rework polls and fact checking

migrations/2024-09-16-artefacts.ts

@@ -0,0 +1,112 @@
+import { type Kysely, sql } from 'kysely'
+
+export async function up(db: Kysely<any>): Promise<void> {
+	await db.transaction().execute(async trx => {
+		/*
+		 * Create `Artifact` and `Quote` tables
+		 */
+
+		await sql`
+			create table Artefact (
+				  id          integer not null    primary key autoincrement
+				, url         text    not null    unique
+				, description text                default null
+				, createdAt   integer not null    default (unixepoch('subsec')*1000)
+			)
+		`.execute(trx)
+
+		// -- The `Quote` table is for the verbatim quote pasted into Jabble.
+
+		await sql`
+			create table Quote (
+				  id          integer not null primary key autoincrement
+				, artefactId  integer not null references Artefact(id)
+				, quote       text    not null
+				, createdAt   integer not null default (unixepoch('subsec')*1000)
+			)
+		`.execute(trx)
+
+		/*
+		 * Preserve `ClaimToArtifact` relation
+		 */
+
+		await sql`
+			insert into Artefact (
+				  url
+				, createdAt
+			)
+			select
+				  origin
+				, min(createdAt) as createdAt
+			from ClaimContext
+			where origin is not null
+			and origin <> ''
+			group by origin
+		`.execute(trx)
+
+		await sql`
+			create table ClaimToArtefact (
+				  claimId    integer not null references Claim(Id)
+				, artefactId integer not null references Artefact(id)
+				, primary key (claimId, artefactId)
+			)
+		`.execute(trx)
+
+		await sql`
+			insert into ClaimToArtefact (
+				  claimId
+				, artefactId
+			)
+			select
+				a.id as artefactId
+				, c2cc.claimid as claimId
+			from claimcontext cc
+			join artefact a
+			on a.url = cc.origin
+			join claimtoclaimcontext c2cc
+			on cc.id = c2cc.contextId
+			where origin <> ''
+			and origin is not null
+		`.execute(trx)
+
+		/*
+		 * Remove contextId from `Poll`
+		 */
+
+		// -- We need to recreate the table because contextId is in the primary key
+		// -- of the `Poll` table.
+
+		await sql`
+			alter table Poll
+			rename to PollDeprecated__TMP
+		`.execute(trx)
+
+		await sql`
+			create table Poll (
+				  claimId  integer not null references Claim(Id)
+				, postId   integer not null references Post(id)
+				, pollType text    not null
+				, primary key (claimId)
+			)
+		`.execute(trx)
+
+		await sql`
+			insert into Poll (
+				  claimId
+				, postId
+				, pollType
+			)
+			select
+				  claimId
+				, postId
+				, pollType
+			from PollDeprecated__TMP
+		`.execute(trx)
+
+		await sql`
+			drop table PollDeprecated__TMP
+		`.execute(trx)
+
+	})
+}
+