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miniflux/storage/category.go

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// 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"
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"github.com/miniflux/miniflux/model"
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"github.com/miniflux/miniflux/timer"
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)
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// AnotherCategoryExists checks if another category exists with the same title.
func (s *Storage) AnotherCategoryExists(userID, categoryID int64, title string) bool {
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defer timer.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
}
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// CategoryExists checks if the given category exists into the database.
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func (s *Storage) CategoryExists(userID, categoryID int64) bool {
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defer timer.ExecutionTime(time.Now(), fmt.Sprintf("[Storage:CategoryExists] userID=%d, categoryID=%d", userID, categoryID))
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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
}
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// Category returns a category from the database.
func (s *Storage) Category(userID, categoryID int64) (*model.Category, error) {
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defer timer.ExecutionTime(time.Now(), fmt.Sprintf("[Storage:Category] userID=%d, getCategory=%d", userID, categoryID))
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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 {
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return nil, fmt.Errorf("unable to fetch category: %v", err)
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}
return &category, nil
}
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// FirstCategory returns the first category for the given user.
func (s *Storage) FirstCategory(userID int64) (*model.Category, error) {
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defer timer.ExecutionTime(time.Now(), fmt.Sprintf("[Storage:FirstCategory] userID=%d", userID))
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var category model.Category
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query := `SELECT id, user_id, title FROM categories WHERE user_id=$1 ORDER BY title ASC LIMIT 1`
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err := s.db.QueryRow(query, userID).Scan(&category.ID, &category.UserID, &category.Title)
if err == sql.ErrNoRows {
return nil, nil
} else if err != nil {
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return nil, fmt.Errorf("unable to fetch category: %v", err)
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}
return &category, nil
}
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// CategoryByTitle finds a category by the title.
func (s *Storage) CategoryByTitle(userID int64, title string) (*model.Category, error) {
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defer timer.ExecutionTime(time.Now(), fmt.Sprintf("[Storage:CategoryByTitle] userID=%d, title=%s", userID, title))
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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
}
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// Categories returns all categories that belongs to the given user.
func (s *Storage) Categories(userID int64) (model.Categories, error) {
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defer timer.ExecutionTime(time.Now(), fmt.Sprintf("[Storage:Categories] userID=%d", userID))
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query := `SELECT id, user_id, title FROM categories WHERE user_id=$1 ORDER BY title ASC`
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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
}
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// CategoriesWithFeedCount returns all categories with the number of feeds.
func (s *Storage) CategoriesWithFeedCount(userID int64) (model.Categories, error) {
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defer timer.ExecutionTime(time.Now(), fmt.Sprintf("[Storage:CategoriesWithFeedCount] userID=%d", userID))
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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
}
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// CreateCategory creates a new category.
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func (s *Storage) CreateCategory(category *model.Category) error {
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defer timer.ExecutionTime(time.Now(), fmt.Sprintf("[Storage:CreateCategory] title=%s", category.Title))
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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
}
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// UpdateCategory updates an existing category.
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func (s *Storage) UpdateCategory(category *model.Category) error {
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defer timer.ExecutionTime(time.Now(), fmt.Sprintf("[Storage:UpdateCategory] categoryID=%d", category.ID))
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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
}
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// RemoveCategory deletes a category.
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func (s *Storage) RemoveCategory(userID, categoryID int64) error {
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defer timer.ExecutionTime(time.Now(), fmt.Sprintf("[Storage:RemoveCategory] userID=%d, categoryID=%d", userID, categoryID))
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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
}