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miniflux/storage/entry_query_builder.go
2019-11-17 23:05:22 -08:00

338 lines
8.9 KiB
Go

// 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 (
"fmt"
"strings"
"time"
"github.com/lib/pq"
"miniflux.app/model"
"miniflux.app/timezone"
)
// EntryQueryBuilder builds a SQL query to fetch entries.
type EntryQueryBuilder struct {
store *Storage
args []interface{}
conditions []string
order string
direction string
limit int
offset int
}
// WithSearchQuery adds full-text search query to the condition.
func (e *EntryQueryBuilder) WithSearchQuery(query string) *EntryQueryBuilder {
if query != "" {
e.conditions = append(e.conditions, fmt.Sprintf("e.document_vectors @@ plainto_tsquery($%d)", len(e.args)+1))
e.args = append(e.args, query)
}
// ordered by relevance, can be overrode
e.WithOrder(fmt.Sprintf("ts_rank(document_vectors, plainto_tsquery('%s'))", query))
e.WithDirection("DESC")
return e
}
// WithStarred adds starred filter.
func (e *EntryQueryBuilder) WithStarred() *EntryQueryBuilder {
e.conditions = append(e.conditions, "e.starred is true")
return e
}
// BeforeDate adds a condition < published_at
func (e *EntryQueryBuilder) BeforeDate(date time.Time) *EntryQueryBuilder {
e.conditions = append(e.conditions, fmt.Sprintf("e.published_at < $%d", len(e.args)+1))
e.args = append(e.args, date)
return e
}
// AfterDate adds a condition > published_at
func (e *EntryQueryBuilder) AfterDate(date time.Time) *EntryQueryBuilder {
e.conditions = append(e.conditions, fmt.Sprintf("e.published_at > $%d", len(e.args)+1))
e.args = append(e.args, date)
return e
}
// BeforeEntryID adds a condition < entryID.
func (e *EntryQueryBuilder) BeforeEntryID(entryID int64) *EntryQueryBuilder {
if entryID != 0 {
e.conditions = append(e.conditions, fmt.Sprintf("e.id < $%d", len(e.args)+1))
e.args = append(e.args, entryID)
}
return e
}
// AfterEntryID adds a condition > entryID.
func (e *EntryQueryBuilder) AfterEntryID(entryID int64) *EntryQueryBuilder {
if entryID != 0 {
e.conditions = append(e.conditions, fmt.Sprintf("e.id > $%d", len(e.args)+1))
e.args = append(e.args, entryID)
}
return e
}
// WithEntryIDs adds a condition to fetch only the given entry IDs.
func (e *EntryQueryBuilder) WithEntryIDs(entryIDs []int64) *EntryQueryBuilder {
e.conditions = append(e.conditions, fmt.Sprintf("e.id = ANY($%d)", len(e.args)+1))
e.args = append(e.args, pq.Array(entryIDs))
return e
}
// WithEntryID set the entryID.
func (e *EntryQueryBuilder) WithEntryID(entryID int64) *EntryQueryBuilder {
if entryID != 0 {
e.conditions = append(e.conditions, fmt.Sprintf("e.id = $%d", len(e.args)+1))
e.args = append(e.args, entryID)
}
return e
}
// WithFeedID set the feedID.
func (e *EntryQueryBuilder) WithFeedID(feedID int64) *EntryQueryBuilder {
if feedID != 0 {
e.conditions = append(e.conditions, fmt.Sprintf("e.feed_id = $%d", len(e.args)+1))
e.args = append(e.args, feedID)
}
return e
}
// WithCategoryID set the categoryID.
func (e *EntryQueryBuilder) WithCategoryID(categoryID int64) *EntryQueryBuilder {
if categoryID > 0 {
e.conditions = append(e.conditions, fmt.Sprintf("f.category_id = $%d", len(e.args)+1))
e.args = append(e.args, categoryID)
}
return e
}
// WithStatus set the entry status.
func (e *EntryQueryBuilder) WithStatus(status string) *EntryQueryBuilder {
if status != "" {
e.conditions = append(e.conditions, fmt.Sprintf("e.status = $%d", len(e.args)+1))
e.args = append(e.args, status)
}
return e
}
// WithoutStatus set the entry status that should not be returned.
func (e *EntryQueryBuilder) WithoutStatus(status string) *EntryQueryBuilder {
if status != "" {
e.conditions = append(e.conditions, fmt.Sprintf("e.status <> $%d", len(e.args)+1))
e.args = append(e.args, status)
}
return e
}
// WithOrder set the sorting order.
func (e *EntryQueryBuilder) WithOrder(order string) *EntryQueryBuilder {
e.order = order
return e
}
// WithDirection set the sorting direction.
func (e *EntryQueryBuilder) WithDirection(direction string) *EntryQueryBuilder {
e.direction = direction
return e
}
// WithLimit set the limit.
func (e *EntryQueryBuilder) WithLimit(limit int) *EntryQueryBuilder {
e.limit = limit
return e
}
// WithOffset set the offset.
func (e *EntryQueryBuilder) WithOffset(offset int) *EntryQueryBuilder {
e.offset = offset
return e
}
// CountEntries count the number of entries that match the condition.
