Dissolve workspace

src/vault/migrate.rs

@@ -0,0 +1,76 @@
+use rusqlite::{Connection, Transaction};
+
+pub fn migrate(conn: &mut Connection) -> rusqlite::Result<()> {
+    let mut tx = conn.transaction()?;
+
+    let user_version: usize =
+        tx.query_row("SELECT * FROM pragma_user_version", [], |r| r.get(0))?;
+
+    let total = MIGRATIONS.len();
+    for (i, migration) in MIGRATIONS.iter().enumerate().skip(user_version) {
+        println!("Migrating vault from {} to {} (out of {})", i, i + 1, total);
+        migration(&mut tx)?;
+    }
+
+    tx.pragma_update(None, "user_version", total)?;
+    tx.commit()
+}
+
+const MIGRATIONS: [fn(&mut Transaction) -> rusqlite::Result<()>; 1] = [m1];
+
+fn m1(tx: &mut Transaction) -> rusqlite::Result<()> {
+    tx.execute_batch(
+        "
+        CREATE TABLE euph_msgs (
+            -- Message
+            room              TEXT NOT NULL,
+            id                INT  NOT NULL,
+            parent            INT,
+            previous_edit_id  INT,
+            time              INT  NOT NULL,
+            content           TEXT NOT NULL,
+            encryption_key_id TEXT,
+            edited            INT,
+            deleted           INT,
+            truncated         INT  NOT NULL,
+
+            -- SessionView
+            user_id             TEXT NOT NULL,
+            name                TEXT
+            server_id           TEXT NOT NULL,
+            server_era          TEXT NOT NULL,
+            session_id          TEXT NOT NULL,
+            is_staff            INT  NOT NULL,
+            is_manager          INT  NOT NULL,
+            client_address      TEXT,
+            real_client_address TEXT,
+
+            PRIMARY KEY (room, id)
+        ) STRICT;
+
+        CREATE TABLE euph_spans (
+            room  TEXT NOT NULL,
+            start INT,
+            end   INT,
+
+            PRIMARY KEY (room, start, end),
+            FOREIGN KEY (room, start) REFERENCES euph_msgs (room, start),
+            FOREIGN KEY (room, end) REFERENCES euph_msgs (room, end)
+        ) STRICT;
+
+        CREATE VIEW euph_trees (room, id) AS
+        SELECT room, id
+        FROM euph_msgs
+        WHERE parent IS NULL
+        UNION
+        (
+            SELECT room, parent
+            FROM euph_msgs
+            WHERE parent IS NOT NULL
+            EXCEPT
+            SELECT room, id
+            FROM euph_msgs
+        )
+        ",
+    )
+}