From 128e38651da616a5f2009739e85e7ce4df144d79 Mon Sep 17 00:00:00 2001
From: Niko Abeler <niko@rerere.org>
Date: Thu, 20 Jul 2023 19:49:52 +0200
Subject: [PATCH] minimal xml from v1

---
 Dockerfile                              |  8 ++-
 domain/model/siteconfig.go              |  1 +
 render/templates/views/site_config.tmpl |  3 +
 web/app.go                              |  2 +-
 web/rss_handler.go                      | 92 +++++++++++++++++++++++--
 web/siteconfig_handler.go               |  1 +
 6 files changed, 98 insertions(+), 9 deletions(-)

diff --git a/Dockerfile b/Dockerfile
index 8d9b4c5..b9c1301 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -4,7 +4,7 @@
 FROM golang:1.20-alpine as build
 
 
-RUN apk add --no-cache git
+RUN apk add --no-cache --update git gcc g++
 
 WORKDIR /tmp/owl
 
@@ -15,7 +15,7 @@ RUN go mod download
 
 COPY . .
 
-RUN go build -o ./out/owl ./cmd/owl
+RUN CGO_ENABLED=1 GOOS=linux go build -o ./out/owl ./cmd/owl
 
 
 ##
@@ -27,7 +27,9 @@ RUN apk add ca-certificates
 COPY --from=build /tmp/owl/out/ /bin/
 
 # This container exposes port 8080 to the outside world
-EXPOSE 8080
+EXPOSE 3000
+
+WORKDIR /owl
 
 # Run the binary program produced by `go install`
 ENTRYPOINT ["/bin/owl"]
\ No newline at end of file
diff --git a/domain/model/siteconfig.go b/domain/model/siteconfig.go
index b705e8b..1f3e99f 100644
--- a/domain/model/siteconfig.go
+++ b/domain/model/siteconfig.go
@@ -31,4 +31,5 @@ type SiteConfig struct {
 	FooterMenu         []MenuItem
 	Secret             string
 	AvatarUrl          string
+	FullUrl            string
 }
diff --git a/render/templates/views/site_config.tmpl b/render/templates/views/site_config.tmpl
index 81da0a9..745ac9b 100644
--- a/render/templates/views/site_config.tmpl
+++ b/render/templates/views/site_config.tmpl
@@ -31,6 +31,9 @@
     <label for="AvatarUrl">AvatarUrl</label>
     <input type="text" name="AvatarUrl" id="AvatarUrl" value="{{.AvatarUrl}}"/>
     
+    <label for="FullUrl">FullUrl</label>
+    <input type="text" name="FullUrl" id="FullUrl" value="{{.FullUrl}}"/>
+
     <input type="submit" value="Save" />
 </form>
 
diff --git a/web/app.go b/web/app.go
index 738f2df..79859c8 100644
--- a/web/app.go
+++ b/web/app.go
@@ -36,7 +36,7 @@ func NewWebApp(
 	listHandler := NewListHandler(entryService, configRepo)
 	entryHandler := NewEntryHandler(entryService, typeRegistry, authorService, configRepo)
 	mediaHandler := NewMediaHandler(binService)
-	rssHandler := NewRSSHandler(entryService)
+	rssHandler := NewRSSHandler(entryService, configRepo)
 	loginHandler := NewLoginHandler(authorService, configRepo)
 	editorListHandler := NewEditorListHandler(typeRegistry, configRepo)
 	editorHandler := NewEditorHandler(entryService, typeRegistry, binService, configRepo)
diff --git a/web/rss_handler.go b/web/rss_handler.go
index dc12784..e84d6d1 100644
--- a/web/rss_handler.go
+++ b/web/rss_handler.go
@@ -1,19 +1,101 @@
 package web
 
 import (
+	"bytes"
+	"encoding/xml"
+	"net/url"
 	"owl-blogs/app"
+	"owl-blogs/app/repository"
+	"owl-blogs/domain/model"
+	"sort"
+	"time"
 
