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diff --git a/read.go b/read.go
index 3bc91c7..683f124 100644
--- a/read.go
+++ b/read.go
@@ -1,305 +1,307 @@
/*
* 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 (
"database/sql"
"fmt"
. "github.com/gorilla/feeds"
"github.com/gorilla/mux"
stripmd "github.com/writeas/go-strip-markdown"
"github.com/writeas/impart"
"github.com/writeas/web-core/log"
"github.com/writeas/web-core/memo"
"github.com/writeas/writefreely/page"
"html/template"
"math"
"net/http"
"strconv"
"time"
)
const (
tlFeedLimit = 100
tlAPIPageLimit = 10
tlMaxAuthorPosts = 5
tlPostsPerPage = 16
)
type localTimeline struct {
m *memo.Memo
posts *[]PublicPost
// Configuration values
postsPerPage int
}
type readPublication struct {
page.StaticPage
Posts *[]PublicPost
CurrentPage int
TotalPages int
+ SelTopic string
}
func initLocalTimeline(app *App) {
app.timeline = &localTimeline{
postsPerPage: tlPostsPerPage,
m: memo.New(app.FetchPublicPosts, 10*time.Minute),
}
}
// satisfies memo.Func
func (app *App) FetchPublicPosts() (interface{}, error) {
// Finds all public posts and posts in a public collection published during the owner's active subscription period and within the last 3 months
rows, err := app.db.Query(`SELECT p.id, alias, c.title, p.slug, p.title, p.content, p.text_appearance, p.language, p.rtl, p.created, p.updated
FROM collections c
LEFT JOIN posts p ON p.collection_id = c.id
WHERE c.privacy = 1 AND (p.created >= ` + app.db.dateSub(3, "month") + ` AND p.created <= ` + app.db.now() + ` AND pinned_position IS NULL)
ORDER BY p.created DESC`)
if err != nil {
log.Error("Failed selecting from posts: %v", err)
return nil, impart.HTTPError{http.StatusInternalServerError, "Couldn't retrieve collection posts." + err.Error()}
}
defer rows.Close()
ap := map[string]uint{}
posts := []PublicPost{}
for rows.Next() {
p := &Post{}
c := &Collection{}
var alias, title sql.NullString
err = rows.Scan(&p.ID, &alias, &title, &p.Slug, &p.Title, &p.Content, &p.Font, &p.Language, &p.RTL, &p.Created, &p.Updated)
if err != nil {
log.Error("[READ] Unable to scan row, skipping: %v", err)
continue
}
c.hostName = app.cfg.App.Host
isCollectionPost := alias.Valid
if isCollectionPost {
c.Alias = alias.String
if c.Alias != "" && ap[c.Alias] == tlMaxAuthorPosts {
// Don't add post if we've hit the post-per-author limit
continue
}
c.Public = true
c.Title = title.String
}
p.extractData()
p.HTMLContent = template.HTML(applyMarkdown([]byte(p.Content), ""))
fp := p.processPost()
if isCollectionPost {
fp.Collection = &CollectionObj{Collection: *c}
}
posts = append(posts, fp)
ap[c.Alias]++
}
return posts, nil
}
func viewLocalTimelineAPI(app *App, w http.ResponseWriter, r *http.Request) error {
updateTimelineCache(app.timeline)
skip, _ := strconv.Atoi(r.FormValue("skip"))
posts := []PublicPost{}
for i := skip; i < skip+tlAPIPageLimit && i < len(*app.timeline.posts); i++ {
posts = append(posts, (*app.timeline.posts)[i])
}
return impart.WriteSuccess(w, posts, http.StatusOK)
}
func viewLocalTimeline(app *App, w http.ResponseWriter, r *http.Request) error {
if !app.cfg.App.LocalTimeline {
return impart.HTTPError{http.StatusNotFound, "Page doesn't exist."}
}
vars := mux.Vars(r)
var p int
page := 1
p, _ = strconv.Atoi(vars["page"])
if p > 0 {
page = p
}
return showLocalTimeline(app, w, r, page, vars["author"], vars["tag"])
