1 files changed, 89 insertions, 0 deletions
diff --git a/src/Index/Connection.go b/src/Index/Connection.go
new file mode 100644
index 0000000..d4523b2
--- /dev/null
+++ b/src/Index/Connection.go
@@ -0,0 +1,89 @@
+package index
+
+import (
+	"database/sql"
+	"fmt"
+	"log/slog"
+	_ "github.com/mattn/go-sqlite3"
+
+	settings "physick.ru/Settings"
+)
+
+var db *sql.DB = nil
+
+type Article struct {
+	Id int
+    DisplayName string
+    FileName string
+    URL string
+
+	Tags []Tag
+}
+
+type Tag struct {
+	Id int
+    Name string
+}
+
+func EstablistDBConnection() {
+	var database, err = sql.Open("sqlite3", settings.Current.IndexDB)
+	if err != nil {
+		panic(fmt.Sprintf("Failed to start a server: DB connection failed (%s)", err.Error()))
+	}
+	db = database
+}
+
+func GetAllArticles() ([]Article, error) {
+	var rows, sqlErr = db.Query("SELECT Id, DisplayName, FileName, URL FROM Articles;")
+	if sqlErr != nil {
+		return []Article{}, sqlErr
+	}
+	var outp = make([]Article, 0)
+	for rows.Next() {
+		var new  = Article{}
+		rows.Scan(&new.Id, &new.DisplayName, &new.FileName, &new.URL)
+		var tagsErr = new.FillTags()
+		if tagsErr != nil {
+			slog.Warn("Failed to parse article flags", slog.Any("Error", tagsErr))
+		}
+		outp = append(outp, new)
+	}
+	return outp, nil
+}
+
+func (base *Article) FillTags() error {
+	var rows, sqlErr = db.Query(`SELECT Tags.Id, Tags.Name 
+		FROM ArticlesToTags LEFT JOIN Tags ON Tags.Id = ArticlesToTags.TagId 
+		WHERE ArticlesToTags.ArticleId = ?;`, base.Id)
+	if sqlErr != nil {
+		return sqlErr
+	}
+	var outp = make([]Tag, 0)
+	for rows.Next() {
+		var new  = Tag{}
+		var err = rows.Scan(&new.Id, &new.Name)
+		if err != nil {
+			slog.Warn("Failed to parse a tag descriptor from the table", slog.Any("Error", err))
+		}
+		outp = append(outp, new)
+	}
+	base.Tags = outp
+	return nil
+}
+
+func GetArticleByName(URL string) (Article, error) {
+	var rows, sqlErr = db.Query("SELECT Id, DisplayName, FileName, URL FROM Articles WHERE URL = ?;", URL)
+	if sqlErr != nil {
+		return Article{}, sqlErr
+	}
+	var new  = Article{}
+	for rows.Next() {
+		rows.Scan(&new.Id, &new.DisplayName, &new.FileName, &new.URL)
+		var tagsErr = new.FillTags()
+		if tagsErr != nil {
+			slog.Error("Failed to parse article flags", slog.Any("Error", tagsErr))
+		}
+	}
+	return new, nil
+
+}