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| 1 | +import type { Database } from "bun:sqlite"; |
| 2 | +import { |
| 3 | + cleanUserText, |
| 4 | + extractTexts, |
| 5 | + hasMeaningfulUserText, |
| 6 | +} from "../../hooks/magic-context/read-session-chunk"; |
| 7 | +import type { RawMessage } from "../../hooks/magic-context/read-session-raw"; |
| 8 | +import { removeSystemReminders } from "../../shared/system-directive"; |
| 9 | + |
| 10 | +type PreparedStatement = ReturnType<Database["prepare"]>; |
| 11 | + |
| 12 | +interface MessageHistoryIndexRow { |
| 13 | + last_indexed_ordinal?: number; |
| 14 | +} |
| 15 | + |
| 16 | +const lastIndexedStatements = new WeakMap<Database, PreparedStatement>(); |
| 17 | +const insertMessageStatements = new WeakMap<Database, PreparedStatement>(); |
| 18 | +const upsertIndexStatements = new WeakMap<Database, PreparedStatement>(); |
| 19 | +const deleteFtsStatements = new WeakMap<Database, PreparedStatement>(); |
| 20 | +const deleteIndexStatements = new WeakMap<Database, PreparedStatement>(); |
| 21 | + |
| 22 | +function normalizeIndexText(text: string): string { |
| 23 | + return text.replace(/\s+/g, " ").trim(); |
| 24 | +} |
| 25 | + |
| 26 | +function getLastIndexedStatement(db: Database): PreparedStatement { |
| 27 | + let stmt = lastIndexedStatements.get(db); |
| 28 | + if (!stmt) { |
| 29 | + stmt = db.prepare( |
| 30 | + "SELECT last_indexed_ordinal FROM message_history_index WHERE session_id = ?", |
| 31 | + ); |
| 32 | + lastIndexedStatements.set(db, stmt); |
| 33 | + } |
| 34 | + return stmt; |
| 35 | +} |
| 36 | + |
| 37 | +function getInsertMessageStatement(db: Database): PreparedStatement { |
| 38 | + let stmt = insertMessageStatements.get(db); |
| 39 | + if (!stmt) { |
| 40 | + stmt = db.prepare( |
| 41 | + "INSERT INTO message_history_fts (session_id, message_ordinal, message_id, role, content) VALUES (?, ?, ?, ?, ?)", |
| 42 | + ); |
| 43 | + insertMessageStatements.set(db, stmt); |
| 44 | + } |
| 45 | + return stmt; |
| 46 | +} |
| 47 | + |
| 48 | +function getUpsertIndexStatement(db: Database): PreparedStatement { |
| 49 | + let stmt = upsertIndexStatements.get(db); |
| 50 | + if (!stmt) { |
| 51 | + stmt = db.prepare( |
| 52 | + "INSERT INTO message_history_index (session_id, last_indexed_ordinal, updated_at) VALUES (?, ?, ?) ON CONFLICT(session_id) DO UPDATE SET last_indexed_ordinal = excluded.last_indexed_ordinal, updated_at = excluded.updated_at", |
| 53 | + ); |
| 54 | + upsertIndexStatements.set(db, stmt); |
| 55 | + } |
| 56 | + return stmt; |
| 57 | +} |
| 58 | + |
| 59 | +function getDeleteFtsStatement(db: Database): PreparedStatement { |
| 60 | + let stmt = deleteFtsStatements.get(db); |
| 61 | + if (!stmt) { |
| 62 | + stmt = db.prepare("DELETE FROM message_history_fts WHERE session_id = ?"); |
| 63 | + deleteFtsStatements.set(db, stmt); |
| 64 | + } |
| 65 | + return stmt; |
| 66 | +} |
| 67 | + |
| 68 | +function getDeleteIndexStatement(db: Database): PreparedStatement { |
| 69 | + let stmt = deleteIndexStatements.get(db); |
| 70 | + if (!stmt) { |
| 71 | + stmt = db.prepare("DELETE FROM message_history_index WHERE session_id = ?"); |