}
func updateTimelineCache(tl *localTimeline) {
// Fetch posts if enough time has passed since last cache
if tl.posts == nil || tl.m.Invalidate() {
log.Info("[READ] Updating post cache")
var err error
var postsInterfaces interface{}
postsInterfaces, err = tl.m.Get()
if err != nil {
log.Error("[READ] Unable to cache posts: %v", err)
} else {
castPosts := postsInterfaces.([]PublicPost)
tl.posts = &castPosts
}
}
}
func showLocalTimeline(app *App, w http.ResponseWriter, r *http.Request, page int, author, tag string) error {
updateTimelineCache(app.timeline)
pl := len(*(app.timeline.posts))
ttlPages := int(math.Ceil(float64(pl) / float64(app.timeline.postsPerPage)))
start := 0
if page > 1 {
start = app.timeline.postsPerPage * (page - 1)
if start > pl {
return impart.HTTPError{http.StatusFound, fmt.Sprintf("/read/p/%d", ttlPages)}
}
}
end := app.timeline.postsPerPage * page
if end > pl {
end = pl
}
var posts []PublicPost
if author != "" {
posts = []PublicPost{}
for _, p := range *app.timeline.posts {
if author == "anonymous" {
if p.Collection == nil {
posts = append(posts, p)
}
} else if p.Collection != nil && p.Collection.Alias == author {
posts = append(posts, p)
}
}
} else if tag != "" {
posts = []PublicPost{}
for _, p := range *app.timeline.posts {
if p.HasTag(tag) {
posts = append(posts, p)
}
}
} else {
posts = *app.timeline.posts
posts = posts[start:end]
}
d := &readPublication{
pageForReq(app, r),
&posts,
page,
ttlPages,
+ tag,
}
err := templates["read"].ExecuteTemplate(w, "base", d)
if err != nil {
log.Error("Unable to render reader: %v", err)
fmt.Fprintf(w, ":(")
}
return nil
}
// NextPageURL provides a full URL for the next page of collection posts
func (c *readPublication) NextPageURL(n int) string {
return fmt.Sprintf("/read/p/%d", n+1)
}
// PrevPageURL provides a full URL for the previous page of collection posts,
// returning a /page/N result for pages >1
func (c *readPublication) PrevPageURL(n int) string {
if n == 2 {
// Previous page is 1; no need for /p/ prefix
return "/read"
}
return fmt.Sprintf("/read/p/%d", n-1)
}
// handlePostIDRedirect handles a route where a post ID is given and redirects
// the user to the canonical post URL.
func handlePostIDRedirect(app *App, w http.ResponseWriter, r *http.Request) error {
vars := mux.Vars(r)
postID := vars["post"]
p, err := app.db.GetPost(postID, 0)
if err != nil {
return err
}
if !p.CollectionID.Valid {
// No collection; send to normal URL
// NOTE: not handling single user blogs here since this handler is only used for the Reader
return impart.HTTPError{http.StatusFound, app.cfg.App.Host + "/" + postID + ".md"}
}
c, err := app.db.GetCollectionBy("id = ?", fmt.Sprintf("%d", p.CollectionID.Int64))
if err != nil {
return err
}
c.hostName = app.cfg.App.Host
// Retrieve collection information and send user to canonical URL
return impart.HTTPError{http.StatusFound, c.CanonicalURL() + p.Slug.String}
}
func viewLocalTimelineFeed(app *App, w http.ResponseWriter, req *http.Request) error {
if !app.cfg.App.LocalTimeline {
return impart.HTTPError{http.StatusNotFound, "Page doesn't exist."}
}
updateTimelineCache(app.timeline)
feed := &Feed{
Title: app.cfg.App.SiteName + " Reader",
Link: &Link{Href: app.cfg.App.Host},
Description: "Read the latest posts from " + app.cfg.App.SiteName + ".",
Created: time.Now(),
}
c := 0
var title, permalink, author string
