aboutsummaryrefslogtreecommitdiffhomepage
path: root/storage/category.go
blob: 07206c081746d842d420ccd36f278f2f0789345c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
// 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 "miniflux.app/storage"

import (
	"database/sql"
	"errors"
	"fmt"

	"miniflux.app/model"
)

// AnotherCategoryExists checks if another category exists with the same title.
func (s *Storage) AnotherCategoryExists(userID, categoryID int64, title string) bool {
	var result bool
	query := `SELECT true FROM categories WHERE user_id=$1 AND id != $2 AND title=$3`
	s.db.QueryRow(query, userID, categoryID, title).Scan(&result)
	return result
}

// CategoryExists checks if the given category exists into the database.
func (s *Storage) CategoryExists(userID, categoryID int64) bool {
	var result bool
	query := `SELECT true FROM categories WHERE user_id=$1 AND id=$2`
	s.db.QueryRow(query, userID, categoryID).Scan(&result)
	return result
}

// Category returns a category from the database.
func (s *Storage) Category(userID, categoryID int64) (*model.Category, error) {
	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)

	switch {
	case err == sql.ErrNoRows:
		return nil, nil
	case err != nil:
		return nil, fmt.Errorf(`store: unable to fetch category: %v`, err)
	default:
		return &category, nil
	}
}

// FirstCategory returns the first category for the given user.
func (s *Storage) FirstCategory(userID int64) (*model.Category, error) {
	query := `SELECT id, user_id, title FROM categories WHERE user_id=$1 ORDER BY title ASC LIMIT 1`

	var category model.Category
	err := s.db.QueryRow(query, userID).Scan(&category.ID, &category.UserID, &category.Title)

	switch {
	case err == sql.ErrNoRows:
		return nil, nil
	case err != nil:
		return nil, fmt.Errorf(`store: unable to fetch category: %v`, err)
	default:
		return &category, nil
	}
}

// CategoryByTitle finds a category by the title.
func (s *Storage) CategoryByTitle(userID int64, title string) (*model.Category, error) {
	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)

	switch {
	case err == sql.ErrNoRows:
		return nil, nil
	case err != nil:
		return nil, fmt.Errorf(`store: unable to fetch category: %v`, err)
	default:
		return &category, nil
	}
}

// Categories returns all categories that belongs to the given user.
func (s *Storage) Categories(userID int64) (model.Categories, error) {
	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(`store: 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(`store: unable to fetch category 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) {
	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
		ORDER BY c.title ASC
	`

	rows, err := s.db.Query(query, userID)
	if err != nil {
		return nil, fmt.Errorf(`store: 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(`store: unable to fetch category row: %v`, err)
		}

		categories = append(categories, &category)
	}

	return categories, nil
}

// CreateCategory creates a new category.
func (s *Storage) CreateCategory(category *model.Category) error {
	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(`store: unable to create category: %v`, err)
	}

	return nil
}

// UpdateCategory updates an existing category.
func (s *Storage) UpdateCategory(category *model.Category) error {
	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(`store: unable to update category: %v`, err)
	}

	return nil
}

// RemoveCategory deletes a category.
func (s *Storage) RemoveCategory(userID, categoryID int64) error {
	query := `DELETE FROM categories WHERE id = $1 AND user_id = $2`
	result, err := s.db.Exec(query, categoryID, userID)
	if err != nil {
		return fmt.Errorf(`store: unable to remove this category: %v`, err)
	}

	count, err := result.RowsAffected()
	if err != nil {
		return fmt.Errorf(`store: unable to remove this category: %v`, err)
	}

	if count == 0 {
		return errors.New(`store: no category has been removed`)
	}

	return nil
}