add screens

app/lib/__tests__/settings.spec.ts

@@ -0,0 +1,73 @@
+import {describe, expect, beforeEach} from '@jest/globals';
+import {Settings} from '@/app/lib/settings';
+import { getDb } from '@/app/lib/db';
+
+describe('Settings', () => {
+    let settings: Settings;
+
+    beforeEach(async () => {
+        // Initialize your Settings class here with a fresh database instance
+        settings = new Settings(await getDb());
+    });
+
+    afterEach(async () => {
+        // Clean up the database after each test
+        await settings.db.executeSql('DELETE FROM settings');
+    });
+
+    describe('setHostLanguage', () => {
+        it('should set the host language in the database', async () => {
+            const value = 'en';
+            await settings.setHostLanguage(value);
+
+            const result = await settings.getHostLanguage();
+            expect(result).toEqual(value);
+        });
+    });
+
+    describe('getHostLanguage', () => {
+        it('should return the host language from the database', async () => {
+            const value = 'fr';
+            await settings.db.executeSql(
+                `INSERT INTO settings (host_language) VALUES (?)`,
+                [value]
+            );
+
+            const result = await settings.getHostLanguage();
+            expect(result).toEqual(value);
+        });
+
+        it('should return null if the host language is not set', async () => {
+            const result = await settings.getHostLanguage();
+            expect(result).not.toBeNull();
+        });
+    });
+
+    describe('setLibretranslateBaseUrl', () => {
+        it('should set the LibreTranslate base URL in the database', async () => {
+            const value = 'https://example.com';
+            await settings.setLibetransalteBaseUrl(value);
+
+            const result = await settings.getLibretranslateBaseUrl();
+            expect(result).toEqual(value);
+        });
+    });
+
+    describe('getLibretranslateBaseUrl', () => {
+        it('should return the LibreTranslate base URL from the database', async () => {
+            const value = 'https://another-example.com';
+            await settings.db.executeSql(
+                `INSERT INTO settings (libetransalte_base_url) VALUES (?)`,
+                [value]
+            );
+
+            const result = await settings.getLibretranslateBaseUrl();
+            expect(result).toEqual(value);
+        });
+
+        it('should return null if the LibreTranslate base URL is not set', async () => {
+            const result = await settings.getLibretranslateBaseUrl();
+            expect(result).not.toBeNull();
+        });
+    });
+});

app/lib/settings.ts

@@ -0,0 +1,46 @@
+import { SQLiteDatabase } from "react-native-sqlite-storage";
+
+export class Settings {
+
+    constructor(public db: SQLiteDatabase) {
+
+    }
+
+    private async getValue(key: string) {
+        const query = `
+SELECT ${key}
+FROM settings
+LIMIT 1`
+        const result = await this.db.executeSql(
+            query
+        );
+        
+        result[0].rows.item(0).host_language;
+    }
+
+    private async setValue(key: string, value: any) {
+        const statement = `INSERT INTO settings (${key})
+SELECT '?'
+ON CONFLICT DO UPDATE SET ${key} = ?`
+        await this.db.transaction(async (tx) => {
+            await tx.executeSql(statement, [value, value]);
+        })
+    }
+
+    async setHostLanguage(value: string) {
+        await this.setValue("host_language", value);
+    }
+
+    async getHostLanguage() {
+        return await this.getValue("host_language")
+    }
+
+    async setLibetransalteBaseUrl(value : string) {
+        await this.setValue("libetransalte_base_url", value)
+    }
+
+    async getLibretranslateBaseUrl() {
+        await this.getValue("libtretranslate_base_url")
+    }
+
+}