for _, p := range *app.timeline.posts {
if c == tlFeedLimit {
break
}
title = p.PlainDisplayTitle()
permalink = p.CanonicalURL()
if p.Collection != nil {
author = p.Collection.Title
} else {
author = "Anonymous"
permalink += ".md"
}
i := &Item{
Id: app.cfg.App.Host + "/read/a/" + p.ID,
Title: title,
Link: &Link{Href: permalink},
Description: "<![CDATA[" + stripmd.Strip(p.Content) + "]]>",
Content: applyMarkdown([]byte(p.Content), ""),
Author: &Author{author, ""},
Created: p.Created,
Updated: p.Updated,
}
feed.Items = append(feed.Items, i)
c++
}
rss, err := feed.ToRss()
if err != nil {
return err
}
fmt.Fprint(w, rss)
return nil
}
diff --git a/templates/read.tmpl b/templates/read.tmpl
index cd03b9d..e7527bc 100644
--- a/templates/read.tmpl
+++ b/templates/read.tmpl
@@ -1,127 +1,127 @@
{{define "head"}}<title>{{.SiteName}} Reader</title>
<link rel="alternate" type="application/rss+xml" title="{{.SiteName}} Reader" href="/read/feed/" />
{{if gt .CurrentPage 1}}<link rel="prev" href="{{.PrevPageURL .CurrentPage}}">{{end}}
{{if lt .CurrentPage .TotalPages}}<link rel="next" href="{{.NextPageURL .CurrentPage}}">{{end}}
<meta name="description" content="Read the latest posts from {{.SiteName}}.">
<meta itemprop="name" content="{{.SiteName}} Reader">
<meta itemprop="description" content="Read the latest posts from {{.SiteName}}.">
<meta name="twitter:card" content="summary_large_image">
<meta name="twitter:title" content="{{.SiteName}} Reader">
<meta name="twitter:description" content="Read the latest posts from {{.SiteName}}.">
<meta property="og:title" content="{{.SiteName}} Reader" />
<meta property="og:type" content="object" />
<meta property="og:description" content="Read the latest posts from {{.SiteName}}." />
<style>
.heading h1 {
font-weight: 300;
text-align: center;
margin: 3em 0 0;
}
.heading p {
text-align: center;
margin: 1.5em 0 4.5em;
font-size: 1.1em;
color: #777;
}
#wrapper {
font-size: 1.2em;
}
.preview {
max-height: 180px;
overflow: hidden;
position: relative;
}
.preview .over {
position: absolute;
top: 5em;
bottom: 0;
left: 0;
right: 0;
/* Permalink - use to edit and share this gradient: http://colorzilla.com/gradient-editor/#ffffff+0,ffffff+100&0+0,1+100 */
background: -moz-linear-gradient(top, rgba(255,255,255,0) 0%, rgba(255,255,255,1) 100%); /* FF3.6-15 */
background: -webkit-linear-gradient(top, rgba(255,255,255,0) 0%,rgba(255,255,255,1) 100%); /* Chrome10-25,Safari5.1-6 */
background: linear-gradient(to bottom, rgba(255,255,255,0) 0%,rgba(255,255,255,1) 100%); /* W3C, IE10+, FF16+, Chrome26+, Opera12+, Safari7+ */
filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#00ffffff', endColorstr='#ffffff',GradientType=0 ); /* IE6-9 */
}
p.source {
font-size: 0.86em;
margin-top: 0.25em;
margin-bottom: 0;
}
.attention-box {
text-align: center;
font-size: 1.1em;
}
.attention-box hr { margin: 4rem auto; }
hr { max-width: 40rem; }
header {
padding: 0 !important;
text-align: left !important;
margin: 1em !important;
max-width: 100% !important;
}
body#collection header nav {
display: inline !important;
margin: 0 0 0 1em !important;
}
header nav#user-nav {
margin-left: 0 !important;
}
</style>
{{end}}
{{define "body-attrs"}}id="collection"{{end}}
{{define "content"}}
<div class="content-container snug" style="max-width: 40rem;">
<h1 style="text-align:center">Reader</h1>
