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miniflux/storage/category.go
2017-11-27 21:40:05 -08:00

198 lines
6.3 KiB
Go

// 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"
"time"
"github.com/miniflux/miniflux2/helper"
"github.com/miniflux/miniflux2/model"
)
// AnotherCategoryExists checks if another category exists with the same title.
func (s *Storage) AnotherCategoryExists(userID, categoryID int64, title string) bool {
defer helper.ExecutionTime(time.Now(), fmt.Sprintf("[Storage:AnotherCategoryExists] userID=%d, categoryID=%d, title=%s", userID, categoryID, title))
var result int
query := `SELECT count(*) as c FROM categories WHERE user_id=$1 AND id != $2 AND title=$3`
s.db.QueryRow(query, userID, categoryID, title).Scan(&result)
return result >= 1
}
// CategoryExists checks if the given category exists into the database.
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
}
// Category returns a category from the database.
func (s *Storage) Category(userID, categoryID int64) (*model.Category, error) {
defer helper.ExecutionTime(time.Now(), fmt.Sprintf("[Storage:Category] 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
}
// FirstCategory returns the first category for the given user.
func (s *Storage) FirstCategory(userID int64) (*model.Category, error) {
defer helper.ExecutionTime(time.Now(), fmt.Sprintf("[Storage:FirstCategory] userID=%d", userID))
var category model.Category
query := `SELECT id, user_id, title FROM categories WHERE user_id=$1 ORDER BY title ASC LIMIT 1`
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
}
// CategoryByTitle finds a category by the title.
func (s *Storage) CategoryByTitle(userID int64, title string) (*model.Category, error) {
defer helper.ExecutionTime(time.Now(), fmt.Sprintf("[Storage:CategoryByTitle] 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
}
// Categories returns all categories that belongs to the given user.
func (s *Storage) Categories(userID int64) (model.Categories, error) {
defer helper.ExecutionTime(time.Now(), fmt.Sprintf("[Storage:Categories] userID=%d", userID))
query := `SELECT id, user_id, title FROM categories WHERE user_id=$1 ORDER BY title ASC`
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
}
// CategoriesWithFeedCount returns all categories with the number of feeds.
func (s *Storage) CategoriesWithFeedCount(userID int64) (model.Categories, error) {
defer helper.ExecutionTime(time.Now(), fmt.Sprintf("[Storage:CategoriesWithFeedCount] 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
}
// CreateCategory creates a new category.
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
}
// UpdateCategory updates an existing category.
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
}
// RemoveCategory deletes a category.
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
}