Sangeetha-Grantha

Metadata	Value
Status	Completed
Version	1.0.2
Last Updated	2026-02-02
Author	Sangita Grantha Team

TRACK-034: Fix TextBlocker Section Parsing

1. Objective

Fix issue where TextBlocker incorrectly parses section headers that contain additional text or punctuation, such as (madhyama kAla sAhityam). This causes the remainder of the header line (e.g. sAhityam)) to be treated as the first line of lyrics.

2. Context

• Issue: The regex for section headers in TextBlocker.kt was too strict and did not account for suffixes like sahityam or enclosing parentheses.
• Impact: Incorrect lyric lines appearing in imported Krithis (e.g. “sAhityam)” as the first line).
• Example: (madhyama kAla sAhityam) was split into Header: MADHYAMAKALA and Content: sAhityam).

3. Implementation Plan

• Analyze TextBlocker.kt and identify the regex flaw.
• Reproduce the issue with a standalone script.
• Update detectSectionHeader regex to support optional suffixes (e.g. sahityam) and handle surrounding punctuation.
• Verify the fix.
• Document implementation summary in application_documentation/.

4. Progress Log

• 2026-02-01: Identified the issue in detectSectionHeader. Created reproduction script. Implemented fix in TextBlocker.kt to handle optional sahityam suffix and clean up trailing punctuation from the remainder. Verified fix with reproduction script.
• 2026-02-01: Extended support for single-letter section headers (P, A, C) as used in some Thyagaraja Vaibhavam posts (e.g. P cakkani...). Validated against multiple URLs.
• 2026-02-01: Hardened production code (TextBlocker and ImportService) to handle literal \n strings discovered during data fix. This ensures robust line splitting even if data is double-escaped in the database or source payload.
• 2026-02-01: Successfully ran FixBalambikayaScript to correct existing data for krithi c64243b2..., converting 10 unstructured variants into correctly segmented sections.
• 2026-02-01: Implemented holistic fix for bulk import pipeline. Added multilingual header support (Tamil, Telugu, Kannada, Malayalam) to TextBlocker.kt. Added section deduplication and stanza-based recovery fallback to ImportService.kt. Validated all 8 krithis in integration test CSV with 100% success rate. Integration test remains available in src/main for review.
• 2026-02-02: Enhanced TextBlocker to preserve language marker blocks and improved deriveSectionsFromBlocks in WebScrapingService to stop duplicate section collection. Added test thyagaraja vaibhavam structure verification.
• 2026-02-02: Remediated backend service tests to use SangitaDalImpl and fixed H2 compatibility issues by aliasing ENUMs to VARCHAR.
• 2026-02-02: Created formal implementation summary in application_documentation/07-quality/track-034-implementation-summary.md. Track completed.