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diguaandCursor
044d472c4b
Extract canonical generateMessageKey (SHA-256 + base64url) into core. Electron tempDb, merger, and server importer now share the same algorithm, eliminating the server's divergent hex-truncated variant. Co-authored-by: Cursor <cursoragent@cursor.com>
32 lines
1.1 KiB
TypeScript
32 lines
1.1 KiB
TypeScript
/**
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* Canonical message deduplication key generator.
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*
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* Used by both Electron (worker import, merger) and Server (importer)
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* to produce deterministic content-hash keys for messages that lack
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* a platform_message_id.
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*
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* The key is a SHA-256 digest encoded as base64url (full length, ~43 chars).
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* Segments are NUL-separated; content is preceded by a type discriminator
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* so that null content and the literal string "null" hash differently.
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*
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* Empty-string content is normalized to null before hashing to match the
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* storage-layer behavior where '' is folded to NULL in SQLite.
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*/
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import { createHash } from 'crypto'
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export function generateMessageKey(timestamp: number, senderPlatformId: string, content: string | null): string {
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const normalizedContent = content || null
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const hash = createHash('sha256')
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hash.update(String(timestamp))
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hash.update('\0')
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hash.update(senderPlatformId)
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hash.update('\0')
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hash.update(normalizedContent === null ? 'null' : 'text')
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hash.update('\0')
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if (normalizedContent !== null) {
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hash.update(normalizedContent)
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}
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return hash.digest('base64url')
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}
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