 	"github.com/gofiber/fiber/v2"
 )
 
-type RSSHandler struct {
-	entrySvc *app.EntryService
+type RSS struct {
+	XMLName xml.Name   `xml:"rss"`
+	Version string     `xml:"version,attr"`
+	Channel RSSChannel `xml:"channel"`
 }
 
-func NewRSSHandler(entryService *app.EntryService) *RSSHandler {
-	return &RSSHandler{entrySvc: entryService}
+type RSSChannel struct {
+	Title       string    `xml:"title"`
+	Link        string    `xml:"link"`
+	Description string    `xml:"description"`
+	Items       []RSSItem `xml:"item"`
+}
+
+type RSSItem struct {
+	Guid        string `xml:"guid"`
+	Title       string `xml:"title"`
+	Link        string `xml:"link"`
+	PubDate     string `xml:"pubDate"`
+	Description string `xml:"description"`
+}
+
+func RenderRSSFeed(config model.SiteConfig, entries []model.Entry) (string, error) {
+
+	rss := RSS{
+		Version: "2.0",
+		Channel: RSSChannel{
+			Title:       config.Title,
+			Link:        config.FullUrl,
+			Description: config.SubTitle,
+			Items:       make([]RSSItem, 0),
+		},
+	}
+
+	for _, entry := range entries {
+		content := entry.Content()
+		url, _ := url.JoinPath(config.FullUrl, "/posts/", entry.ID())
+		rss.Channel.Items = append(rss.Channel.Items, RSSItem{
+			Guid:        url,
+			Title:       entry.Title(),
+			Link:        url,
+			PubDate:     entry.PublishedAt().Format(time.RFC1123Z),
+			Description: string(content),
+		})
+	}
+
+	buf := new(bytes.Buffer)
+	err := xml.NewEncoder(buf).Encode(rss)
+	if err != nil {
+		return "", err
+	}
+
+	return xml.Header + buf.String(), nil
+
+}
+
+type RSSHandler struct {
+	configRepo repository.ConfigRepository
+	entrySvc   *app.EntryService
+}
+
+func NewRSSHandler(entryService *app.EntryService, configRepo repository.ConfigRepository) *RSSHandler {
+	return &RSSHandler{entrySvc: entryService, configRepo: configRepo}
 }
 
 func (h *RSSHandler) Handle(c *fiber.Ctx) error {
-	return c.SendString("Hello, RSS!")
+	c.Set(fiber.HeaderContentType, fiber.MIMEApplicationXML)
+
+	siteConfig := getSiteConfig(h.configRepo)
+
+	entries, err := h.entrySvc.FindAllByType(&siteConfig.PrimaryListInclude, true, false)
+	if err != nil {
+		return err
+	}
+
+	// sort entries by date descending
+	sort.Slice(entries, func(i, j int) bool {
+		return entries[i].PublishedAt().After(*entries[j].PublishedAt())
+	})
+
+	rss, err := RenderRSSFeed(siteConfig, entries)
+	if err != nil {
+		return err
+	}
+
+	return c.SendString(rss)
 }
diff --git a/web/siteconfig_handler.go b/web/siteconfig_handler.go
index 0e62e25..f70a8cd 100644
--- a/web/siteconfig_handler.go
+++ b/web/siteconfig_handler.go
@@ -46,6 +46,7 @@ func (h *SiteConfigHandler) HandlePost(c *fiber.Ctx) error {
 	siteConfig.HeaderColor = c.FormValue("HeaderColor")
 	siteConfig.AuthorName = c.FormValue("AuthorName")
 	siteConfig.AvatarUrl = c.FormValue("AvatarUrl")
+	siteConfig.FullUrl = c.FormValue("FullUrl")
 
 	err = h.siteConfigRepo.Update(config.SITE_CONFIG, siteConfig)
 	if err != nil {