func (e *EntryQueryBuilder) CountEntries() (count int, err error) {
query := `SELECT count(*) FROM entries e LEFT JOIN feeds f ON f.id=e.feed_id WHERE %s`
condition := e.buildCondition()
err = e.store.db.QueryRow(fmt.Sprintf(query, condition), e.args...).Scan(&count)
if err != nil {
return 0, fmt.Errorf("unable to count entries: %v", err)
}
return count, nil
}
// GetEntry returns a single entry that match the condition.
func (e *EntryQueryBuilder) GetEntry() (*model.Entry, error) {
e.limit = 1
entries, err := e.GetEntries()
if err != nil {
return nil, err
}
if len(entries) != 1 {
return nil, nil
}
entries[0].Enclosures, err = e.store.GetEnclosures(entries[0].ID)
if err != nil {
return nil, err
}
return entries[0], nil
}
// GetEntries returns a list of entries that match the condition.
func (e *EntryQueryBuilder) GetEntries() (model.Entries, error) {
query := `
SELECT
e.id, e.user_id, e.feed_id, e.hash, e.published_at at time zone u.timezone, e.title,
e.url, e.comments_url, e.author, e.content, e.status, e.starred,
f.title as feed_title, f.feed_url, f.site_url, f.checked_at,
f.category_id, c.title as category_title, f.scraper_rules, f.rewrite_rules, f.crawler, f.user_agent,
fi.icon_id,
u.timezone
FROM entries e
LEFT JOIN feeds f ON f.id=e.feed_id
LEFT JOIN categories c ON c.id=f.category_id
LEFT JOIN feed_icons fi ON fi.feed_id=f.id
LEFT JOIN users u ON u.id=e.user_id
WHERE %s %s
`
condition := e.buildCondition()
sorting := e.buildSorting()
query = fmt.Sprintf(query, condition, sorting)
rows, err := e.store.db.Query(query, e.args...)
if err != nil {
return nil, fmt.Errorf("unable to get entries: %v", err)
}
defer rows.Close()
entries := make(model.Entries, 0)
for rows.Next() {
var entry model.Entry
var iconID interface{}
var tz string
entry.Feed = &model.Feed{}
entry.Feed.Category = &model.Category{}
entry.Feed.Icon = &model.FeedIcon{}
err := rows.Scan(
&entry.ID,
&entry.UserID,
&entry.FeedID,
&entry.Hash,
&entry.Date,
&entry.Title,
&entry.URL,
&entry.CommentsURL,
&entry.Author,
&entry.Content,
&entry.Status,
&entry.Starred,
&entry.Feed.Title,
&entry.Feed.FeedURL,
&entry.Feed.SiteURL,
&entry.Feed.CheckedAt,
&entry.Feed.Category.ID,
&entry.Feed.Category.Title,
&entry.Feed.ScraperRules,
&entry.Feed.RewriteRules,
&entry.Feed.Crawler,
&entry.Feed.UserAgent,
&iconID,
&tz,
)
if err != nil {
return nil, fmt.Errorf("unable to fetch entry row: %v", err)
}
if iconID == nil {
entry.Feed.Icon.IconID = 0
} else {
entry.Feed.Icon.IconID = iconID.(int64)
}
// Make sure that timestamp fields contains timezone information (API)
entry.Date = timezone.Convert(tz, entry.Date)
entry.Feed.CheckedAt = timezone.Convert(tz, entry.Feed.CheckedAt)
entry.Feed.ID = entry.FeedID
entry.Feed.UserID = entry.UserID
entry.Feed.Icon.FeedID = entry.FeedID
entry.Feed.Category.UserID = entry.UserID
entries = append(entries, &entry)
}
return entries, nil
}
// GetEntryIDs returns a list of entry IDs that match the condition.
func (e *EntryQueryBuilder) GetEntryIDs() ([]int64, error) {
query := `SELECT e.id FROM entries e LEFT JOIN feeds f ON f.id=e.feed_id WHERE %s %s`
condition := e.buildCondition()
query = fmt.Sprintf(query, condition, e.buildSorting())
rows, err := e.store.db.Query(query, e.args...)
if err != nil {
return nil, fmt.Errorf("unable to get entries: %v", err)
}
defer rows.Close()
var entryIDs []int64
for rows.Next() {
var entryID int64
err := rows.Scan(&entryID)
if err != nil {
return nil, fmt.Errorf("unable to fetch entry row: %v", err)
}
entryIDs = append(entryIDs, entryID)
}
return entryIDs, nil
}
func (e *EntryQueryBuilder) buildCondition() string {
return strings.Join(e.conditions, " AND ")
}
func (e *EntryQueryBuilder) buildSorting() string {
var parts []string
if e.order != "" {
parts = append(parts, fmt.Sprintf(`ORDER BY %s`, e.order))
}
if e.direction != "" {
parts = append(parts, fmt.Sprintf(`%s`, e.direction))
}
if e.limit != 0 {
parts = append(parts, fmt.Sprintf(`LIMIT %d`, e.limit))
}
if e.offset != 0 {
parts = append(parts, fmt.Sprintf(`OFFSET %d`, e.offset))
}
return strings.Join(parts, " ")
}
// NewEntryQueryBuilder returns a new EntryQueryBuilder.
func NewEntryQueryBuilder(store *Storage, userID int64) *EntryQueryBuilder {
return &EntryQueryBuilder{
store: store,
args: []interface{}{userID},
conditions: []string{"e.user_id = $1"},
}
}