basic storage package

.gitignore

@@ -0,0 +1 @@
+yarr

build.sh

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+#!/bin/sh
+
+CGO_ENABLED=1 go build -tags sqlite_foreign_keys

go.mod

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+module github.com/nkanaev/yarr
+
+go 1.14
+
+require github.com/mattn/go-sqlite3 v1.14.0

go.sum

@@ -0,0 +1,11 @@
+github.com/PuerkitoBio/goquery v1.5.1/go.mod h1:GsLWisAFVj4WgDibEWF4pvYnkVQBpKBKeU+7zCJoLcc=
+github.com/andybalholm/cascadia v1.1.0/go.mod h1:GsXiBklL0woXo1j/WYWtSYYC4ouU9PqHO0sqidkEA4Y=
+github.com/mattn/go-sqlite3 v1.14.0 h1:mLyGNKR8+Vv9CAU7PphKa2hkEqxxhn8i32J6FPj1/QA=
+github.com/mattn/go-sqlite3 v1.14.0/go.mod h1:JIl7NbARA7phWnGvh0LKTyg7S9BA+6gx71ShQilpsus=
+golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
+golang.org/x/net v0.0.0-20180218175443-cbe0f9307d01/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
+golang.org/x/net v0.0.0-20200202094626-16171245cfb2/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
+golang.org/x/net v0.0.0-20200324143707-d3edc9973b7e/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A=
+golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20200323222414-85ca7c5b95cd/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=

main.go

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+package main
+
+import (
+	"github.com/nkanaev/yarr/storage"
+	"log"
+)
+
+func main() {
+	storage, err := storage.New()
+	if err != nil {
+		log.Fatal(err)
+	}
+	/*
+	folder := storage.CreateFolder("foo")
+	storage.RenameFolder(folder.Id, "bar")
+	storage.ToggleFolderExpanded(folder.Id, false)
+	*/
+}

storage/folder.go

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+package storage
+
+import "fmt"
+
+type Folder struct {
+	Id int64
+	Title string
+	IsExpanded bool
+}
+
+func (s *Storage) CreateFolder(title string) *Folder {
+	expanded := true
+	result, err := s.db.Exec(`
+		insert into folders (title, is_expanded) values (?, ?)`,
+		title, expanded,
+	)
+	if err != nil {
+		fmt.Println(err)
+		return nil
+	}
+	id, idErr := result.LastInsertId()
+	if idErr != nil {
+		return nil
+	}
+	return &Folder{Id: id, Title: title, IsExpanded: expanded}
+}
+
+func (s *Storage) DeleteFolder(folderId int64) bool {
+	_, err1 := s.db.Exec(`update feeds set folder_id = null where folder_id = ?`, folderId)
+	_, err2 := s.db.Exec(`delete from folders where id = ?`, folderId)
+	return err1 == nil && err2 == nil
+}
+
+func (s *Storage) RenameFolder(folderId int64, newTitle string) bool {
+	_, err := s.db.Exec(`update folders set title = ? where id = ?`, newTitle, folderId)
+	return err == nil
+}
+
+func (s *Storage) ToggleFolderExpanded(folderId int64, isExpanded bool) bool {
+	_, err := s.db.Exec(`update folders set is_expanded = ? where id = ?`, isExpanded, folderId)
+	return err == nil
+}

storage/storage.go

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+package storage
+
+import (
+	"database/sql"
+	_ "github.com/mattn/go-sqlite3"
+)
+
+var initQuery string = `
+create table if not exists folders (
+ id             integer primary key autoincrement,
+ title          text not null,
+ is_expanded    boolean
+);
+
+create table if not exists feeds (
+ id             integer primary key autoincrement,
+ folder_id      references folders(id),
+ title          text not null,
+ description    text,
+ link           text,
+ feed_link      text,
+ icon           text
+);
+
+create index if not exists idx_feed_folder_id on feeds(folder_id);
+
+create table if not exists items (
+ id             string primary key,
+ feed_id        references feeds(id),
+ title          text,
+ link           text,
+ description    text,
+ content        text,
+ author         text,
+ date           integer,
+ date_updated   integer,
+ status         integer,
+ image          text
+);
+
+create index if not exists idx_item_feed_id on items(feed_id);
+create index if not exists idx_item_status  on items(status);
+`
+
+type Storage struct {
+	db *sql.DB
+}
+
+func New() (*Storage, error) {
+	path := "./storage.db"
+	db, err := sql.Open("sqlite3", path)
+	if err != nil {
+		return nil, err
+	}
+	_, err = db.Exec(initQuery)
+	if err != nil {
+		return nil, err
+	}
+	return &Storage{db: db}, nil
+}