351 lines
8.9 KiB
Go
351 lines
8.9 KiB
Go
// Copyright 2017 Frédéric Guillot. All rights reserved.
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// Use of this source code is governed by the Apache 2.0
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// license that can be found in the LICENSE file.
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package storage
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import (
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"fmt"
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"strings"
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"time"
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"github.com/lib/pq"
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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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// EntryQueryBuilder builds a SQL query to fetch entries.
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type EntryQueryBuilder struct {
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store *Storage
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feedID int64
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userID int64
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categoryID int64
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status string
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notStatus string
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order string
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direction string
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limit int
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offset int
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entryID int64
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greaterThanEntryID int64
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entryIDs []int64
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before *time.Time
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starred bool
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}
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// WithStarred adds starred filter.
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func (e *EntryQueryBuilder) WithStarred() *EntryQueryBuilder {
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e.starred = true
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return e
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}
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// Before add condition base on the entry date.
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func (e *EntryQueryBuilder) Before(date *time.Time) *EntryQueryBuilder {
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e.before = date
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return e
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}
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// WithGreaterThanEntryID adds a condition > entryID.
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func (e *EntryQueryBuilder) WithGreaterThanEntryID(entryID int64) *EntryQueryBuilder {
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e.greaterThanEntryID = entryID
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return e
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}
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// WithEntryIDs adds a condition to fetch only the given entry IDs.
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func (e *EntryQueryBuilder) WithEntryIDs(entryIDs []int64) *EntryQueryBuilder {
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e.entryIDs = entryIDs
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return e
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}
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// WithEntryID set the entryID.
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func (e *EntryQueryBuilder) WithEntryID(entryID int64) *EntryQueryBuilder {
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e.entryID = entryID
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return e
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}
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// WithFeedID set the feedID.
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func (e *EntryQueryBuilder) WithFeedID(feedID int64) *EntryQueryBuilder {
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e.feedID = feedID
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return e
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}
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// WithCategoryID set the categoryID.
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func (e *EntryQueryBuilder) WithCategoryID(categoryID int64) *EntryQueryBuilder {
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e.categoryID = categoryID
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return e
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}
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// WithStatus set the entry status.
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func (e *EntryQueryBuilder) WithStatus(status string) *EntryQueryBuilder {
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e.status = status
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return e
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}
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// WithoutStatus set the entry status that should not be returned.
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func (e *EntryQueryBuilder) WithoutStatus(status string) *EntryQueryBuilder {
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e.notStatus = status
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return e
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}
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// WithOrder set the sorting order.
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func (e *EntryQueryBuilder) WithOrder(order string) *EntryQueryBuilder {
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e.order = order
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return e
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}
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// WithDirection set the sorting direction.
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func (e *EntryQueryBuilder) WithDirection(direction string) *EntryQueryBuilder {
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e.direction = direction
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return e
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}
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// WithLimit set the limit.
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func (e *EntryQueryBuilder) WithLimit(limit int) *EntryQueryBuilder {
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e.limit = limit
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return e
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}
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// WithOffset set the offset.
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func (e *EntryQueryBuilder) WithOffset(offset int) *EntryQueryBuilder {
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e.offset = offset
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return e
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}
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// CountEntries count the number of entries that match the condition.
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func (e *EntryQueryBuilder) CountEntries() (count int, err error) {
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defer timer.ExecutionTime(
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time.Now(),
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fmt.Sprintf("[EntryQueryBuilder:CountEntries] userID=%d, feedID=%d, status=%s", e.userID, e.feedID, e.status),
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)
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query := `SELECT count(*) FROM entries e LEFT JOIN feeds f ON f.id=e.feed_id WHERE %s`
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args, condition := e.buildCondition()
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err = e.store.db.QueryRow(fmt.Sprintf(query, condition), args...).Scan(&count)
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if err != nil {
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return 0, fmt.Errorf("unable to count entries: %v", err)
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}
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return count, nil
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}
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// GetEntry returns a single entry that match the condition.
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func (e *EntryQueryBuilder) GetEntry() (*model.Entry, error) {
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e.limit = 1
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entries, err := e.GetEntries()
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if err != nil {
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return nil, err
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}
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if len(entries) != 1 {
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return nil, nil
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}
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entries[0].Enclosures, err = e.store.GetEnclosures(entries[0].ID)
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if err != nil {
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return nil, err
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}
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return entries[0], nil
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}
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// GetEntries returns a list of entries that match the condition.
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func (e *EntryQueryBuilder) GetEntries() (model.Entries, error) {
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debugStr := "[EntryQueryBuilder:GetEntries] userID=%d, feedID=%d, categoryID=%d, status=%s, order=%s, direction=%s, offset=%d, limit=%d"
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defer timer.ExecutionTime(time.Now(), fmt.Sprintf(debugStr, e.userID, e.feedID, e.categoryID, e.status, e.order, e.direction, e.offset, e.limit))
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query := `
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SELECT
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e.id, e.user_id, e.feed_id, e.hash, e.published_at at time zone u.timezone, e.title,
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e.url, e.author, e.content, e.status, e.starred,
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f.title as feed_title, f.feed_url, f.site_url, f.checked_at,
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f.category_id, c.title as category_title, f.scraper_rules, f.rewrite_rules, f.crawler,
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fi.icon_id
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FROM entries e
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LEFT JOIN feeds f ON f.id=e.feed_id
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LEFT JOIN categories c ON c.id=f.category_id
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LEFT JOIN feed_icons fi ON fi.feed_id=f.id
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LEFT JOIN users u ON u.id=e.user_id
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WHERE %s %s
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`
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args, conditions := e.buildCondition()
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query = fmt.Sprintf(query, conditions, e.buildSorting())
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// log.Println(query)
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rows, err := e.store.db.Query(query, args...)
