Add version check

Close #11

main.go

@@ -13,6 +13,8 @@ func main() {
     if slices.Contains(os.Args, "--help") {
     } else if slices.Contains(os.Args, "--version") {
         cli.ShowVersion();
+    } else if slices.Contains(os.Args, "--check-update") {
+        cli.CheckVersionIsUpToDate();
     } else if slices.Contains(os.Args, "--show-config") {
         cli.ShowCurrentConfig()
     } else if slices.Contains(os.Args, "--run-manual-setup") {

src/cli/cli.go

@@ -376,3 +376,24 @@ func ListLocalMedia() {
 func ShowVersion() {
     fmt.Println(meta.GetVersion())
 }
+
+// Prints, if there is a current version.
+func CheckVersionIsUpToDate() {
+
+    output, err := meta.CheckVersionIsUpToDate()
+    if err != nil {
+        fmt.Println("Failed to get RSS stream for most recent entry")
+        fmt.Print(err)
+        panic("Aborting")
+    }
+
+    // Empty output has no title
+    if output.Title == "" {
+        fmt.Println("Your version is up to date")
+    } else {
+        fmt.Println("There is a more recent version, version: " + output.Title)
+        fmt.Println("\nReleased: " + output.PubDate)
+        fmt.Println("\nGet it at " + output.Link)
+    }
+
+}

src/meta/CheckVersionIsUpToDate.go

@@ -0,0 +1,47 @@
+package meta
+
+import (
+    "net/http"
+    "encoding/xml"
+)
+
+// Very reduced item, as only title, link and pubDate are useful for a version check.
+type Item struct {
+    Title     string    `xml:"title"`
+    Link      string    `xml:"link"`
+    PubDate   string    `xml:"pubDate"`
+}
+
+type Channel struct {
+    Items []Item `xml:"item"`
+}
+
+type Rss struct {
+    Channel Channel `xml:"channel"`
+}
+
+// Checks if the current version is up to date or not. If there is a newer / different
+// version.
+func CheckVersionIsUpToDate() (Item, error) {
+
+    resp, err := http.Get("https://gitea.armuli.eu/museum-digital/museum-digital-webdav-uploader/releases.rss")
+    if err != nil {
+        return Item{}, err
+    }
+    defer resp.Body.Close()
+
+    rss := Rss{}
+
+    decoder := xml.NewDecoder(resp.Body)
+    decodeErr := decoder.Decode(&rss)
+    if decodeErr != nil {
+        return Item{}, err
+    }
+
+    newestItem := rss.Channel.Items[0];
+    if (newestItem.Title == GetVersion() || newestItem.Title == "v" + GetVersion()) {
+        return Item{}, nil
+    }
+    return newestItem, nil
+
+}

src/meta/meta.go

@@ -2,5 +2,5 @@ package meta
 
 // Returns current version number.
 func GetVersion() string {
-    return "0.1"
+    return "0.1.1"
 }

src/webui/assets/md-uploader.js

@@ -351,7 +351,7 @@ class App {
 
         // Handle next auto upload
         const nextAutoUpload = document.createElement("span");
-        const startTimeStr = "Next scheduled check: ";
+        const startTimeStr = this.tls.next_scheduled_check + ": ";
         this.actionsArea.appendChild(nextAutoUpload);
 
         const options1 = {
@@ -365,10 +365,21 @@ class App {
         const dateTimeFormat1 = new Intl.DateTimeFormat(this.lang, options1);
         const nextUploadTime = Date.parse(this.config.next_auto_upload);
         const now = new Date();
-        const diffMs = nextUploadTime - now;
 
-        const diffMins = Math.round((diffMs % 86400000) / 60000); // minutes
-        nextAutoUpload.textContent = dateTimeFormat1.format(nextUploadTime) + " (in " + diffMins + " mins)";
+        setInterval(function() {
+            const diffMs = nextUploadTime - now;
+            const diffMins = Math.round((diffMs % 86400000) / 60000); // minutes
+            nextAutoUpload.textContent = startTimeStr + dateTimeFormat1.format(nextUploadTime) + " (in " + diffMins + " mins)";
+        }, 60);
+
+        // Version
+        const vSpan = document.createElement("a");
+        vSpan.textContent = this.tls.version + " " + this.config.version;
+        if (this.config.update_available === true) {
+            vSpan.style.color = "red";
+            vSpan.href = "https://gitea.armuli.eu/museum-digital/museum-digital-webdav-uploader/releases";
+        }
+        this.actionsArea.appendChild(vSpan)
 
     }
 

src/webui/serveApiGetSettings.go

@@ -13,6 +13,7 @@ type getSettingsApiResponse struct {
     SetupRequired bool `json:"setup_required"`
     Settings configloader.MDWebDavUploaderConfig `json:"settings"`
     NextAutoUpload string `json:"next_auto_upload"`
+    UpdateAvailable bool `json:"update_available"`
 }
 
 // Generates the API output for listing current settings.
@@ -27,7 +28,7 @@ func serveApiGetSettings(w http.ResponseWriter, r *http.Request) {
     }
 
 	setHeadersForJson(w)
-    output := getSettingsApiResponse{SetupRequired: setupRequired, Settings: config, Version: meta.GetVersion(), NextAutoUpload: nextAutoUpOut}
+    output := getSettingsApiResponse{SetupRequired: setupRequired, Settings: config, Version: meta.GetVersion(), NextAutoUpload: nextAutoUpOut, UpdateAvailable: updateAvailable}
 
     outputJson, encodeErr := json.Marshal(output)
     if encodeErr != nil {

src/webui/server.go

@@ -10,12 +10,14 @@ import (
     "github.com/go-co-op/gocron/v2"
     "gitea.armuli.eu/museum-digital/museum-digital-webdav-uploader/src/cli"
     "gitea.armuli.eu/museum-digital/museum-digital-webdav-uploader/src/configloader"
+    "gitea.armuli.eu/museum-digital/museum-digital-webdav-uploader/src/meta"
 )
 
 var config configloader.MDWebDavUploaderConfig
-var setupRequired bool
+var setupRequired   bool
 var scheduler       gocron.Scheduler
 var scheduledUpload gocron.Job
+var updateAvailable bool
 
 // Opens the application in the default browser.
 func openInBrowser(port string) {
@@ -69,9 +71,25 @@ func scheduleUploads() {
 
 }
 
+// Checks if a new update is available. If that can be confirmed, set updateAvailable
+// to true.
+func checkUpdateAvailable() {
+
+    output, err := meta.CheckVersionIsUpToDate()
+    // If the RSS stream could not be fetched or parsed, don't say anything
+    if err != nil || output.Title == "" {
+        updateAvailable = false
+    } else {
+        updateAvailable = true
+    }
+
+}
+
 // Sets up the server and manages routing.
 func Run() {
 
+    checkUpdateAvailable()
+
     config, setupRequired, _ = configloader.LoadFromFile("")
 
 	// Bind callable URLs

src/webui/translation-json

@@ -1 +1 @@
-Subproject commit 6803016b709dcc0bf92ddfc29c6bf7bd9bd29cf7
+Subproject commit 89deadcad02169b1d5bcb73b11a37b10e45ada2d