7 files changed, 100 insertions, 22 deletions
diff --git a/pkg/app/cache/update.go b/pkg/app/cache/update.go
new file mode 100644
index 0000000..c7d8c5a
--- /dev/null
+++ b/pkg/app/cache/update.go
@@ -0,0 +1,29 @@
+package cache
+
+import (
+	"archives/pkg/app/home"
+	"archives/pkg/app/list"
+	"archives/pkg/app/popular"
+	"archives/pkg/cache"
+	"archives/pkg/config"
+	"net/http"
+)
+
+func UpdateHandler(w http.ResponseWriter, r *http.Request) {
+	Update()
+	w.Write([]byte("Updated."))
+}
+
+func Init(){
+	cache.Init()
+}
+
+func Update(){
+	cache.Put("/", home.ComputeTemplateData())
+	cache.Put("/lists", list.ComputeBrowseTemplateData())
+	cache.Put("/popular", popular.ComputeThreadsTemplateData())
+	for _, listName := range config.AllPublicMailingLists() {
+		cache.Put("/"+listName+"/", list.ComputeShowTemplateData(listName))
+		cache.Put("/"+listName+"/", list.ComputeShowTemplateData(listName))
+	}
+}
diff --git a/pkg/app/home/home.go b/pkg/app/home/home.go
index fe8a56e..6d86095 100644
--- a/pkg/app/home/home.go
+++ b/pkg/app/home/home.go
@@ -4,6 +4,7 @@ package home
 
 import (
 	"archives/pkg/app/popular"
+	"archives/pkg/cache"
 	"archives/pkg/config"
 	"archives/pkg/database"
 	"archives/pkg/models"
@@ -14,7 +15,15 @@ import (
 
 // Show renders a template to show the landing page of the application
 func Show(w http.ResponseWriter, r *http.Request) {
+	templateData := cache.Get("/")
+	if templateData == nil {
+		http.NotFound(w,r)
+		return
+	}
+	renderIndexTemplate(w, templateData)
+}
 
+func ComputeTemplateData() interface{} {
 	var mailingLists []models.MailingList
 
 	for _, mailingList := range config.IndexMailingLists() {
@@ -48,14 +57,13 @@ func Show(w http.ResponseWriter, r *http.Request) {
 	//
 	popularThreads, err := popular.GetPopularThreads(10, "2020-06-01")
 	if err != nil {
-		http.NotFound(w, r)
-		return
+		return nil
 	}
 	if len(popularThreads) > 5 {
 		popularThreads = popularThreads[:5]
 	}
 
-	templateData := struct {
+	return struct {
 		MailingLists   []models.MailingList
 		PopularThreads []*models.Message
 		MessageCount   string
@@ -66,6 +74,4 @@ func Show(w http.ResponseWriter, r *http.Request) {
 		MessageCount:   formatMessageCount(getAllMessagesCount()),
 		CurrentMonth:   time.Now().Format("2006-01"),
 	}
-
-	renderIndexTemplate(w, templateData)
-}
+}
+\ No newline at end of file
diff --git a/pkg/app/list/browse.go b/pkg/app/list/browse.go
index fdc3ab1..5d8457e 100644
--- a/pkg/app/list/browse.go
+++ b/pkg/app/list/browse.go
@@ -1,6 +1,7 @@
 package list
 
 import (
+	"archives/pkg/cache"
 	"archives/pkg/config"
 	"archives/pkg/database"
 	"archives/pkg/models"
@@ -8,7 +9,15 @@ import (
 )
 
 func Browse(w http.ResponseWriter, r *http.Request) {
+	templateData := cache.Get("/lists")
+	if templateData == nil {
+		http.NotFound(w,r)
+		return
+	}
+	renderBrowseTemplate(w, templateData)
+}
 
+func ComputeBrowseTemplateData() interface{} {
 	var res []struct {
 		Name string
 		MessageCount int
@@ -19,8 +28,7 @@ func Browse(w http.ResponseWriter, r *http.Request) {
 		Select(&res)
 
 	if err != nil {
-		http.NotFound(w,r)
-		return
+		return nil
 	}
 
 	var currentMailingLists []models.MailingList
@@ -40,18 +48,15 @@ func Browse(w http.ResponseWriter, r *http.Request) {
 		}
 	}
 
