF4-18: Fallback to the label if no title has been set.

[jordandukart]

Summary by CodeRabbit

• Bug Fixes
  • Ensures OAI metadata always includes a main title by falling back to the item’s label when no title is present.
  • Prevents empty or missing dcterms:title values, improving consistency for harvesters and downstream displays.

[coderabbitai]

Walkthrough

Adds a fallback to ensure a main title is present in OAI metadata by invoking a new addFallbackTitle method after field processing. The method assigns the entity label to TITLE_ELEMENT_MAIN if no title was previously set.

Changes

Cohort / File(s)	Summary
OAI metadata fallback title src/Plugin/OaiMetadataMap/DgiStandard.php	Added protected method addFallbackTitle(ContentEntityInterface $entity): void; invoked after addFields to set TITLE_ELEMENT_MAIN to the entity label when absent; includes guard to avoid overwriting existing titles and a docblock.

Sequence Diagram(s)

sequenceDiagram
    autonumber
    actor Caller as Caller
    participant Plugin as DgiStandard
    participant Entity as ContentEntity

    Caller->>Plugin: render OAI metadata(Entity)
    activate Plugin
    Plugin->>Plugin: addFields(Entity)
    note right of Plugin: Populate elements from mapped fields
    Plugin->>Plugin: addFallbackTitle(Entity)
    alt TITLE_ELEMENT_MAIN not set
        Plugin->>Plugin: elements[TITLE_ELEMENT_MAIN] = Entity.label()
        note right of Plugin: Ensures dcterms:title is present
    else Already set
        note right of Plugin: No change
    end
    Plugin-->>Caller: Rendered metadata
    deactivate Plugin

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Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Poem

I nibbled through fields with careful delight,
Found no title shining, no name in sight—
So I hopped in a label, snug and bright,
Now dcterms:title glows in the night.
Thump-thump! The metadata’s right.

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Errors (1)

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✨ Finishing Touches

• 📝 Generate Docstrings

🧪 Generate unit tests

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch fix/fallback-title

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[coderabbitai]

Actionable comments posted: 1

📜 Review details

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📥 Commits

Reviewing files that changed from the base of the PR and between 6a1ab35 and 32dd0a4.

📒 Files selected for processing (1)

• src/Plugin/OaiMetadataMap/DgiStandard.php (2 hunks)

🔇 Additional comments (1)

src/Plugin/OaiMetadataMap/DgiStandard.php (1)

425-426: Good placement for fallback invocation.

Calling the fallback after all field/paragraph handling ensures we only inject a label when no main title was produced upstream.