First commit

storage/category.go

@@ -0,0 +1,178 @@
+// Copyright 2017 Frédéric Guillot. All rights reserved.
+// Use of this source code is governed by the Apache 2.0
+// license that can be found in the LICENSE file.
+
+package storage
+
+import (
+	"database/sql"
+	"errors"
+	"fmt"
+	"github.com/miniflux/miniflux2/helper"
+	"github.com/miniflux/miniflux2/model"
+	"time"
+)
+
+func (s *Storage) CategoryExists(userID, categoryID int64) bool {
+	defer helper.ExecutionTime(time.Now(), fmt.Sprintf("[Storage:CategoryExists] userID=%d, categoryID=%d", userID, categoryID))
+
+	var result int
+	query := `SELECT count(*) as c FROM categories WHERE user_id=$1 AND id=$2`
+	s.db.QueryRow(query, userID, categoryID).Scan(&result)
+	return result >= 1
+}
+
+func (s *Storage) GetCategory(userID, categoryID int64) (*model.Category, error) {
+	defer helper.ExecutionTime(time.Now(), fmt.Sprintf("[Storage:GetCategory] userID=%d, getCategory=%d", userID, categoryID))
+	var category model.Category
+
+	query := `SELECT id, user_id, title FROM categories WHERE user_id=$1 AND id=$2`
+	err := s.db.QueryRow(query, userID, categoryID).Scan(&category.ID, &category.UserID, &category.Title)
+	if err == sql.ErrNoRows {
+		return nil, nil
+	} else if err != nil {
+		return nil, fmt.Errorf("Unable to fetch category: %v", err)
+	}
+
+	return &category, nil
+}
+
+func (s *Storage) GetFirstCategory(userID int64) (*model.Category, error) {
+	defer helper.ExecutionTime(time.Now(), fmt.Sprintf("[Storage:GetFirstCategory] userID=%d", userID))
+	var category model.Category
+
+	query := `SELECT id, user_id, title FROM categories WHERE user_id=$1 ORDER BY title ASC`
+	err := s.db.QueryRow(query, userID).Scan(&category.ID, &category.UserID, &category.Title)
+	if err == sql.ErrNoRows {
+		return nil, nil
+	} else if err != nil {
+		return nil, fmt.Errorf("Unable to fetch category: %v", err)
+	}
+
+	return &category, nil
+}
+
+func (s *Storage) GetCategoryByTitle(userID int64, title string) (*model.Category, error) {
+	defer helper.ExecutionTime(time.Now(), fmt.Sprintf("[Storage:GetCategoryByTitle] userID=%d, title=%s", userID, title))
+	var category model.Category
+
+	query := `SELECT id, user_id, title FROM categories WHERE user_id=$1 AND title=$2`
+	err := s.db.QueryRow(query, userID, title).Scan(&category.ID, &category.UserID, &category.Title)
+	if err == sql.ErrNoRows {
+		return nil, nil
+	} else if err != nil {
+		return nil, fmt.Errorf("Unable to fetch category: %v", err)
+	}
+
+	return &category, nil
+}
+
+func (s *Storage) GetCategories(userID int64) (model.Categories, error) {
+	defer helper.ExecutionTime(time.Now(), fmt.Sprintf("[Storage:GetCategories] userID=%d", userID))
+
+	query := `SELECT id, user_id, title FROM categories WHERE user_id=$1`
+	rows, err := s.db.Query(query, userID)
+	if err != nil {
+		return nil, fmt.Errorf("Unable to fetch categories: %v", err)
+	}
+	defer rows.Close()
+
+	categories := make(model.Categories, 0)
+	for rows.Next() {
+		var category model.Category
+		if err := rows.Scan(&category.ID, &category.UserID, &category.Title); err != nil {
+			return nil, fmt.Errorf("Unable to fetch categories row: %v", err)
+		}
+
+		categories = append(categories, &category)
+	}
+
+	return categories, nil
+}
+
+func (s *Storage) GetCategoriesWithFeedCount(userID int64) (model.Categories, error) {
+	defer helper.ExecutionTime(time.Now(), fmt.Sprintf("[Storage:GetCategoriesWithFeedCount] userID=%d", userID))
+	query := `SELECT
+		c.id, c.user_id, c.title,
+		(SELECT count(*) FROM feeds WHERE feeds.category_id=c.id) AS count
+		FROM categories c WHERE user_id=$1`
+
+	rows, err := s.db.Query(query, userID)
+	if err != nil {
+		return nil, fmt.Errorf("Unable to fetch categories: %v", err)
+	}
+	defer rows.Close()
+
+	categories := make(model.Categories, 0)
+	for rows.Next() {
+		var category model.Category
+		if err := rows.Scan(&category.ID, &category.UserID, &category.Title, &category.FeedCount); err != nil {
+			return nil, fmt.Errorf("Unable to fetch categories row: %v", err)
+		}
+
+		categories = append(categories, &category)
+	}
+
+	return categories, nil
+}
+
+func (s *Storage) CreateCategory(category *model.Category) error {
+	defer helper.ExecutionTime(time.Now(), fmt.Sprintf("[Storage:CreateCategory] title=%s", category.Title))
+
+	query := `
+		INSERT INTO categories
+		(user_id, title)
+		VALUES
+		($1, $2)
+		RETURNING id
+	`
+	err := s.db.QueryRow(
+		query,
+		category.UserID,
+		category.Title,
+	).Scan(&category.ID)
+
+	if err != nil {
+		return fmt.Errorf("Unable to create category: %v", err)
+	}
+
+	return nil
+}
+
+func (s *Storage) UpdateCategory(category *model.Category) error {
+	defer helper.ExecutionTime(time.Now(), fmt.Sprintf("[Storage:UpdateCategory] categoryID=%d", category.ID))
+
+	query := `UPDATE categories SET title=$1 WHERE id=$2 AND user_id=$3`
+	_, err := s.db.Exec(
+		query,
+		category.Title,
+		category.ID,
+		category.UserID,
+	)
+
+	if err != nil {
+		return fmt.Errorf("Unable to update category: %v", err)
+	}
+
+	return nil
+}
+
+func (s *Storage) RemoveCategory(userID, categoryID int64) error {
+	defer helper.ExecutionTime(time.Now(), fmt.Sprintf("[Storage:RemoveCategory] userID=%d, categoryID=%d", userID, categoryID))
+
+	result, err := s.db.Exec("DELETE FROM categories WHERE id = $1 AND user_id = $2", categoryID, userID)
+	if err != nil {
+		return fmt.Errorf("Unable to remove this category: %v", err)
+	}
+
+	count, err := result.RowsAffected()
+	if err != nil {
+		return fmt.Errorf("Unable to remove this category: %v", err)
+	}
+
+	if count == 0 {
+		return errors.New("no category has been removed")
+	}
+
+	return nil
+}