refactor(services): update methods in ModelService

Removed `getByIdModel`, `getByCategoryModel`, and `getModelsByBrand` methods. These changes are to refine the methods available in ModelService for better usage and understanding.

Issue: #27
Signed-off-by: Mathis <yidhra@tuta.io>

src/services/model.service.ts

@@ -45,7 +45,7 @@ async function createModel(data: IDbModel): Promise<boolean> {
  * @return {Promise<boolean>} - A promise that resolves to a boolean indicating whether the update was successful or not.
  */
 async function updateModel(data: IDbModel): Promise<boolean> {
-	logger.info(`Updating model... (${id})`);
+	logger.info(`Updating model... (${data.slug_name})`);
 	try {
 		await MysqlService.Model.update(DbHandler, {
 			display_name: data.display_name,
@@ -64,15 +64,91 @@ async function updateModel(data: IDbModel): Promise<boolean> {
 	}
 }
 
+/**
+ * Deletes a model from the database.
+ *
+ * @param {string} modelSlug - The slug of the model to be deleted.
+ * @return {Promise<boolean>} - A promise that resolves to true if the deletion is successful, else false.
+ */
+async function deleteModel(modelSlug: string): Promise<boolean> {
+	if (!modelSlug) {
+		logger.error("Model slug is missing");
+		return false
+	}
+	logger.info(`Deleting model with ID: ${modelSlug}`);
+	const doesExist = await MysqlService.Model.getBySlug(DbHandler, modelSlug);
+	if (!doesExist || !doesExist.id) {
+    logger.warn(`Model with slug ${modelSlug} not found`);
+    return false;
+  }
+	try {
+		await MysqlService.Model.delete(DbHandler, doesExist.id);
+		logger.info("Deletion Successful !");
+		return true;
+	} catch (error) {
+		logger.error(`Error deleting model: ${error}`);
+		return false;
+	}
+}
+
+
+/**
+ * Fetches a model by slug from the database.
+ *
+ * @param {string} modelSlug - The slug of the model to be fetched.
+ * @return {Promise<IDbModel | null>} - A promise that resolves to the model if found, else null.
+ */
+async function getBySlugModel(modelSlug: string): Promise<IDbModel | null> {
+	logger.info(`Fetching model with slug: ${modelSlug}`);
+	try {
+		const model = await MysqlService.Model.getBySlug(DbHandler, modelSlug);
+		if (!model) {
+			logger.warn(`Model with slug ${modelSlug} not found`);
+			return null;
+		}
+		return model;
+	} catch (error) {
+		logger.error(`Error fetching model by slug: ${error}`);
+		return null;
+	}
+}
+
+
+/**
+ * Fetches all models from the database.
+ *
+ * @return {Promise<IDbModel[] | null>} - A promise that resolves to an array of all models if found, else null.
+ */
+async function getAllModels(): Promise<IDbModel[] | null> {
+	logger.info("Fetching all models from the database");
+	try {
+		const models = await MysqlService.Model.getAll(DbHandler);
+		if (!models || models.length === 0) {
+			logger.warn("No models found on the database");
+			return null;
+		}
+		logger.info(`Found ${models.length} model(s)`)
+		return models;
+	} catch (error) {
+		logger.error(`Error fetching all models: ${error}`);
+		return null;
+	}
+}
+
+
+
+/**
+ * ModelService is responsible for managing models.
+ * @namespace
+ */
 const ModelService = {
 	create: createModel,
 	update: updateModel,
 	delete: deleteModel,
 	getBySlug: getBySlugModel,
 	getAll: getAllModels,
-	getById: getByIdModel,
-	getByCategory: getByCategoryModel,
-	getByBrand: getModelsByBrand,
+	//getByCategory: getByCategoryModel,
+	//getByBrand: getModelsByBrand,
 }
 
 export default ModelService;