Some migration fixes and database optimizations

core/data/messages.go

@@ -0,0 +1,32 @@
+package data
+
+import (
+	"database/sql"
+
+	log "github.com/sirupsen/logrus"
+)
+
+func CreateMessagesTable(db *sql.DB) {
+	createTableSQL := `CREATE TABLE IF NOT EXISTS messages (
+		"id" string NOT NULL,
+		"user_id" INTEGER,
+		"body" TEXT,
+		"eventType" TEXT,
+		"hidden_at" DATETIME,
+		"timestamp" DATETIME,
+		PRIMARY KEY (id)
+	);CREATE INDEX index ON messages (id, user_id, hidden_at, timestamp);
+	CREATE INDEX id ON messages (id);
+	CREATE INDEX user_id ON messages (user_id);
+	CREATE INDEX hidden_at ON messages (hidden_at);
+	CREATE INDEX timestamp ON messages (timestamp);`
+
+	stmt, err := db.Prepare(createTableSQL)
+	if err != nil {
+		log.Fatal("error creating chat messages table", err)
+	}
+	defer stmt.Close()
+	if _, err := stmt.Exec(); err != nil {
+		log.Fatal("error creating chat messages table", err)
+	}
+}