Added database table creation and tests

src/packages/emmett-sqlite/src/eventStore/schema/createEventStoreSchema.int.spec.ts

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+import assert from 'assert';
+import { after, before, describe, it } from 'node:test';
+import sqlite3 from 'sqlite3';
+import { dbConn, type SQLiteConnection } from '../../sqliteConnection';
+import { createEventStoreSchema } from '../schema';
+
+type TableExists = {
+  name: string;
+};
+
+const tableExists = async (
+  db: SQLiteConnection,
+  tableName: string,
+): Promise<boolean> => {
+  const result = await db.querySingle<TableExists>(
+    `SELECT name FROM sqlite_master WHERE type='table' AND name='${tableName}';`,
+  );
+
+  return result?.name ? true : false;
+};
+
+void describe('createEventStoreSchema', () => {
+  let conn: sqlite3.Database;
+  let db: SQLiteConnection;
+
+  before(async () => {
+    conn = new sqlite3.Database(':memory:');
+
+    db = dbConn(conn);
+
+    await createEventStoreSchema(db);
+  });
+
+  after(() => {
+    conn.close();
+  });
+
+  void describe('creates tables', () => {
+    void it('creates the streams table', async () => {
+      assert.ok(await tableExists(db, 'emt_streams'));
+    });
+
+    void it('creates the events table', async () => {
+      assert.ok(await tableExists(db, 'emt_events'));
+    });
+  });
+});

src/packages/emmett-sqlite/src/eventStore/schema/index.ts

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+import { type SQLiteConnection } from '../../sqliteConnection';
+import { eventsTableSQL, streamsTableSQL } from './tables';
+
+export * from './tables';
+
+export const schemaSQL: string[] = [streamsTableSQL, eventsTableSQL];
+
+export const createEventStoreSchema = async (
+  db: SQLiteConnection,
+): Promise<void> => {
+  for (const sql of schemaSQL) {
+    try {
+      await db.command(sql);
+    } catch (error) {
+      console.log(error);
+    }
+  }
+};

src/packages/emmett-sqlite/src/eventStore/schema/tables.ts

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+import { eventsTable, globalTag, streamsTable } from './typing';
+
+export const sql = (sql: string) => sql;
+
+export const streamsTableSQL = sql(
+  `CREATE TABLE IF NOT EXISTS ${streamsTable.name}(
+      stream_id         TEXT                      NOT NULL,
+      stream_position   BIGINT                    NOT NULL DEFAULT 0,
+      partition         TEXT                      NOT NULL DEFAULT '${globalTag}__${globalTag}',
+      stream_type       TEXT                      NOT NULL,
+      stream_metadata   JSONB                     NOT NULL,
+      is_archived       BOOLEAN                   NOT NULL DEFAULT FALSE,
+      PRIMARY KEY (stream_id, stream_position, partition, is_archived),
+      UNIQUE (stream_id, partition, is_archived)
+  );`,
+);
+
+export const eventsTableSQL = sql(
+  `CREATE TABLE IF NOT EXISTS ${eventsTable.name}(
+      stream_id              TEXT                      NOT NULL,
+      stream_position        BIGINT                    NOT NULL,
+      partition              TEXT                      NOT NULL DEFAULT '${globalTag}',
+      event_data             JSONB                     NOT NULL,
+      event_metadata         JSONB                     NOT NULL,
+      event_schema_version   TEXT                      NOT NULL,
+      event_type             TEXT                      NOT NULL,
+      event_id               TEXT                      NOT NULL,
+      is_archived            BOOLEAN                   NOT NULL DEFAULT FALSE,
+      global_position        BIGINT                    ,
+      created                DATETIME                  DEFAULT CURRENT_TIMESTAMP,
+      PRIMARY KEY (stream_id, stream_position, partition, is_archived)
+  ); 
+`,
+);

src/packages/emmett-sqlite/src/eventStore/schema/typing.ts

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+export const emmettPrefix = 'emt';
+
+export const globalTag = 'global';
+export const defaultTag = 'emt:default';
+
+export const globalNames = {
+  module: `${emmettPrefix}:module:${globalTag}`,
+};
+
+const columns = {
+  partition: {
+    name: 'partition',
+  },
+  isArchived: { name: 'is_archived' },
+};
+
+export const streamsTable = {
+  name: `${emmettPrefix}_streams`,
+  columns: {
+    partition: columns.partition,
+    isArchived: columns.isArchived,
+  },
+};
+
+export const eventsTable = {
+  name: `${emmettPrefix}_events`,
+  columns: {
+    partition: columns.partition,
+    isArchived: columns.isArchived,
+  },
+};

src/packages/emmett-sqlite/src/sqliteConnection.ts

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+import type sqlite3 from 'sqlite3';
+
+type Parameters = object | string | number | null;
+
+export type SQLiteConnection = {
+  command: (sql: string, values?: Parameters[]) => Promise<void>;
+  query: <T>(sql: string, values?: Parameters[]) => Promise<T[]>;
+  querySingle: <T>(sql: string, values?: Parameters[]) => Promise<T | null>;
+};
+
+export const dbConn = (conn: sqlite3.Database): SQLiteConnection => {
+  const db = conn;
+
+  return {
+    command: (sql: string, params?: Parameters[]) =>
+      new Promise((resolve, reject) => {
+        db.run(sql, params ?? [], (err: Error | null) => {
+          if (err) {
+            reject(err);
+            return;
+          }
+
+          resolve();
+        });
+      }),
+    query: <T>(sql: string, params?: Parameters[]): Promise<T[]> =>
+      new Promise((resolve, reject) => {
+        db.all(sql, params ?? [], (err: Error | null, result: T[]) => {
+          if (err) {
+            reject(err);
+            return;
+          }
+
+          resolve(result);
+        });
+      }),
+    querySingle: <T>(sql: string, params?: Parameters[]): Promise<T | null> =>
+      new Promise((resolve, reject) => {
+        db.get(sql, params ?? [], (err: Error | null, result: T | null) => {
+          if (err) {
+            reject(err);
+            return;
+          }
+
+          resolve(result);
+        });
+      }),
+  };
+};