From 993864ea35fabc8c845617dfca43897ba039fa95 Mon Sep 17 00:00:00 2001
From: mappu <mappu04@gmail.com>
Date: Sun, 9 Jul 2017 17:20:10 +1200
Subject: [PATCH] implement /archive/[0-9]+ endpoint

---
 TODO.txt      |  2 --
 WikiServer.go | 21 ++++++++++++++++++++-
 rArchive.go   | 40 ++++++++++++++++++++++++++++++++++++++++
 3 files changed, 60 insertions(+), 3 deletions(-)
 create mode 100644 rArchive.go

diff --git a/TODO.txt b/TODO.txt
index 7ee5338..d7d343c 100644
--- a/TODO.txt
+++ b/TODO.txt
@@ -1,8 +1,6 @@
 
 Save changes
 
-Archive endpoint
-
 Article history
 
 Recent history
diff --git a/WikiServer.go b/WikiServer.go
index f47ed7d..590ea76 100644
--- a/WikiServer.go
+++ b/WikiServer.go
@@ -7,12 +7,14 @@ import (
 	"net/url"
 	"strconv"
 	"strings"
+	"time"
 )
 
 type WikiServer struct {
 	db      *WikiDB
 	opts    *ServerOptions
 	pageTmp *template.Template
+	loc     *time.Location
 }
 
 func NewWikiServer(opts *ServerOptions) (*WikiServer, error) {
@@ -23,13 +25,19 @@ func NewWikiServer(opts *ServerOptions) (*WikiServer, error) {
 
 	tmpl, err := template.New("yatwiki/page").Parse(pageTemplate)
 	if err != nil {
-		panic(err)
+		return nil, err
+	}
+
+	loc, err := time.LoadLocation(opts.Timezone)
+	if err != nil {
+		return nil, err
 	}
 
 	ws := WikiServer{
 		db:      wdb,
 		opts:    opts,
 		pageTmp: tmpl,
+		loc:     loc,
 	}
 	return &ws, nil
 }
@@ -94,6 +102,17 @@ func (this *WikiServer) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 
 			this.routeRawView(w, r, revId)
 			return
+
+		} else if strings.HasPrefix(r.URL.Path, this.opts.ExpectBaseURL+"archive/") {
+			revId, err := strconv.Atoi(r.URL.Path[len(this.opts.ExpectBaseURL+"archive/"):])
+			if err != nil {
+				this.serveErrorMessage(w, err)
+				return
+			}
+
+			this.routeArchive(w, r, revId)
+			return
+
 		}
 
 	}
diff --git a/rArchive.go b/rArchive.go
new file mode 100644
index 0000000..8c3ace1
--- /dev/null
+++ b/rArchive.go
@@ -0,0 +1,40 @@
+package yatwiki3
+
+import (
+	"database/sql"
+	"errors"
+	"html/template"
+	"net/http"
+	"net/url"
+	"time"
+)
+
+func (this *WikiServer) routeArchive(w http.ResponseWriter, r *http.Request, revId int) {
+	a, err := this.db.GetRevision(revId)
+	if err != nil {
+		if err == sql.ErrNoRows {
+			this.serveErrorMessage(w, errors.New("No such revision."))
+			return
+		}
+
+		this.serveErrorMessage(w, err)
+		return
+	}
+
+	pto := DefaultPageTemplateOptions(this.opts)
+	pto.CurrentPageName = a.Title
+	pto.CurrentPageIsArticle = true
+
+	bcr := NewBBCodeRenderer(this.opts.ExpectBaseURL)
+	pto.Content = template.HTML(
+		`<div class="info">`+
+			`You are viewing specific revision of this page, last modified `+
+			time.Unix(a.Modified, 0).In(this.loc).Format(this.opts.DateFormat)+`. `+
+			`Click <a href="`+template.HTMLEscapeString(this.opts.ExpectBaseURL+`view/`+url.QueryEscape(a.Title))+`">here</a> to see the latest revision.`+
+			`</div>`,
+	) + bcr.RenderHTML(string(a.Body))
+	pto.LoadCodeResources = bcr.CodePresent
+
+	this.servePageResponse(w, r, pto)
+	return
+}