Added banners to repo.

migrations/20220716223422_random_campaign.js

@@ -0,0 +1,58 @@
+exports.up = async (knex) => Promise.resolve()
+	.then(() => knex.schema.createTable('random_campaign', (table) => {
+		table.text('banner_id')
+			.references('id')
+			.inTable('banners');
+
+		table.text('url');
+
+		table.integer('entity_id')
+			.references('id')
+			.inTable('entities');
+
+		table.string('affiliate_id')
+			.references('id')
+			.inTable('affiliates');
+
+		table.integer('parent_id')
+			.references('id')
+			.inTable('entities');
+	}))
+	.then(() => knex.raw(`
+		ALTER TABLE banners ADD COLUMN ratio numeric GENERATED ALWAYS AS (ROUND(width::decimal/ height::decimal, 2)) STORED;
+	`))
+	.then(() => knex.raw(`
+		DROP FUNCTION IF EXISTS get_random_campaign;
+		DROP FUNCTION IF EXISTS banners_ratio;
+
+		CREATE FUNCTION get_random_campaign(min_ratio decimal default 0, max_ratio decimal default 1000.0) RETURNS random_campaign AS $$
+			SELECT * FROM (
+				SELECT DISTINCT ON (CASE WHEN parent_id IS NOT NULL THEN parent_id ELSE entity_id END)
+					banner_id, url, entity_id, affiliate_id, parent_id
+				FROM (
+					SELECT
+						campaigns.*, entities.parent_id as parent_id
+					FROM campaigns
+					LEFT JOIN entities ON entities.id = campaigns.entity_id
+					LEFT JOIN banners ON banners.id = campaigns.banner_id
+					WHERE banner_id IS NOT NULL
+					AND ratio >= min_ratio
+					AND ratio <= max_ratio
+					ORDER BY RANDOM()
+				) random_campaigns
+			) random_banners
+			ORDER BY RANDOM()
+			LIMIT 1;
+		$$ LANGUAGE SQL STABLE;
+	`));
+
+exports.down = async (knex) => knex.raw(`
+	DROP FUNCTION IF EXISTS get_random_campaign;
+	DROP TABLE IF EXISTS random_campaign;
+
+	ALTER TABLE banners DROP COLUMN ratio;
+
+	CREATE FUNCTION banners_ratio(banner banners) RETURNS numeric AS $$
+		SELECT ROUND(banner.width::decimal / banner.height::decimal, 2);
+	$$ LANGUAGE SQL STABLE;
+`);