307 lines
7.2 KiB
Go
307 lines
7.2 KiB
Go
// SPDX-FileCopyrightText: Copyright The Miniflux Authors. All rights reserved.
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// SPDX-License-Identifier: Apache-2.0
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package storage // import "miniflux.app/v2/internal/storage"
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import (
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"database/sql"
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"fmt"
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"strings"
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"miniflux.app/v2/internal/model"
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"miniflux.app/v2/internal/timezone"
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)
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// FeedQueryBuilder builds a SQL query to fetch feeds.
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type FeedQueryBuilder struct {
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store *Storage
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args []interface{}
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conditions []string
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sortExpressions []string
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limit int
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offset int
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withCounters bool
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counterJoinFeeds bool
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counterArgs []interface{}
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counterConditions []string
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}
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// NewFeedQueryBuilder returns a new FeedQueryBuilder.
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func NewFeedQueryBuilder(store *Storage, userID int64) *FeedQueryBuilder {
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return &FeedQueryBuilder{
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store: store,
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args: []interface{}{userID},
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conditions: []string{"f.user_id = $1"},
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counterArgs: []interface{}{userID, model.EntryStatusRead, model.EntryStatusUnread},
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counterConditions: []string{"e.user_id = $1", "e.status IN ($2, $3)"},
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}
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}
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// WithCategoryID filter by category ID.
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func (f *FeedQueryBuilder) WithCategoryID(categoryID int64) *FeedQueryBuilder {
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if categoryID > 0 {
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f.conditions = append(f.conditions, fmt.Sprintf("f.category_id = $%d", len(f.args)+1))
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f.args = append(f.args, categoryID)
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f.counterConditions = append(f.counterConditions, fmt.Sprintf("f.category_id = $%d", len(f.counterArgs)+1))
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f.counterArgs = append(f.counterArgs, categoryID)
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f.counterJoinFeeds = true
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}
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return f
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}
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// WithFeedID filter by feed ID.
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func (f *FeedQueryBuilder) WithFeedID(feedID int64) *FeedQueryBuilder {
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if feedID > 0 {
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f.conditions = append(f.conditions, fmt.Sprintf("f.id = $%d", len(f.args)+1))
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f.args = append(f.args, feedID)
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}
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return f
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}
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// WithCounters let the builder return feeds with counters of statuses of entries.
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func (f *FeedQueryBuilder) WithCounters() *FeedQueryBuilder {
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f.withCounters = true
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return f
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}
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// WithSorting add a sort expression.
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func (f *FeedQueryBuilder) WithSorting(column, direction string) *FeedQueryBuilder {
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f.sortExpressions = append(f.sortExpressions, fmt.Sprintf("%s %s", column, direction))
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return f
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}
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// WithLimit set the limit.
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func (f *FeedQueryBuilder) WithLimit(limit int) *FeedQueryBuilder {
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f.limit = limit
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return f
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}
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// WithOffset set the offset.
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func (f *FeedQueryBuilder) WithOffset(offset int) *FeedQueryBuilder {
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f.offset = offset
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return f
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}
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func (f *FeedQueryBuilder) buildCondition() string {
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return strings.Join(f.conditions, " AND ")
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}
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func (f *FeedQueryBuilder) buildCounterCondition() string {
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return strings.Join(f.counterConditions, " AND ")
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}
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func (f *FeedQueryBuilder) buildSorting() string {
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var parts []string
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if len(f.sortExpressions) > 0 {
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parts = append(parts, fmt.Sprintf(`ORDER BY %s`, strings.Join(f.sortExpressions, ", ")))
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}
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if len(parts) > 0 {
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parts = append(parts, ", lower(f.title) ASC")
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}
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if f.limit > 0 {
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parts = append(parts, fmt.Sprintf(`LIMIT %d`, f.limit))
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}
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if f.offset > 0 {
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parts = append(parts, fmt.Sprintf(`OFFSET %d`, f.offset))
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}
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return strings.Join(parts, " ")
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}
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// GetFeed returns a single feed that match the condition.
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func (f *FeedQueryBuilder) GetFeed() (*model.Feed, error) {
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f.limit = 1
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feeds, err := f.GetFeeds()
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if err != nil {
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return nil, err
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}
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if len(feeds) != 1 {
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return nil, nil
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}
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return feeds[0], nil
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}
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// GetFeeds returns a list of feeds that match the condition.
