rss and rss item and encode

Former-commit-id: 333b5635cc0eb22964403cc78f660e02a830f077

rss/item.go

@@ -2,21 +2,91 @@ package rss
 
 import (
 	"errors"
+	"fmt"
+	"io/ioutil"
 	"local/rssmon3/config"
+	"net/http"
+	"net/url"
+	"regexp"
+	"strings"
+	"time"
 
 	"github.com/mmcdole/gofeed"
 )
 
+const nsItems = "nsItems"
+
 type Item struct {
-	*config.Encodable
+	Title   string
+	Link    string
+	Content string
+	TS      time.Time
+	FeedKey string
 }
 
-func newItem(i *gofeed.Item, contentFilter string) (*Item, error) {
-	return &Item{
-		Encodable: &config.Encodable{},
-	}, errors.New("not impl")
+func newItem(i *gofeed.Item, contentFilter, feedKey string) (*Item, error) {
+	item := &Item{
+		Title:   i.Title,
+		Link:    i.Link,
+		Content: i.Content,
+		TS:      latestTSPtr(i.UpdatedParsed, i.PublishedParsed),
+		FeedKey: feedKey,
+	}
+
+	if item.Content == "" {
+		item.Content = i.Description
+	}
+	if item.Content == "" {
+		resp, err := http.Get(item.Link)
+		if err != nil {
+			return nil, err
+		}
+		defer resp.Body.Close()
+		b, err := ioutil.ReadAll(resp.Body)
+		if err != nil {
+			return nil, err
+		}
+		item.Content = string(b)
+	}
+	if unescaped, err := url.QueryUnescape(item.Content); err == nil {
+		item.Content = unescaped
+	}
+
+	if contentFilter == "" {
+		contentFilter = ".*"
+	}
+	item.Content = strings.Join(regexp.MustCompile(contentFilter).FindAllString(item.Content, -1), "<br>")
+
+	item.Content = fmt.Sprintf(`<a href="%s">%s</a><br>%s`, item.Link, item.Title, item.Content)
+
+	return item, nil
+}
+
+func (i *Item) Encode() ([]byte, error) {
+	return config.Encode(i)
+}
+
+func (i *Item) Decode(b []byte) error {
+	return config.Decode(b, i)
 }
 
 func (i *Item) save() error {
-	return errors.New("not impl")
+	db := config.Values().DB
+	b, err := i.Encode()
+	if err != nil {
+		return err
+	}
+	return db.Set(i.Link, b, nsItems, i.FeedKey)
+}
+
+func (i *Item) load() error {
+	if i.Link == "" || i.FeedKey == "" {
+		return errors.New("cannot load nil item")
+	}
+	db := config.Values().DB
+	b, err := db.Get(i.Link, nsItems, i.FeedKey)
+	if err != nil {
+		return err
+	}
+	return config.Decode(b, i)
 }