Check for newer version available (#47)

* Add helm version requirement notes

* Check for newer version and offer upgrade

* fix lint

pkg/dashboard/api.go

@@ -44,7 +44,7 @@ func contextSetter(data *subproc.DataLayer) gin.HandlerFunc {
 	}
 }
 
-func NewRouter(abortWeb utils.ControlChan, data *subproc.DataLayer, version string) *gin.Engine {
+func NewRouter(abortWeb utils.ControlChan, data *subproc.DataLayer) *gin.Engine {
 	var api *gin.Engine
 	if os.Getenv("DEBUG") == "" {
 		api = gin.New()
@@ -58,12 +58,12 @@ func NewRouter(abortWeb utils.ControlChan, data *subproc.DataLayer, version stri
 	api.Use(errorHandler)
 
 	configureStatic(api)
-	configureRoutes(abortWeb, data, api, version)
+	configureRoutes(abortWeb, data, api)
 
 	return api
 }
 
-func configureRoutes(abortWeb utils.ControlChan, data *subproc.DataLayer, api *gin.Engine, version string) {
+func configureRoutes(abortWeb utils.ControlChan, data *subproc.DataLayer, api *gin.Engine) {
 	// server shutdown handler
 	api.DELETE("/", func(c *gin.Context) {
 		abortWeb <- struct{}{}
@@ -71,7 +71,7 @@ func configureRoutes(abortWeb utils.ControlChan, data *subproc.DataLayer, api *g
 	})
 
 	api.GET("/status", func(c *gin.Context) {
-		c.String(http.StatusOK, version)
+		c.IndentedJSON(http.StatusOK, data.VersionInfo)
 	})
 
 	configureHelms(api.Group("/api/helm"), data)

pkg/dashboard/server.go

@@ -2,13 +2,16 @@ package dashboard
 
 import (
 	"context"
+	"encoding/json"
 	"github.com/gin-gonic/gin"
+	"github.com/hashicorp/go-version"
 	"github.com/komodorio/helm-dashboard/pkg/dashboard/scanners"
 	"github.com/komodorio/helm-dashboard/pkg/dashboard/subproc"
 	"github.com/komodorio/helm-dashboard/pkg/dashboard/utils"
 	log "github.com/sirupsen/logrus"
 	"net/http"
 	"os"
+	"time"
 )
 
 func StartServer(version string) (string, utils.ControlChan) {
@@ -19,6 +22,9 @@ func StartServer(version string) (string, utils.ControlChan) {
 		os.Exit(1) // TODO: propagate error instead?
 	}
 
+	data.VersionInfo = &subproc.VersionInfo{CurVer: version}
+	go checkUpgrade(data.VersionInfo)
+
 	discoverScanners(&data)
 
 	address := os.Getenv("HD_BIND")
@@ -33,7 +39,7 @@ func StartServer(version string) (string, utils.ControlChan) {
 	}
 
 	abort := make(utils.ControlChan)
-	api := NewRouter(abort, &data, version)
+	api := NewRouter(abort, &data)
 	done := startBackgroundServer(address, api, abort)
 
 	return "http://" + address, done
@@ -75,3 +81,44 @@ func discoverScanners(data *subproc.DataLayer) {
 		}
 	}
 }
+
+func checkUpgrade(d *subproc.VersionInfo) {
+	url := "https://api.github.com/repos/komodorio/helm-dashboard/releases/latest"
+	type GHRelease struct {
+		Name string `json:"name"`
+	}
+
+	var myClient = &http.Client{Timeout: 5 * time.Second}
+	r, err := myClient.Get(url)
+	if err != nil {
+		log.Warnf("Failed to check for new version: %s", err)
+		return
+	}
+	defer r.Body.Close()
+
+	target := new(GHRelease)
+	err = json.NewDecoder(r.Body).Decode(target)
+	if err != nil {
+		log.Warnf("Failed to decode new release version: %s", err)
+		return
+	}
+	d.LatestVer = target.Name
+
+	v1, err := version.NewVersion(d.CurVer)
+	if err != nil {
+		log.Warnf("Failed to parse version: %s", err)
+		v1 = &version.Version{}
+	}
+
+	v2, err := version.NewVersion(d.LatestVer)
+	if err != nil {
+		log.Warnf("Failed to parse version: %s", err)
+	} else {
+		if v1.LessThan(v2) {
+			log.Warnf("Newer Helm Dashboard version is available: %s", d.LatestVer)
+			log.Warnf("Upgrade instructions: https://github.com/komodorio/helm-dashboard#installing")
+		} else {
+			log.Debugf("Got latest version from GH: %s", d.LatestVer)
+		}
+	}
+}

