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miniflux/storage/entry_query_builder.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.
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package storage // import "miniflux.app/storage"
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import (
"fmt"
"strings"
"time"
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"github.com/lib/pq"
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"miniflux.app/model"
"miniflux.app/timezone"
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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
args []interface{}
conditions []string
order string
direction string
limit int
offset int
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}
// WithSearchQuery adds full-text search query to the condition.
func (e *EntryQueryBuilder) WithSearchQuery(query string) *EntryQueryBuilder {
if query != "" {
nArgs := len(e.args) + 1
e.conditions = append(e.conditions, fmt.Sprintf("e.document_vectors @@ plainto_tsquery($%d)", nArgs))
e.args = append(e.args, query)
e.WithOrder(fmt.Sprintf("ts_rank(document_vectors, plainto_tsquery($%d))", nArgs))
e.WithDirection("DESC")
}
return e
}
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// WithStarred adds starred filter.
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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}
// BeforeDate adds a condition < published_at
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))
e.args = append(e.args, date)
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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 {
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if entryID != 0 {
e.conditions = append(e.conditions, fmt.Sprintf("e.id > $%d", len(e.args)+1))
e.args = append(e.args, entryID)
}
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return e
}
// WithEntryIDs adds a condition to fetch only the given entry IDs.
func (e *EntryQueryBuilder) WithEntryIDs(entryIDs []int64) *EntryQueryBuilder {
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e.conditions = append(e.conditions, fmt.Sprintf("e.id = ANY($%d)", len(e.args)+1))
e.args = append(e.args, pq.Array(entryIDs))
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return e
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}
// WithEntryID set the entryID.
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func (e *EntryQueryBuilder) WithEntryID(entryID int64) *EntryQueryBuilder {
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if entryID != 0 {
e.conditions = append(e.conditions, fmt.Sprintf("e.id = $%d", len(e.args)+1))
e.args = append(e.args, entryID)
}
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return e
}
// WithFeedID set the feedID.
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func (e *EntryQueryBuilder) WithFeedID(feedID int64) *EntryQueryBuilder {
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if feedID != 0 {
e.conditions = append(e.conditions, fmt.Sprintf("e.feed_id = $%d", len(e.args)+1))
e.args = append(e.args, feedID)
}
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return e
}
// WithCategoryID set the categoryID.
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func (e *EntryQueryBuilder) WithCategoryID(categoryID int64) *EntryQueryBuilder {
if categoryID > 0 {
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e.conditions = append(e.conditions, fmt.Sprintf("f.category_id = $%d", len(e.args)+1))
e.args = append(e.args, categoryID)
}
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return e
}
// WithStatus set the entry status.
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func (e *EntryQueryBuilder) WithStatus(status string) *EntryQueryBuilder {
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if status != "" {
e.conditions = append(e.conditions, fmt.Sprintf("e.status = $%d", len(e.args)+1))
e.args = append(e.args, status)
}
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return e
}
// WithoutStatus set the entry status that should not be returned.
func (e *EntryQueryBuilder) WithoutStatus(status string) *EntryQueryBuilder {
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if status != "" {
e.conditions = append(e.conditions, fmt.Sprintf("e.status <> $%d", len(e.args)+1))
e.args = append(e.args, status)
}
return e
}
// WithShareCode set the entry share code.
func (e *EntryQueryBuilder) WithShareCode(shareCode string) *EntryQueryBuilder {
e.conditions = append(e.conditions, fmt.Sprintf("e.share_code = $%d", len(e.args)+1))
e.args = append(e.args, shareCode)
return e
}
// WithShareCodeNotEmpty adds a filter for non-empty share code.
func (e *EntryQueryBuilder) WithShareCodeNotEmpty() *EntryQueryBuilder {
e.conditions = append(e.conditions, "e.share_code <> ''")
return e
}
// WithOrder set the sorting order.
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func (e *EntryQueryBuilder) WithOrder(order string) *EntryQueryBuilder {
e.order = order
return e
}
// WithDirection set the sorting direction.
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func (e *EntryQueryBuilder) WithDirection(direction string) *EntryQueryBuilder {
e.direction = direction
return e
}
// WithLimit set the limit.
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func (e *EntryQueryBuilder) WithLimit(limit int) *EntryQueryBuilder {
e.limit = limit
return e
}
// WithOffset set the offset.
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func (e *EntryQueryBuilder) WithOffset(offset int) *EntryQueryBuilder {
e.offset = offset
return e
}
// CountEntries count the number of entries that match the condition.
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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`
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condition := e.buildCondition()
err = e.store.db.QueryRow(fmt.Sprintf(query, condition), e.args...).Scan(&count)
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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.
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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.
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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.share_code,
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
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WHERE %s %s
`
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condition := e.buildCondition()
sorting := e.buildSorting()
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 {
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
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entry.Feed = &model.Feed{}
entry.Feed.Category = &model.Category{}
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entry.Feed.Icon = &model.FeedIcon{}
err := rows.Scan(
&entry.ID,
&entry.UserID,
&entry.FeedID,
&entry.Hash,
&entry.Date,
&entry.Title,
&entry.URL,
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&entry.CommentsURL,
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&entry.Author,
&entry.ShareCode,
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&entry.Content,
&entry.Status,
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&entry.Starred,
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&entry.Feed.Title,
&entry.Feed.FeedURL,
&entry.Feed.SiteURL,
&entry.Feed.CheckedAt,
&entry.Feed.Category.ID,
&entry.Feed.Category.Title,
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&entry.Feed.ScraperRules,
&entry.Feed.RewriteRules,
&entry.Feed.Crawler,
&entry.Feed.UserAgent,
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&iconID,
&tz,
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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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}
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)
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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)
}
return entries, nil
}
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// GetEntryIDs returns a list of entry IDs that match the condition.
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()
query = fmt.Sprintf(query, condition, e.buildSorting())
rows, err := e.store.db.Query(query, e.args...)
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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
}
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func (e *EntryQueryBuilder) buildCondition() string {
return strings.Join(e.conditions, " AND ")
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}
func (e *EntryQueryBuilder) buildSorting() string {
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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}
if e.direction != "" {
parts = append(parts, fmt.Sprintf(`%s`, e.direction))
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}
if e.limit != 0 {
parts = append(parts, fmt.Sprintf(`LIMIT %d`, e.limit))
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}
if e.offset != 0 {
parts = append(parts, fmt.Sprintf(`OFFSET %d`, e.offset))
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}
return strings.Join(parts, " ")
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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,
args: []interface{}{userID},
conditions: []string{"e.user_id = $1"},
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}
}
// NewAnonymousQueryBuilder returns a new EntryQueryBuilder suitable for anonymous users.
func NewAnonymousQueryBuilder(store *Storage) *EntryQueryBuilder {
return &EntryQueryBuilder{
store: store,
}
}