various fixes: refactored imports, introduced fromDriver/toDriver to improve compat

app/src/data/connection/Connection.ts

@@ -20,6 +20,7 @@ import {
 import type { BaseIntrospector, BaseIntrospectorConfig } from "./BaseIntrospector";
 import type { Constructor, DB } from "core";
 import { KyselyPluginRunner } from "data/plugins/KyselyPluginRunner";
+import type { Field } from "data/fields/Field";
 
 export type QB = SelectQueryBuilder<any, any, any>;
 
@@ -200,6 +201,14 @@ export abstract class Connection<Client = unknown> {
 
    abstract getFieldSchema(spec: FieldSpec, strict?: boolean): SchemaResponse;
 
+   toDriver(value: unknown, field: Field): unknown {
+      return value;
+   }
+
+   fromDriver(value: any, field: Field): unknown {
+      return value;
+   }
+
    async close(): Promise<void> {
       // no-op by default
    }

app/src/data/connection/connection-test-suite.ts

@@ -1,6 +1,8 @@
 import type { TestRunner } from "core/test";
 import { Connection, type FieldSpec } from "./Connection";
 
+// @todo: add various datatypes: string, number, boolean, object, array, null, undefined, date, etc.
+
 export function connectionTestSuite(
    testRunner: TestRunner,
    {

app/src/data/connection/sqlite/LibsqlConnection.ts

@@ -57,6 +57,6 @@ export class LibsqlConnection extends SqliteConnection<Client> {
    }
 }
 
-export function libsql(credentials: LibSqlCredentials): LibsqlConnection {
+export function libsql(credentials: Client | LibSqlCredentials): LibsqlConnection {
    return new LibsqlConnection(credentials);
 }

app/src/data/connection/sqlite/SqliteConnection.ts

@@ -11,7 +11,9 @@ import { Connection, type DbFunctions, type FieldSpec, type SchemaResponse } fro
 import type { Constructor } from "core";
 import { customIntrospector } from "../Connection";
 import { SqliteIntrospector } from "./SqliteIntrospector";
+import type { Field } from "data/fields/Field";
 
+// @todo: add pragmas
 export type SqliteConnectionConfig<
    CustomDialect extends Constructor<Dialect> = Constructor<Dialect>,
 > = {
@@ -80,4 +82,24 @@ export abstract class SqliteConnection<Client = unknown> extends Connection<Clie
          },
       ] as const;
    }
+
+   override toDriver(value: unknown, field: Field): unknown {
+      if (field.type === "boolean") {
+         return value ? 1 : 0;
+      }
+      if (typeof value === "undefined") {
+         return null;
+      }
+      return value;
+   }
+
+   override fromDriver(value: any, field: Field): unknown {
+      if (field.type === "boolean" && typeof value === "number") {
+         return value === 1;
+      }
+      if (value === null) {
+         return undefined;
+      }
+      return value;
+   }
 }