-	browseData := struct {
+	return struct {
 		CurrentMailingLists []models.MailingList
 		FrozenArchives      []models.MailingList
 	}{
 		CurrentMailingLists: currentMailingLists,
 		FrozenArchives:      frozenArchives,
 	}
-
-	renderBrowseTemplate(w, browseData)
 }
 
-
 func contains(s []string, e string) bool {
 	for _, a := range s {
 		if a == e {
diff --git a/pkg/app/list/show.go b/pkg/app/list/show.go
index d90f236..5231b5b 100644
--- a/pkg/app/list/show.go
+++ b/pkg/app/list/show.go
@@ -1,6 +1,7 @@
 package list
 
 import (
+	"archives/pkg/cache"
 	"archives/pkg/database"
 	"archives/pkg/models"
 	"github.com/go-pg/pg/v10/orm"
@@ -9,9 +10,17 @@ import (
 )
 
 func Show(w http.ResponseWriter, r *http.Request) {
-
 	listName := strings.ReplaceAll(r.URL.Path, "/", "")
+	templateData := cache.Get("/" + listName + "/")
+	if templateData == nil {
+		http.NotFound(w,r)
+		return
+	}
+	renderShowTemplate(w, listName, templateData)
+}
 
+
+func ComputeShowTemplateData(listName string) interface{} {
 	var res []struct {
 		CombinedDate string
 		MessageCount int
@@ -36,9 +45,7 @@ func Show(w http.ResponseWriter, r *http.Request) {
 		Select(&res)
 
 	if err != nil {
-		http.NotFound(w, r)
-		return
+		return nil
 	}
-
-	renderShowTemplate(w, listName, res)
-}
+	return res
+}
+\ No newline at end of file
diff --git a/pkg/app/popular/threads.go b/pkg/app/popular/threads.go
index 5c12c8a..5d0788a 100644
--- a/pkg/app/popular/threads.go
+++ b/pkg/app/popular/threads.go
@@ -1,14 +1,23 @@
 package popular
 
 import (
+	"archives/pkg/cache"
 	"net/http"
 )
 
 func Threads(w http.ResponseWriter, r *http.Request) {
-	threads, err := GetPopularThreads(25, "2020-06-01")
-	if err != nil {
-		http.NotFound(w, r)
+	templateData := cache.Get("/popular")
+	if templateData == nil {
+		http.NotFound(w,r)
 		return
 	}
-	renderPopularThreads(w, threads)
+	renderPopularThreads(w, templateData)
 }
+
+func ComputeThreadsTemplateData() interface{} {
+	threads, err := GetPopularThreads(25, "2020-06-01")
+	if err != nil {
+		return nil
+	}
+	return threads
+}
+\ No newline at end of file
diff --git a/pkg/app/serve.go b/pkg/app/serve.go
index 62eac33..fed6435 100644
--- a/pkg/app/serve.go
+++ b/pkg/app/serve.go
@@ -3,6 +3,7 @@
 package app
 
 import (
+	"archives/pkg/app/cache"
 	"archives/pkg/app/home"
 	"archives/pkg/app/list"
 	"archives/pkg/app/message"
@@ -17,6 +18,10 @@ import (
 // Serve is used to serve the web application
 func Serve() {
 
+	// init caches
+	cache.Init()
+	cache.Update()
+
 	fmt.Println("Serving on Port " + config.Port())
 
 	for _, mailingList := range config.AllPublicMailingLists() {
@@ -37,6 +42,8 @@ func Serve() {
 	fs := http.StripPrefix("/assets/", http.FileServer(http.Dir("assets")))
 	http.Handle("/assets/", fs)
 
+	setRoute("/cache/update", cache.UpdateHandler)
+
 	log.Fatal(http.ListenAndServe(":"+config.Port(), nil))
 
 }
diff --git a/pkg/cache/storage.go b/pkg/cache/storage.go
new file mode 100644
index 0000000..c5b273b
--- /dev/null
+++ b/pkg/cache/storage.go
@@ -0,0 +1,15 @@
+package cache
+
+var data map[string]interface{}
+
+func Init(){
+	data = make(map[string]interface{})
+}
+
+func Put(key string, value interface{}) {
+	data[key] = value
+}
+
+func Get(key string) interface{} {
+	return data[key]
+}