393 lines
10 KiB
Go
393 lines
10 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 // import "miniflux.app/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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"miniflux.app/model"
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"miniflux.app/timezone"
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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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args []interface{}
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conditions []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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}
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// WithSearchQuery adds full-text search query to the condition.
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func (e *EntryQueryBuilder) WithSearchQuery(query string) *EntryQueryBuilder {
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if query != "" {
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nArgs := len(e.args) + 1
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e.conditions = append(e.conditions, fmt.Sprintf("e.document_vectors @@ plainto_tsquery($%d)", nArgs))
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e.args = append(e.args, query)
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// 0.0000001 = 0.1 / (seconds_in_a_day)
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e.WithOrder(fmt.Sprintf("ts_rank(document_vectors, plainto_tsquery($%d)) - extract (epoch from now() - published_at)::float * 0.0000001", nArgs))
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e.WithDirection("DESC")
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}
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return e
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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.conditions = append(e.conditions, "e.starred is true")
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return e
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}
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// BeforeDate adds a condition < published_at
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func (e *EntryQueryBuilder) BeforeDate(date time.Time) *EntryQueryBuilder {
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e.conditions = append(e.conditions, fmt.Sprintf("e.published_at < $%d", len(e.args)+1))
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e.args = append(e.args, date)
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return e
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}
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// AfterDate adds a condition > published_at
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func (e *EntryQueryBuilder) AfterDate(date time.Time) *EntryQueryBuilder {
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e.conditions = append(e.conditions, fmt.Sprintf("e.published_at > $%d", len(e.args)+1))
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e.args = append(e.args, date)
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return e
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}
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// BeforeEntryID adds a condition < entryID.
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func (e *EntryQueryBuilder) BeforeEntryID(entryID int64) *EntryQueryBuilder {
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if entryID != 0 {
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e.conditions = append(e.conditions, fmt.Sprintf("e.id < $%d", len(e.args)+1))
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e.args = append(e.args, entryID)
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}
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return e
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}
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// AfterEntryID adds a condition > entryID.
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func (e *EntryQueryBuilder) AfterEntryID(entryID int64) *EntryQueryBuilder {
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if entryID != 0 {
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e.conditions = append(e.conditions, fmt.Sprintf("e.id > $%d", len(e.args)+1))
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e.args = append(e.args, entryID)
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}
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return e
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}
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// WithEntryIDs filter by entry IDs.
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func (e *EntryQueryBuilder) WithEntryIDs(entryIDs []int64) *EntryQueryBuilder {
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e.conditions = append(e.conditions, fmt.Sprintf("e.id = ANY($%d)", len(e.args)+1))
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e.args = append(e.args, pq.Int64Array(entryIDs))
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return e
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}
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// WithEntryID filter by entry ID.
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func (e *EntryQueryBuilder) WithEntryID(entryID int64) *EntryQueryBuilder {
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if entryID != 0 {
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e.conditions = append(e.conditions, fmt.Sprintf("e.id = $%d", len(e.args)+1))
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e.args = append(e.args, entryID)
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}
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return e
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}
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// WithFeedID filter by feed ID.
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func (e *EntryQueryBuilder) WithFeedID(feedID int64) *EntryQueryBuilder {
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if feedID > 0 {
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e.conditions = append(e.conditions, fmt.Sprintf("e.feed_id = $%d", len(e.args)+1))
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e.args = append(e.args, feedID)
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}
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return e
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}
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// WithCategoryID filter by category ID.
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func (e *EntryQueryBuilder) WithCategoryID(categoryID int64) *EntryQueryBuilder {
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if categoryID > 0 {
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e.conditions = append(e.conditions, fmt.Sprintf("f.category_id = $%d", len(e.args)+1))
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e.args = append(e.args, categoryID)
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}
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return e
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}
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// WithStatus filter by entry status.
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func (e *EntryQueryBuilder) WithStatus(status string) *EntryQueryBuilder {
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if status != "" {
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e.conditions = append(e.conditions, fmt.Sprintf("e.status = $%d", len(e.args)+1))
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e.args = append(e.args, status)
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}
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return e
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}
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// WithStatuses filter by a list of entry statuses.
