contentdiff

Overview ¶

Package contentdiff provides HTML comparison and difference detection functionality.

This package compares HTML documents to identify changes between different versions of a bookmarked web page. It extracts and compares:

• Text content (rendered text from the page)
• Links (href and anchor text)
• Multimedia elements (images, videos)

The comparison uses the Myers diff algorithm (via sergi/go-diff) to compute differences in text content. For links and multimedia, it performs set-based comparison to identify additions and removals.

The package is used to show users what has changed on a bookmarked page between snapshots, making it easy to track content updates, new links, or removed sections.

Example usage:

reader1 := strings.NewReader(oldHTML)
reader2 := strings.NewReader(newHTML)
diffs, err := contentdiff.DiffHTML(reader1, reader2)
if err != nil {
    return err
}

// Display text changes
for _, d := range diffs.Text {
    fmt.Printf("[%s] %s\n", d.Type, d.Text)
}