From f49fc8ca0ba24923bb82e655b86c78de4ba2e3ad Mon Sep 17 00:00:00 2001
From: Jason Streifling <jason@streifling.com>
Date: Thu, 28 Mar 2024 12:51:33 +0100
Subject: [PATCH] Generate RSS to file

---
 cmd/control/rss.go   | 81 ++++++++++++++++++++++++++++++++++++++++++++
 cmd/view/articles.go | 17 ++++++++++
 2 files changed, 98 insertions(+)

diff --git a/cmd/control/rss.go b/cmd/control/rss.go
index 813cd8c..5721ddb 100644
--- a/cmd/control/rss.go
+++ b/cmd/control/rss.go
@@ -2,6 +2,8 @@ package control
 
 import (
 	"fmt"
+	"io"
+	"os"
 	"time"
 
 	"git.streifling.com/jason/rss"
@@ -48,3 +50,82 @@ func GetChannel(db *model.DB, title, link, description string) (*rss.Channel, er
 
 	return channel, nil
 }
+
+func GenerateRSS(db *model.DB, title, link, desc string) (*string, error) {
+	channel := &rss.Channel{
+		Title:       title,
+		Link:        link,
+		Description: desc,
+		Items:       make([]*rss.Item, 0),
+	}
+
+	articles, err := db.GetCertainArticles(true, false)
+	if err != nil {
+		return nil, fmt.Errorf("error getting published articles for RSS feed: %v", err)
+	}
+
+	for _, article := range articles {
+		tags, err := db.GetArticleTags(article.ID)
+		if err != nil {
+			return nil, fmt.Errorf("error getting tags for articles for RSS feed: %v", err)
+		}
+		tagNames := make([]string, 0)
+		for _, tag := range tags {
+			tagNames = append(tagNames, tag.Name)
+		}
+		tagNames = append(tagNames, fmt.Sprint("Orient Express ", article.IssueID))
+
+		user, err := db.GetUser(article.AuthorID)
+		if err != nil {
+			return nil, fmt.Errorf("error getting user user info for RSS feed: %v", err)
+		}
+
+		articleTitle, err := ConvertToPlain(article.Title)
+		if err != nil {
+			return nil, fmt.Errorf("error converting title to plain text for RSS feed: %v", err)
+		}
+
+		articleDescription, err := ConvertToPlain(article.Description)
+		if err != nil {
+			return nil, fmt.Errorf("error converting description to plain text for RSS feed: %v", err)
+		}
+
+		articleContent, err := ConvertToHTML(article.Content)
+		if err != nil {
+			return nil, fmt.Errorf("error converting content to HTML for RSS feed: %v", err)
+		}
+
+		channel.Items = append(channel.Items, &rss.Item{
+			Title:       articleTitle,
+			Author:      user.FirstName + user.LastName,
+			PubDate:     article.Created.Format(time.RFC1123Z),
+			Description: articleDescription,
+			Content:     &rss.Content{Value: articleContent},
+			Categories:  tagNames,
+		})
+	}
+
+	feed := rss.NewFeed()
+	feed.Channels = append(feed.Channels, channel)
+	rss, err := feed.ToXML()
+	if err != nil {
+		return nil, fmt.Errorf("error converting RSS feed to XML: %v", err)
+	}
+
+	return &rss, nil
+}
+
+func SaveRSS(filename string, feed *string) error {
+	file, err := os.Create(filename)
+	if err != nil {
+		return fmt.Errorf("error creating file for RSS feed: %v", err)
+	}
+	defer file.Close()
+	file.Chmod(0644)
+
+	if _, err = io.WriteString(file, *feed); err != nil {
+		return fmt.Errorf("error writing to RSS file: %v", err)
+	}
+
+	return nil
+}
diff --git a/cmd/view/articles.go b/cmd/view/articles.go
index fb10bdc..b6a9aba 100644
--- a/cmd/view/articles.go
+++ b/cmd/view/articles.go
@@ -305,6 +305,23 @@ func PublishArticle(db *model.DB, s *control.CookieStore) http.HandlerFunc {
 			return
 		}
 
+		feed, err := control.GenerateRSS(
+			db,
+			"Freimaurer Distrikt Niedersachsen und Sachsen-Anhalt",
+			"https://distrikt-ni-st.de",
+			"Freiheit, Gleichheit, Brüderlichkeit, Toleranz und Humanität",
+		)
+		if err != nil {
+			log.Println(err)
+			http.Error(w, err.Error(), http.StatusInternalServerError)
+			return
+		}
+		if err = control.SaveRSS("tmp/orientexpress_alle.rss", feed); err != nil {
+			log.Println(err)
+			http.Error(w, err.Error(), http.StatusInternalServerError)
+			return
+		}
+
 		tmpl, err := template.ParseFiles("web/templates/hub.html")
 		tmpl = template.Must(tmpl, err)
 		tmpl.ExecuteTemplate(w, "page-content", session.Values["role"])