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package item
import (
"adammathes.com/neko/models"
"adammathes.com/neko/vlog"
"encoding/base64"
"fmt"
"github.com/PuerkitoBio/goquery"
"github.com/advancedlogic/GoOse"
"github.com/microcosm-cc/bluemonday"
"github.com/russross/blackfriday"
"log"
"strings"
)
type Item struct {
Id int64 `json:"_id,string,omitempty"`
Title string `json:"title"`
Url string `json:"url"`
Description string `json:"description"`
PublishDate string `json:"publish_date"`
FeedId int64
FeedTitle string `json:"feed_title"`
FeedUrl string `json:"feed_url"`
FeedCategory string `json:"feed_category"`
ReadState bool `json:"read"`
Starred bool `json:"starred"`
FullContent string `json:"full_content"`
HeaderImage string `json:"header_image"`
}
func (i *Item) Print() {
fmt.Printf("id: %d\n", i.Id)
fmt.Printf("title: %s\n", i.Title)
fmt.Printf("ReadState: %d\n", i.ReadState)
}
func (i *Item) Create() error {
res, err := models.DB.Exec(`INSERT INTO
item(title, url, description, publish_date, feed_id)
VALUES(?, ?, ?, ?, ?)`, i.Title, i.Url, i.Description, i.PublishDate, i.FeedId)
if err != nil {
return err
}
id, _ := res.LastInsertId()
i.Id = id
return nil
}
func (i *Item) Save() {
_, err := models.DB.Exec(`UPDATE item
SET read_state=?, starred=?
WHERE id=?`, i.ReadState, i.Starred, i.Id)
if err != nil {
log.Println(err)
}
}
func (i *Item) FullSave() {
_, err := models.DB.Exec(`UPDATE item
SET title=?, url=?, description=?, feed_id=?
WHERE id=?`, i.Title, i.Url, i.Description, i.FeedId, i.Id)
if err != nil {
log.Println(err)
}
}
func filterPolicy() *bluemonday.Policy {
p := bluemonday.NewPolicy()
p.AllowElements("ul", "ol", "li", "blockquote", "a", "img", "p", "h1", "h2", "h3", "h4", "b", "i", "em", "strong", "pre", "code")
p.AllowAttrs("href").OnElements("a")
p.AllowAttrs("src", "alt").OnElements("img")
return p
}
func (i *Item) GetFullContent() {
g := goose.New()
article, err := g.ExtractFromURL(i.Url)
if err != nil {
vlog.Println(err)
return
}
if article.TopNode == nil {
return
}
var md, img string
md = ""
img = ""
md = string(blackfriday.MarkdownCommon([]byte(article.CleanedText)))
ht, err := article.TopNode.Html()
if err != nil {
vlog.Println(err)
return
}
p := filterPolicy()
md = p.Sanitize(ht)
img = article.TopImage
_, err = models.DB.Exec(`UPDATE item
SET full_content=?, header_image=?
WHERE id=?`, md, img, i.Id)
if err != nil {
vlog.Println(err)
}
}
func Filter(max_id int64, feed_id int64, category string, unread_only bool, starred_only bool) ([]*Item, error) {
var args []interface{}
query := `SELECT STRAIGHT_JOIN item.id, item.feed_id, item.title, item.url, item.description,
item.read_state, item.starred, item.publish_date,
item.full_content, item.header_image,
feed.url, feed.title, feed.category
FROM item
INNER JOIN feed ON feed.id=item.feed_id
WHERE item.feed_id=feed.id `
if max_id != 0 {
query = query + "AND item.id < ? "
args = append(args, max_id)
}
if feed_id != 0 {
query = query + " AND feed.id=? "
args = append(args, feed_id)
}
if category != "" {
query = query + " AND feed.category=? "
args = append(args, category)
}
if unread_only {
query = query + " AND item.read_state=0 "
}
if starred_only {
query = query + " AND item.starred=1 "
}
query = query + "ORDER BY item.id DESC LIMIT 15"
// log.Println(query)
// log.Println(args...)
rows, err := models.DB.Query(query, args...)
if err != nil {
log.Println(err)
return nil, err
}
defer rows.Close()
p := filterPolicy()
items := make([]*Item, 0)
for rows.Next() {
i := new(Item)
var feed_id int64
err := rows.Scan(&i.Id, &feed_id, &i.Title, &i.Url, &i.Description, &i.ReadState, &i.Starred, &i.PublishDate, &i.FullContent, &i.HeaderImage, &i.FeedUrl, &i.FeedTitle, &i.FeedCategory)
if err != nil {
log.Println(err)
return nil, err
}
// sanitize all fields from external input
// should do this at ingest time, probably, for efficiency
// but still may need to adjust rules
i.Title = p.Sanitize(i.Title)
i.Description = p.Sanitize(i.Description)
i.Description = rewriteImages(i.Description)
i.Url = p.Sanitize(i.Url)
i.FeedTitle = p.Sanitize(i.FeedTitle)
i.FeedUrl = p.Sanitize(i.FeedUrl)
i.FullContent = p.Sanitize(i.FullContent)
i.HeaderImage = p.Sanitize(i.HeaderImage)
i.CleanHeaderImage()
items = append(items, i)
}
if err = rows.Err(); err != nil {
return nil, err
}
return items, nil
}
func (i *Item) CleanHeaderImage() {
// TODO: blacklist of bad imgs
if i.HeaderImage == "https://s0.wp.com/i/blank.jpg" {
i.HeaderImage = ""
}
}
func rewriteImages(s string) string {
doc, err := goquery.NewDocumentFromReader(strings.NewReader(s))
if err != nil {
panic("can not parse doc to rewrite")
}
doc.Find("img").Each(func(i int, img *goquery.Selection) {
if src, ok := img.Attr("src"); ok {
img.SetAttr("src", proxyURL(src))
}
})
output, _ := doc.Html()
return output
}
func proxyURL(url string) string {
return "/image/" + base64.URLEncoding.EncodeToString([]byte(url))
}
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