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func (e *EntryQueryBuilder) WithStatuses(statuses []string) *EntryQueryBuilder {
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if len(statuses) > 0 {
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e.conditions = append(e.conditions, fmt.Sprintf("e.status = ANY($%d)", len(e.args)+1))
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e.args = append(e.args, pq.StringArray(statuses))
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}
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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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if status != "" {
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e.conditions = append(e.conditions, fmt.Sprintf("e.status <> $%d", len(e.args)+1))
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e.args = append(e.args, status)
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}
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return e
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}
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// WithShareCode set the entry share code.
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func (e *EntryQueryBuilder) WithShareCode(shareCode string) *EntryQueryBuilder {
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e.conditions = append(e.conditions, fmt.Sprintf("e.share_code = $%d", len(e.args)+1))
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e.args = append(e.args, shareCode)
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return e
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}
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// WithShareCodeNotEmpty adds a filter for non-empty share code.
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func (e *EntryQueryBuilder) WithShareCodeNotEmpty() *EntryQueryBuilder {
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e.conditions = append(e.conditions, "e.share_code <> ''")
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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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query := `SELECT count(*) FROM entries e LEFT JOIN feeds f ON f.id=e.feed_id WHERE %s`
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condition := e.buildCondition()
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err = e.store.db.QueryRow(fmt.Sprintf(query, condition), e.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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query := `
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SELECT
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e.id,
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e.user_id,
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e.feed_id,
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e.hash,
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e.published_at at time zone u.timezone,
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e.title,
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e.url,
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e.comments_url,
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e.author,
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e.share_code,
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e.content,
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e.status,
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e.starred,
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f.title as feed_title,
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f.feed_url,
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f.site_url,
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f.checked_at,
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f.category_id, c.title as category_title,
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f.scraper_rules,
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f.rewrite_rules,
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f.crawler,
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f.user_agent,
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fi.icon_id,
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u.timezone
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FROM
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entries e
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LEFT JOIN
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feeds f ON f.id=e.feed_id
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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=e.user_id
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WHERE %s %s
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`
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condition := e.buildCondition()
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sorting := e.buildSorting()
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query = fmt.Sprintf(query, condition, sorting)
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rows, err := e.store.db.Query(query, e.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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var tz string
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entry.Feed = &model.Feed{}
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entry.Feed.Category = &model.Category{}
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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.CommentsURL,
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&entry.Author,
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&entry.ShareCode,
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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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&entry.Feed.UserAgent,
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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("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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// Make sure that timestamp fields contains timezone information (API)
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entry.Date = timezone.Convert(tz, entry.Date)
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entry.Feed.CheckedAt = timezone.Convert(tz, entry.Feed.CheckedAt)
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entry.Feed.ID = entry.FeedID
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entry.Feed.UserID = entry.UserID
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entry.Feed.Icon.FeedID = entry.FeedID
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entry.Feed.Category.UserID = entry.UserID
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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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query := `SELECT e.id FROM entries e LEFT JOIN feeds f ON f.id=e.feed_id WHERE %s %s`
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condition := e.buildCondition()
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query = fmt.Sprintf(query, condition, e.buildSorting())
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rows, err := e.store.db.Query(query, e.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() string {
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return strings.Join(e.conditions, " AND ")
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}
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func (e *EntryQueryBuilder) buildSorting() string {
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var parts []string
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if e.order != "" {
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parts = append(parts, fmt.Sprintf(`ORDER BY %s`, e.order))
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}
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if e.direction != "" {
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parts = append(parts, fmt.Sprintf(`%s`, e.direction))
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}
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if e.limit != 0 {
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parts = append(parts, fmt.Sprintf(`LIMIT %d`, e.limit))
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}
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if e.offset != 0 {
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parts = append(parts, fmt.Sprintf(`OFFSET %d`, e.offset))
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}
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return strings.Join(parts, " ")
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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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args: []interface{}{userID},
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conditions: []string{"e.user_id = $1"},
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}
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}
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// NewAnonymousQueryBuilder returns a new EntryQueryBuilder suitable for anonymous users.
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func NewAnonymousQueryBuilder(store *Storage) *EntryQueryBuilder {
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return &EntryQueryBuilder{
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store: store,
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}
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}
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