- <p>Read the latest posts from {{.SiteName}}. {{if .Username}}To showcase your writing here, go to your <a href="/me/c/">blog</a> settings and select the <em>Public</em> option.{{end}}</p>
+ <p{{if .SelTopic}} style="text-align:center"{{end}}>{{if .SelTopic}}#{{.SelTopic}} posts{{else}}Read the latest posts from {{.SiteName}}. {{if .Username}}To showcase your writing here, go to your <a href="/me/c/">blog</a> settings and select the <em>Public</em> option.{{end}}{{end}}</p>
</div>
<div id="wrapper">
{{ if gt (len .Posts) 0 }}
<section itemscope itemtype="http://schema.org/Blog">
{{range .Posts}}<article class="{{.Font}} h-entry" itemscope itemtype="http://schema.org/BlogPosting">
{{if .Title.String}}<h2 class="post-title" itemprop="name" class="p-name"><a href="{{if .Slug.String}}{{.Collection.CanonicalURL}}{{.Slug.String}}{{else}}{{.CanonicalURL}}.md{{end}}" itemprop="url" class="u-url">{{.PlainDisplayTitle}}</a></h2>
<time class="dt-published" datetime="{{.Created}}" pubdate itemprop="datePublished" content="{{.Created}}">{{if not .Title.String}}<a href="{{.Collection.CanonicalURL}}{{.Slug.String}}" itemprop="url">{{end}}{{.DisplayDate}}{{if not .Title.String}}</a>{{end}}</time>
{{else}}
<h2 class="post-title" itemprop="name"><time class="dt-published" datetime="{{.Created}}" pubdate itemprop="datePublished" content="{{.Created}}"><a href="{{if .Collection}}{{.Collection.CanonicalURL}}{{.Slug.String}}{{else}}{{.CanonicalURL}}.md{{end}}" itemprop="url" class="u-url">{{.DisplayDate}}</a></time></h2>
{{end}}
<p class="source">{{if .Collection}}from <a href="{{.Collection.CanonicalURL}}">{{.Collection.DisplayTitle}}</a>{{else}}<em>Anonymous</em>{{end}}</p>
{{if .Excerpt}}<div class="p-summary" {{if .Language}}lang="{{.Language.String}}"{{end}} dir="{{.Direction}}">{{.Excerpt}}</div>
<a class="read-more" href="{{if .Collection}}{{.Collection.CanonicalURL}}{{.Slug.String}}{{else}}{{.CanonicalURL}}.md{{end}}">{{localstr "Read more..." .Language.String}}</a>{{else}}<div class="e-content preview" {{if .Language}}lang="{{.Language.String}}"{{end}} dir="{{.Direction}}">{{ if not .HTMLContent }}<p id="post-body" class="e-content preview">{{.Content}}</p>{{ else }}{{.HTMLContent}}{{ end }}<div class="over">&nbsp;</div></div>
<a class="read-more maybe" href="{{if .Collection}}{{.Collection.CanonicalURL}}{{.Slug.String}}{{else}}{{.CanonicalURL}}.md{{end}}">{{localstr "Read more..." .Language.String}}</a>{{end}}</article>
{{end}}
</section>
{{ else }}
<div class="attention-box">
<p>No posts here yet!</p>
</div>
{{ end }}
{{if gt .TotalPages 1}}<nav id="paging" class="content-container clearfix">
{{if lt .CurrentPage .TotalPages}}<a href="{{.NextPageURL .CurrentPage}}">&#8672; Older</a>{{end}}
{{if gt .CurrentPage 1}}<a style="float:right;" href="{{.PrevPageURL .CurrentPage}}">Newer &#8674;</a>{{end}}
</nav>{{end}}
</div>
<script type="text/javascript">
(function() {
var $articles = document.querySelectorAll('article');
for (var i=0; i<$articles.length; i++) {
var $art = $articles[i];
var $more = $art.querySelector('.read-more.maybe');
if ($more != null) {
if ($art.querySelector('.e-content.preview').clientHeight < 180) {
$more.parentNode.removeChild($more);
var $overlay = $art.querySelector('.over');
$overlay.parentNode.removeChild($overlay);
}
}
}
})();
</script>
{{end}}

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