feat(update checks): started work on update checks

pkg/plugins/update_checker.go

@@ -0,0 +1,109 @@
+package plugins
+
+import (
+	"encoding/json"
+	"io/ioutil"
+	"net/http"
+	"strings"
+	"time"
+
+	"github.com/grafana/grafana/pkg/log"
+	"github.com/grafana/grafana/pkg/setting"
+)
+
+type GrafanaNetPlugins struct {
+	Plugins []GrafanaNetPlugin `json:"plugins"`
+}
+
+type GrafanaNetPlugin struct {
+	Id       string                    `json:"id"`
+	Versions []GrafanaNetPluginVersion `json:"versions"`
+}
+
+type GrafanaNetPluginVersion struct {
+	Version string `json:"version"`
+}
+
+type GithubLatest struct {
+	Stable  string `json:"stable"`
+	Testing string `json:"testing"`
+}
+
+func StartPluginUpdateChecker() {
+	if !setting.CheckForUpdates {
+		return
+	}
+
+	ticker := time.NewTicker(time.Second * 24)
+	for {
+		select {
+		case <-ticker.C:
+			checkForUpdates()
+		}
+	}
+}
+
+func checkForUpdates() {
+	log.Trace("Checking for updates")
+
+	client := http.Client{Timeout: time.Duration(5 * time.Second)}
+	resp, err := client.Get("https://grafana.net/api/plugins/repo?grafanaVersion=" + setting.BuildVersion)
+
+	if err != nil {
+		log.Trace("Failed to get plugins repo from grafana.net, %v", err.Error())
+		return
+	}
+
+	defer resp.Body.Close()
+
+	body, err := ioutil.ReadAll(resp.Body)
+	if err != nil {
+		log.Trace("Update check failed, reading response from grafana.net, %v", err.Error())
+		return
+	}
+
+	var data GrafanaNetPlugins
+	err = json.Unmarshal(body, &data)
+	if err != nil {
+		log.Trace("Failed to unmarshal plugin repo, reading response from grafana.net, %v", err.Error())
+		return
+	}
+
+	for _, plug := range Plugins {
+		for _, gplug := range data.Plugins {
+			if gplug.Id == plug.Id {
+				if len(gplug.Versions) > 0 {
+					plug.GrafanaNetVersion = gplug.Versions[0].Version
+					plug.GrafanaNetHasUpdate = plug.Info.Version != plug.GrafanaNetVersion
+				}
+			}
+		}
+	}
+
+	resp2, err := client.Get("https://raw.githubusercontent.com/grafana/grafana/master/latest.json")
+	if err != nil {
+		log.Trace("Failed to get lates.json repo from github: %v", err.Error())
+		return
+	}
+
+	defer resp2.Body.Close()
+	body, err = ioutil.ReadAll(resp2.Body)
+	if err != nil {
+		log.Trace("Update check failed, reading response from github.net, %v", err.Error())
+		return
+	}
+
+	var githubLatest GithubLatest
+	err = json.Unmarshal(body, &githubLatest)
+	if err != nil {
+		log.Trace("Failed to unmarshal github latest, reading response from github: %v", err.Error())
+		return
+	}
+
+	if strings.Contains(setting.BuildVersion, "-") {
+		GrafanaLatestVersion = githubLatest.Testing
+	} else {
+		GrafanaLatestVersion = githubLatest.Stable
+		GrafanaHasUpdate = githubLatest.Stable != setting.BuildVersion
+	}
+}