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func (f *FeedQueryBuilder) GetFeeds() (model.Feeds, error) {
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var query = `
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SELECT
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f.id,
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f.feed_url,
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f.site_url,
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f.title,
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f.etag_header,
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f.last_modified_header,
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f.user_id,
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f.checked_at at time zone u.timezone,
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f.parsing_error_count,
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f.parsing_error_msg,
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f.scraper_rules,
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f.rewrite_rules,
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f.blocklist_rules,
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f.keeplist_rules,
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f.url_rewrite_rules,
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f.crawler,
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f.user_agent,
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f.cookie,
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f.username,
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f.password,
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f.ignore_http_cache,
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f.allow_self_signed_certificates,
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f.fetch_via_proxy,
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f.disabled,
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f.no_media_player,
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f.hide_globally,
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f.category_id,
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c.title as category_title,
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c.hide_globally as category_hidden,
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fi.icon_id,
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u.timezone
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FROM
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feeds f
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LEFT JOIN
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categories c ON c.id=f.category_id
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LEFT JOIN
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feed_icons fi ON fi.feed_id=f.id
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LEFT JOIN
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users u ON u.id=f.user_id
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WHERE %s
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%s
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`
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query = fmt.Sprintf(query, f.buildCondition(), f.buildSorting())
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rows, err := f.store.db.Query(query, f.args...)
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if err != nil {
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return nil, fmt.Errorf(`store: unable to fetch feeds: %w`, err)
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}
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defer rows.Close()
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readCounters, unreadCounters, err := f.fetchFeedCounter()
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if err != nil {
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return nil, err
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}
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feeds := make(model.Feeds, 0)
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for rows.Next() {
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var feed model.Feed
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var iconID sql.NullInt64
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var tz string
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feed.Category = &model.Category{}
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err := rows.Scan(
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&feed.ID,
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&feed.FeedURL,
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&feed.SiteURL,
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&feed.Title,
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&feed.EtagHeader,
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&feed.LastModifiedHeader,
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&feed.UserID,
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&feed.CheckedAt,
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&feed.ParsingErrorCount,
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&feed.ParsingErrorMsg,
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&feed.ScraperRules,
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&feed.RewriteRules,
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&feed.BlocklistRules,
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&feed.KeeplistRules,
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&feed.UrlRewriteRules,
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&feed.Crawler,
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&feed.UserAgent,
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&feed.Cookie,
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&feed.Username,
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&feed.Password,
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&feed.IgnoreHTTPCache,
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&feed.AllowSelfSignedCertificates,
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&feed.FetchViaProxy,
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&feed.Disabled,
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&feed.NoMediaPlayer,
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&feed.HideGlobally,
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&feed.Category.ID,
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&feed.Category.Title,
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&feed.Category.HideGlobally,
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&iconID,
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&tz,
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)
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if err != nil {
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return nil, fmt.Errorf(`store: unable to fetch feeds row: %w`, err)
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}
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if iconID.Valid {
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feed.Icon = &model.FeedIcon{FeedID: feed.ID, IconID: iconID.Int64}
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} else {
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feed.Icon = &model.FeedIcon{FeedID: feed.ID, IconID: 0}
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}
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if readCounters != nil {
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if count, found := readCounters[feed.ID]; found {
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feed.ReadCount = count
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}
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}
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if unreadCounters != nil {
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if count, found := unreadCounters[feed.ID]; found {
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feed.UnreadCount = count
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}
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}
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feed.CheckedAt = timezone.Convert(tz, feed.CheckedAt)
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feed.Category.UserID = feed.UserID
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feeds = append(feeds, &feed)
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}
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return feeds, nil
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}
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func (f *FeedQueryBuilder) fetchFeedCounter() (unreadCounters map[int64]int, readCounters map[int64]int, err error) {
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if !f.withCounters {
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return nil, nil, nil
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}
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query := `
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SELECT
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e.feed_id,
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e.status,
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count(*)
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FROM
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entries e
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%s
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WHERE
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%s
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GROUP BY
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e.feed_id, e.status
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`
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join := ""
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if f.counterJoinFeeds {
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join = "LEFT JOIN feeds f ON f.id=e.feed_id"
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}
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query = fmt.Sprintf(query, join, f.buildCounterCondition())
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rows, err := f.store.db.Query(query, f.counterArgs...)
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if err != nil {
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return nil, nil, fmt.Errorf(`store: unable to fetch feed counts: %w`, err)
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}
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defer rows.Close()
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readCounters = make(map[int64]int)
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unreadCounters = make(map[int64]int)
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for rows.Next() {
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var feedID int64
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var status string
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var count int
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if err := rows.Scan(&feedID, &status, &count); err != nil {
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return nil, nil, fmt.Errorf(`store: unable to fetch feed counter row: %w`, err)
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}
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if status == model.EntryStatusRead {
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readCounters[feedID] = count
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} else if status == model.EntryStatusUnread {
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unreadCounters[feedID] = count
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}
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}
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return readCounters, unreadCounters, nil
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}
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