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if err != nil {
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return nil, fmt.Errorf("unable to get entries: %v", err)
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}
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defer rows.Close()
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entries := make(model.Entries, 0)
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for rows.Next() {
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var entry model.Entry
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var iconID interface{}
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entry.Feed = &model.Feed{UserID: e.userID}
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entry.Feed.Category = &model.Category{UserID: e.userID}
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entry.Feed.Icon = &model.FeedIcon{}
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err := rows.Scan(
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&entry.ID,
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&entry.UserID,
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&entry.FeedID,
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&entry.Hash,
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&entry.Date,
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&entry.Title,
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&entry.URL,
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&entry.Author,
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&entry.Content,
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&entry.Status,
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&entry.Starred,
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&entry.Feed.Title,
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&entry.Feed.FeedURL,
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&entry.Feed.SiteURL,
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&entry.Feed.CheckedAt,
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&entry.Feed.Category.ID,
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&entry.Feed.Category.Title,
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&entry.Feed.ScraperRules,
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&entry.Feed.RewriteRules,
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&entry.Feed.Crawler,
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&iconID,
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)
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if err != nil {
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return nil, fmt.Errorf("unable to fetch entry row: %v", err)
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}
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if iconID == nil {
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entry.Feed.Icon.IconID = 0
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} else {
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entry.Feed.Icon.IconID = iconID.(int64)
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}
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entry.Feed.ID = entry.FeedID
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entry.Feed.Icon.FeedID = entry.FeedID
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entries = append(entries, &entry)
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}
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return entries, nil
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}
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// GetEntryIDs returns a list of entry IDs that match the condition.
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func (e *EntryQueryBuilder) GetEntryIDs() ([]int64, error) {
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debugStr := "[EntryQueryBuilder:GetEntryIDs] userID=%d, feedID=%d, categoryID=%d, status=%s, order=%s, direction=%s, offset=%d, limit=%d"
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defer timer.ExecutionTime(time.Now(), fmt.Sprintf(debugStr, e.userID, e.feedID, e.categoryID, e.status, e.order, e.direction, e.offset, e.limit))
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query := `
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SELECT
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e.id
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FROM entries e
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LEFT JOIN feeds f ON f.id=e.feed_id
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WHERE %s %s
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`
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args, conditions := e.buildCondition()
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query = fmt.Sprintf(query, conditions, e.buildSorting())
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// log.Println(query)
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rows, err := e.store.db.Query(query, args...)
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if err != nil {
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return nil, fmt.Errorf("unable to get entries: %v", err)
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}
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defer rows.Close()
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var entryIDs []int64
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for rows.Next() {
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var entryID int64
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err := rows.Scan(&entryID)
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if err != nil {
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return nil, fmt.Errorf("unable to fetch entry row: %v", err)
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}
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entryIDs = append(entryIDs, entryID)
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}
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return entryIDs, nil
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}
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func (e *EntryQueryBuilder) buildCondition() ([]interface{}, string) {
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args := []interface{}{e.userID}
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conditions := []string{"e.user_id = $1"}
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if e.categoryID != 0 {
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conditions = append(conditions, fmt.Sprintf("f.category_id=$%d", len(args)+1))
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args = append(args, e.categoryID)
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}
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if e.feedID != 0 {
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conditions = append(conditions, fmt.Sprintf("e.feed_id=$%d", len(args)+1))
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args = append(args, e.feedID)
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}
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if e.entryID != 0 {
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conditions = append(conditions, fmt.Sprintf("e.id=$%d", len(args)+1))
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args = append(args, e.entryID)
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}
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if e.greaterThanEntryID != 0 {
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conditions = append(conditions, fmt.Sprintf("e.id > $%d", len(args)+1))
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args = append(args, e.greaterThanEntryID)
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}
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if e.entryIDs != nil {
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conditions = append(conditions, fmt.Sprintf("e.id=ANY($%d)", len(args)+1))
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args = append(args, pq.Array(e.entryIDs))
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}
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if e.status != "" {
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conditions = append(conditions, fmt.Sprintf("e.status=$%d", len(args)+1))
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args = append(args, e.status)
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}
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if e.notStatus != "" {
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conditions = append(conditions, fmt.Sprintf("e.status != $%d", len(args)+1))
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args = append(args, e.notStatus)
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}
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if e.before != nil {
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conditions = append(conditions, fmt.Sprintf("e.published_at < $%d", len(args)+1))
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args = append(args, e.before)
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}
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if e.starred {
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conditions = append(conditions, "e.starred is true")
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}
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return args, strings.Join(conditions, " AND ")
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}
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func (e *EntryQueryBuilder) buildSorting() string {
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var queries []string
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if e.order != "" {
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queries = append(queries, fmt.Sprintf(`ORDER BY "%s"`, e.order))
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}
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if e.direction != "" {
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queries = append(queries, fmt.Sprintf(`%s`, e.direction))
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}
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if e.limit != 0 {
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queries = append(queries, fmt.Sprintf(`LIMIT %d`, e.limit))
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}
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if e.offset != 0 {
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queries = append(queries, fmt.Sprintf(`OFFSET %d`, e.offset))
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}
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return strings.Join(queries, " ")
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}
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// NewEntryQueryBuilder returns a new EntryQueryBuilder.
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func NewEntryQueryBuilder(store *Storage, userID int64) *EntryQueryBuilder {
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return &EntryQueryBuilder{
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store: store,
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userID: userID,
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starred: false,
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}
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}
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