| 72 | + deleteIndexStatements.set(db, stmt); |
| 73 | + } |
| 74 | + return stmt; |
| 75 | +} |
| 76 | + |
| 77 | +function getLastIndexedOrdinal(db: Database, sessionId: string): number { |
| 78 | + const row = getLastIndexedStatement(db).get(sessionId) as MessageHistoryIndexRow | null; |
| 79 | + return typeof row?.last_indexed_ordinal === "number" ? row.last_indexed_ordinal : 0; |
| 80 | +} |
| 81 | + |
| 82 | +function clearIndexedMessages(db: Database, sessionId: string): void { |
| 83 | + getDeleteFtsStatement(db).run(sessionId); |
| 84 | + getDeleteIndexStatement(db).run(sessionId); |
| 85 | +} |
| 86 | + |
| 87 | +function getIndexableContent(role: string, parts: unknown[]): string { |
| 88 | + if (role === "user") { |
| 89 | + if (!hasMeaningfulUserText(parts)) { |
| 90 | + return ""; |
| 91 | + } |
| 92 | + |
| 93 | + return extractTexts(parts) |
| 94 | + .map(cleanUserText) |
| 95 | + .map(normalizeIndexText) |
| 96 | + .filter((text) => text.length > 0) |
| 97 | + .join(" / "); |
| 98 | + } |
| 99 | + |
| 100 | + if (role === "assistant") { |
| 101 | + return extractTexts(parts) |
| 102 | + .map(removeSystemReminders) |
| 103 | + .map(normalizeIndexText) |
| 104 | + .filter((text) => text.length > 0) |
| 105 | + .join(" / "); |
| 106 | + } |
| 107 | + |
| 108 | + return ""; |
| 109 | +} |
| 110 | + |
| 111 | +export function ensureMessagesIndexed( |
| 112 | + db: Database, |
| 113 | + sessionId: string, |
| 114 | + readMessages: (sessionId: string) => RawMessage[], |
| 115 | +): void { |
| 116 | + const messages = readMessages(sessionId); |
| 117 | + |
| 118 | + if (messages.length === 0) { |
| 119 | + db.transaction(() => clearIndexedMessages(db, sessionId))(); |
| 120 | + return; |
| 121 | + } |
| 122 | + |
| 123 | + let lastIndexedOrdinal = getLastIndexedOrdinal(db, sessionId); |
| 124 | + if (lastIndexedOrdinal > messages.length) { |
| 125 | + db.transaction(() => clearIndexedMessages(db, sessionId))(); |
| 126 | + lastIndexedOrdinal = 0; |
| 127 | + } |
| 128 | + |
| 129 | + if (lastIndexedOrdinal >= messages.length) { |
| 130 | + return; |
| 131 | + } |
| 132 | + |
| 133 | + const messagesToInsert = messages |
| 134 | + .filter((message) => message.ordinal > lastIndexedOrdinal) |
| 135 | + .filter((message) => message.role === "user" || message.role === "assistant") |
| 136 | + .map((message) => ({ |
| 137 | + ordinal: message.ordinal, |
| 138 | + id: message.id, |
| 139 | + role: message.role, |
| 140 | + content: getIndexableContent(message.role, message.parts), |
| 141 | + })) |
| 142 | + .filter((message) => message.content.length > 0); |
| 143 | + |
| 144 | + const now = Date.now(); |
| 145 | + db.transaction(() => { |
| 146 | + const insertMessage = getInsertMessageStatement(db); |
| 147 | + for (const message of messagesToInsert) { |
| 148 | + insertMessage.run( |
| 149 | + sessionId, |
| 150 | + message.ordinal, |
| 151 | + message.id, |
| 152 | + message.role, |
| 153 | + message.content, |
| 154 | + ); |
| 155 | + } |
| 156 | + |
| 157 | + getUpsertIndexStatement(db).run(sessionId, messages.length, now); |
| 158 | + })(); |
| 159 | +} |
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