logger-messages

Logger Message Guidelines

Write clear, user-friendly messages for Simple History event logs.

Core Principle: Active Voice

Write as if someone is telling you what they just did.

✅ DO                          ❌ DON'T
─────────────────────────────────────────────
Activated plugin              Plugin was activated
Created menu                  Menu has been created
Updated settings              Settings were updated
Published post                Post has been published

In Logger Classes

public function getInfo() {
    return [
        'messages' => [
            'plugin_activated' => __( 'Activated plugin', 'simple-history' ),
            'plugin_deactivated' => __( 'Deactivated plugin', 'simple-history' ),
            'post_updated' => __( 'Updated post "{post_title}"', 'simple-history' ),
        ],
    ];
}

Message Key Uniqueness

Keys must be globally unique across all loggers (used as RFC 5424 MSGID).

// ✅ Good - descriptive prefix
'plugin_activated', 'theme_switched', 'user_logged_in'

// ❌ Bad - too generic
'activated', 'updated', 'deleted'

Verify uniqueness: grep -r "'your_key'" loggers/

Common Verbs

• Create: Created, Added, Generated
• Modify: Updated, Changed, Edited
• Delete: Deleted, Removed, Trashed
• Toggle: Activated, Deactivated, Enabled, Disabled

Avoid

• ❌ "was [verb]" - passive
• ❌ "has been [verb]" - passive
• ❌ Technical jargon users won't understand

No Links Inside Message Text

The message body is a declarative sentence ("what happened?"). Action links (rendered below the message, see the action-links skill) are the canonical "what can I do?" affordance. Wrapping {post_title} (or any other interpolated token) in an <a> tag inside the template puts a CTA mid-sentence and competes with the action row.

Rule: Inline links inside message templates are permitted only when they point somewhere the action row cannot reach. If get_action_links() already covers the destination (Edit, View, Revisions, the overview page, …), the message must be plain text.

// ❌ Don't — Edit/View action links already point to the post.
'post_updated' => __( 'Updated post "<a href="...">{post_title}</a>"', 'simple-history' ),

// ✅ Do — plain title, action row handles navigation.
'post_updated' => __( 'Updated post "{post_title}"', 'simple-history' ),

Deleted items: still plain text. A dead link is worse than no link — the overview action link (All pages, All plugins) is the right hand-off.

Legitimate exception: the link goes somewhere no action link can express (e.g. an arbitrary external reference). Then an inline link is additive, not redundant.

Not an urgent migration — apply opportunistically when touching a logger for other reasons.

Context Key Naming

Prefix all context keys with the entity name to avoid collisions and keep keys self-documenting.

// ✅ Good - prefixed with entity
'plugin_name', 'plugin_current_version', 'theme_new_version'
'site_health_status', 'site_health_label', 'site_health_badge_label'

// ❌ Bad - too generic
'test', 'label', 'status', 'name', 'version'

Event Details Output

Use the Event Details API for get_log_row_details_output(). Never build raw HTML with SimpleHistoryLogitem__keyValueTable.

use Simple_History\Event_Details\Event_Details_Group;
use Simple_History\Event_Details\Event_Details_Group_Table_Formatter;
use Simple_History\Event_Details\Event_Details_Item;

public function get_log_row_details_output( $row ) {
    $group = new Event_Details_Group();
    $group->set_formatter( new Event_Details_Group_Table_Formatter() );
    $group->add_items(
        array(
            // Read value directly from context key.
            new Event_Details_Item( 'status', __( 'Status', 'simple-history' ) ),
            // Read new/prev pair from context (looks for key_new and key_prev).
            new Event_Details_Item( array( 'setting_name' ), __( 'Setting', 'simple-history' ) ),
        )
    );
    return $group;
}

Formatters:

• Event_Details_Group_Table_Formatter — key-value table (default)
• Event_Details_Group_Diff_Table_Formatter — before/after with diffs
• Event_Details_Group_Inline_Formatter — compact inline text

Manual values (when context keys don't match conventions):

( new Event_Details_Item( null, __( 'Label', 'simple-history' ) ) )
    ->set_new_value( $value )

See docs/architecture/event-details.md for full API reference.

RAW Formatters (Escape Hatch)

When the structured API can't express your output (images, HTML content, color swatches):

• Item_RAW_Formatter — Full custom HTML/JSON for an item (no name column)
• Item_Table_Row_RAW_Formatter — Table row with escaped name + raw HTML value

use Simple_History\Event_Details\Event_Details_Item_Table_Row_RAW_Formatter;

$raw_formatter = ( new Event_Details_Item_Table_Row_RAW_Formatter() )
    ->set_html_output( sprintf( '<a href="%1$s">%2$s</a>', esc_url( $url ), esc_html( $url ) ) )
    ->set_json_output( [ 'url' => $url ] );

$item = ( new Event_Details_Item( null, __( 'URL', 'simple-history' ) ) )
    ->set_formatter( $raw_formatter );

Use RAW formatters sparingly — only when no structured formatter fits.

Links Below Events: Use Action Links, Not Details

Navigational links (Edit, View, Preview) belong in get_action_links(), not inside get_log_row_details_output(). See the action-links skill.

Old loggers often embed <a> tags in the details table (e.g., "View/Edit" comment link, "View plugin info" thickbox). When migrating these loggers:

1. Move navigational links to get_action_links()
2. Keep only informational data in Event Details

The only case for a link inside details is when the value itself is a URL (e.g., a plugin's homepage URL displayed as data). Use Item_Table_Row_RAW_Formatter for that.

Migrating from Old HTML to Event Details

Many older loggers build HTML manually with SimpleHistoryLogitem__keyValueTable tables. When migrating:

Old pattern	New approach
<table class='SimpleHistoryLogitem__keyValueTable'> with <tr>/<td>	Event_Details_Group + Group_Table_Formatter
<ins> / <del> for changed values	Event_Details_Item with set_values() (auto-generates ins/del)
<span class='SimpleHistoryLogitem__inlineDivided'>	Event_Details_Group + Group_Inline_Formatter
Inline <a href> links to edit/view	Move to get_action_links()
Images, color swatches, shortcode output	Item_RAW_Formatter or Item_Table_Row_RAW_Formatter
Standalone <p> text blocks (not key-value)	Group_Inline_Formatter with a single item, or RAW formatter

Value transforms (e.g., true → "Enabled", locale → display name): Transform in PHP, then pass to set_new_value() / set_prev_value().

Conditional rows: Don't set values for items you want hidden — the container auto-removes empty items.

Detailed Resources

• examples.md - Extensive examples across all WordPress contexts
• integration.md - Complete logger class implementation