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extend blog articles endpoint to allow to query for tags

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Signed-off-by: Tobias Erbshäußer <tobias@tesoft.dev>
This commit is contained in:
Tobias Erbshäußer
2026-05-24 09:22:52 +02:00
parent 996a538704
commit df6f9d692b
2 changed files with 54 additions and 20 deletions
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backend/db.go
+43 -18
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@@ -8,6 +8,7 @@ import (
"log"
"slices"
"strconv"
"strings"
"time"
_ "github.com/mattn/go-sqlite3"
@@ -134,29 +135,53 @@ func (db *Database) CreateBlogArticle() (int64, func(*Article) error, error) {
}, err
}
func (db *Database) GetBlogArticles(showAll bool, offset int, limit int) ([]ArticleProperties, error) {
inner := "SELECT id FROM blog_article"
func (db *Database) GetBlogArticles(showAll bool, offset int, limit int, tags []string) ([]ArticleProperties, int64, error) {
filters := make([]string, 0)
filterArgs := make([]interface{}, 0)
if !showAll {
inner = inner + " WHERE status = " + strconv.Itoa(ArticleStatusPublished)
filters = append(filters, "blog_article.status = ?")
filterArgs = append(filterArgs, ArticleStatusPublished)
}
inner = inner + " ORDER BY date DESC LIMIT ? OFFSET ?"
outer := "SELECT blog_article.id, blog_article.status, blog_article.title, blog_article.date, blog_article.modification_date, blog_tag.name" +
" FROM blog_article" +
" LEFT JOIN blog_article_to_tag ON blog_article.id = blog_article_to_tag.article_id" +
" LEFT JOIN blog_tag ON blog_article_to_tag.tag_id = blog_tag.id" +
" WHERE blog_article.id IN (" + inner + ")" +
" ORDER BY blog_article.date DESC, blog_article.id"
if len(tags) > 0 {
filters = append(filters, "blog_tag.name IN (?"+strings.Repeat(", ?", len(tags)-1)+") GROUP BY blog_article.id HAVING COUNT(DISTINCT blog_tag.id) = ?")
for _, tag := range tags {
filterArgs = append(filterArgs, tag)
}
filterArgs = append(filterArgs, len(tags))
}
filter := ""
if len(filters) > 0 {
filter = " WHERE " + strings.Join(filters, " AND ")
}
joins := " LEFT JOIN blog_article_to_tag ON blog_article.id = blog_article_to_tag.article_id" +
" LEFT JOIN blog_tag ON blog_article_to_tag.tag_id = blog_tag.id"
args := make([]interface{}, 0, len(filterArgs)*2+2)
args = append(args, filterArgs...)
args = append(args, filterArgs...)
args = append(args, limit)
args = append(args, offset)
rows, err := db.db.Query(
outer,
limit,
offset,
"SELECT blog_article.id, blog_article.status, blog_article.title, blog_article.date, blog_article.modification_date, blog_tag.name,"+
" (SELECT COUNT(DISTINCT blog_article.id) FROM blog_article"+joins+filter+")"+
" FROM blog_article"+joins+
" WHERE blog_article.id IN ("+
" SELECT blog_article.id FROM blog_article"+joins+filter+" ORDER BY date DESC LIMIT ? OFFSET ?"+
" )"+
" ORDER BY blog_article.date DESC, blog_article.id",
args...,
)
if err != nil {
return nil, err
return nil, 0, err
}
articles := make([]ArticleProperties, 0)
var total int64
for rows.Next() {
var id int64
var status ArticleStatus
@@ -164,10 +189,10 @@ func (db *Database) GetBlogArticles(showAll bool, offset int, limit int) ([]Arti
var dateStr string
var modificationDateStr *string
var tag *string
err := rows.Scan(&id, &status, &title, &dateStr, &modificationDateStr, &tag)
err := rows.Scan(&id, &status, &title, &dateStr, &modificationDateStr, &tag, &total)
if err != nil {
_ = rows.Close()
return nil, err
return nil, 0, err
}
if tag != nil && len(articles) > 0 && articles[len(articles)-1].Id == id {
@@ -199,10 +224,10 @@ func (db *Database) GetBlogArticles(showAll bool, offset int, limit int) ([]Arti
err = rows.Close()
if err != nil {
return nil, err
return nil, 0, err
}
return articles, nil
return articles, total, nil
}
func (db *Database) GetBlogArticle(showAll bool, id int64) (*Article, error) {