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feed.go
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feed.go
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/*
* Copyright © 2018-2019 A Bunch Tell LLC.
*
* This file is part of WriteFreely.
*
* WriteFreely is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, included
* in the LICENSE file in this source code package.
*/
package writefreely
import (
"fmt"
"net/http"
"time"
. "github.com/gorilla/feeds"
"github.com/gorilla/mux"
stripmd "github.com/writeas/go-strip-markdown"
"github.com/writeas/web-core/log"
)
func ViewFeed(app *App, w http.ResponseWriter, req *http.Request) error {
alias := collectionAliasFromReq(req)
// Display collection if this is a collection
var c *Collection
var err error
if app.cfg.App.SingleUser {
c, err = app.db.GetCollectionByID(1)
} else {
c, err = app.db.GetCollection(alias)
}
if err != nil {
return nil
}
suspended, err := app.db.IsUserSuspended(c.OwnerID)
if err != nil {
log.Error("view feed: get user: %v", err)
return ErrInternalGeneral
}
if suspended {
return ErrCollectionNotFound
}
c.hostName = app.cfg.App.Host
if c.IsPrivate() || c.IsProtected() {
return ErrCollectionNotFound
}
// Fetch extra data about the Collection
// TODO: refactor out this logic, shared in collection.go:fetchCollection()
coll := &DisplayCollection{CollectionObj: &CollectionObj{Collection: *c}}
if c.PublicOwner {
u, err := app.db.GetUserByID(coll.OwnerID)
if err != nil {
// Log the error and just continue
log.Error("Error getting user for collection: %v", err)
} else {
coll.Owner = u
}
}
tag := mux.Vars(req)["tag"]
if tag != "" {
coll.Posts, _ = app.db.GetPostsTagged(app.cfg, c, tag, 1, false)
} else {
coll.Posts, _ = app.db.GetPosts(app.cfg, c, 1, false, true, false)
}
author := ""
if coll.Owner != nil {
author = coll.Owner.Username
}
collectionTitle := coll.DisplayTitle()
if tag != "" {
collectionTitle = tag + " — " + collectionTitle
}
baseUrl := coll.CanonicalURL()
basePermalinkUrl := baseUrl
siteURL := baseUrl
if tag != "" {
siteURL += "tag:" + tag
}
feed := &Feed{
Title: collectionTitle,
Link: &Link{Href: siteURL},
Description: coll.Description,
Author: &Author{author, ""},
Created: time.Now(),
}
var title, permalink string
for _, p := range *coll.Posts {
title = p.PlainDisplayTitle()
permalink = fmt.Sprintf("%s%s", baseUrl, p.Slug.String)
feed.Items = append(feed.Items, &Item{
Id: fmt.Sprintf("%s%s", basePermalinkUrl, p.Slug.String),
Title: title,
Link: &Link{Href: permalink},
Description: "<![CDATA[" + stripmd.Strip(p.Content) + "]]>",
Content: applyMarkdown([]byte(p.Content), "", app.cfg),
Author: &Author{author, ""},
Created: p.Created,
Updated: p.Updated,
})
}
rss, err := feed.ToRss()
if err != nil {
return err
}
fmt.Fprint(w, rss)
return nil
}

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