pkg/dashboard/static/datadog.js

@@ -5,8 +5,8 @@
 })(window,document,'script','https://www.datadoghq-browser-agent.com/datadog-rum-v4.js','DD_RUM')
     DD_RUM.onReady(function() {
         const xhr = new XMLHttpRequest();
-        xhr.onreadystatechange = function() {
-            const version = xhr.responseText;
+        xhr.onload = function() {
+            const version = JSON.parse(xhr.responseText).VerCur;
             if (xhr.readyState === XMLHttpRequest.DONE && version!=="dev") {
                 DD_RUM.init({
                     clientToken: 'pub16d64cd1c00cf073ce85af914333bf72',

pkg/dashboard/static/index.html

@@ -54,8 +54,11 @@
                     <a class="nav-link px-3 section-repo">Repository</a>
                 </li>
                 <li class="nav-item dropdown">
-                    <a class="nav-link dropdown-toggle" href="#" role="button" data-bs-toggle="dropdown"
+                    <a class="nav-link dropdown-toggle" role="button" data-bs-toggle="dropdown"
                        aria-expanded="false">
+                        <span class="position-absolute top-50 start-0 translate-middle p-1 bg-danger border border-light rounded-circle new-version-pill display-none">
+                            <span class="visually-hidden">New version</span>
+                        </span>
                         Help
                     </a>
                     <ul class="dropdown-menu fs-80">
@@ -67,6 +70,13 @@
                             <hr class="dropdown-divider">
                         </li>
                         <li><a class="dropdown-item disabled" href="#">Version <span id="toolVersion"></span></a></li>
+                        <li class="">
+                            <a class="dropdown-item position-relative" href="https://github.com/komodorio/helm-dashboard#installing" target="_blank">
+                            <span class="position-absolute top-50 start-0 translate-middle p-1 bg-danger border border-light rounded-circle new-version-pill display-none">
+                                <span class="visually-hidden">New version</span>
+                            </span>
+                            Upgrade to <span id="toolVersionUpgrade"></span>
+                        </a></li>
                     </ul>
                 </li>
 

pkg/dashboard/static/scripts.js

@@ -22,7 +22,7 @@ $(function () {
         }
     })
 
-    $.get("/status").fail(function (xhr) {
+    $.getJSON("/status").fail(function (xhr) {
         reportError("Failed to get tool version", xhr)
     }).done(function (data) {
         fillToolVersion(data)
@@ -51,18 +51,20 @@ function initView() {
 $("#topNav ul a").click(function () {
     const self = $(this)
 
+    if (self.hasClass("section-repo")) {
+        setHashParam("section", "repository")
+    } else if (self.hasClass("section-installed")) {
+        setHashParam("section", null)
+    } else {
+        return
+    }
+
     $("#topNav ul a").removeClass("active")
 
     const ctx = getHashParam("context")
     setHashParam(null, null)
     setHashParam("context", ctx)
 
-    if (self.hasClass("section-repo")) {
-        setHashParam("section", "repository")
-    } else {
-        setHashParam("section", null)
-    }
-
     initView()
 })
 
@@ -192,6 +194,14 @@ $(".bi-power").click(function () {
 })
 
 function isNewerVersion(oldVer, newVer) {
+    if (oldVer && oldVer[0] === 'v') {
+        oldVer = oldVer.substring(1)
+    }
+
+    if (newVer && newVer[0] === 'v') {
+        newVer = newVer.substring(1)
+    }
+
     const oldParts = oldVer.split('.')
     const newParts = newVer.split('.')
     for (let i = 0; i < newParts.length; i++) {
@@ -204,5 +214,9 @@ function isNewerVersion(oldVer, newVer) {
 }
 
 function fillToolVersion(data) {
-    $("#toolVersion").append($('<a>' + data + '</a>'))
+    $("#toolVersion").text(data.CurVer)
+    if (isNewerVersion(data.CurVer, data.LatestVer)) {
+        $("#toolVersionUpgrade").text(data.LatestVer)
+        $(".new-version-pill").show()
+    }
 }

pkg/dashboard/subproc/data.go

@@ -25,6 +25,12 @@ type DataLayer struct {
 	Helm        string
 	Kubectl     string
 	Scanners    []Scanner
+	VersionInfo *VersionInfo
+}
+
+type VersionInfo struct {
+	CurVer    string
+	LatestVer string
 }
 
 func (d *DataLayer) runCommand(cmd ...string) (string, error) {