Add --latest flag

Allow using the latest version of the Unifi controller with `--latest`.

fields/extract.go

@@ -14,12 +14,13 @@ import (
 	"path/filepath"
 	"strings"
 
+	"github.com/hashicorp/go-version"
 	"github.com/iancoleman/strcase"
 	"github.com/ulikunitz/xz"
 	"github.com/xor-gate/ar"
 )
 
-func downloadJar(version, outputDir string) (string, error) {
+func downloadJar(version *version.Version, outputDir string) (string, error) {
 	url := fmt.Sprintf("https://dl.ui.com/unifi/%s/unifi_sysvinit_all.deb", version)
 
 	debResp, err := http.Get(url)

fields/main.go

@@ -17,6 +17,7 @@ import (
 	"strings"
 	"text/template"
 
+	"github.com/hashicorp/go-version"
 	"github.com/iancoleman/strcase"
 )
 
@@ -181,23 +182,43 @@ func usage() {
 }
 
 func main() {
-
 	flag.Usage = usage
 
 	noEmbeddedTypesFlag := flag.Bool("no-embedded-types", true, "Whether to generate top-level type definitions for embedded type definitions")
 	versionBaseDirFlag := flag.String("version-base-dir", ".", "The base directory for version JSON files")
 	outputDirFlag := flag.String("output-dir", ".", "The output directory of the generated Go code")
 	downloadOnly := flag.Bool("download-only", false, "Only download and build the fields JSON directory, do not generate")
+	useLatestVersion := flag.Bool("latest", false, "Use the latest available version")
 
 	flag.Parse()
 
 	embedTypes = !*noEmbeddedTypesFlag
 
-	version := flag.Arg(0)
+	specifiedVersion := flag.Arg(0)
-	if version == "" {
+	if specifiedVersion != "" && *useLatestVersion {
-		fmt.Print("error: no version specified\n\n")
+		fmt.Print("error: cannot specify version with latest\n\n")
 		usage()
 		os.Exit(1)
+	} else if specifiedVersion == "" && !*useLatestVersion {
+		fmt.Print("error: must specify version or latest\n\n")
+		usage()
+		os.Exit(1)
+	}
+
+	var unifiVersion *version.Version
+	var err error
+
+	if *useLatestVersion {
+		unifiVersion, err = latestUnifiVersion()
+		if err != nil {
+			panic(err)
+		}
+	} else {
+		unifiVersion, err = version.NewVersion(specifiedVersion)
+		if err != nil {
+			fmt.Println(err)
+			os.Exit(1)
+		}
 	}
 
 	wd, err := os.Getwd()
@@ -205,7 +226,7 @@ func main() {
 		panic(err)
 	}
 
-	fieldsDir := filepath.Join(wd, *versionBaseDirFlag, fmt.Sprintf("v%s", version))
+	fieldsDir := filepath.Join(wd, *versionBaseDirFlag, fmt.Sprintf("v%s", unifiVersion))
 	outDir := filepath.Join(wd, *outputDirFlag)
 
 	fieldsInfo, err := os.Stat(fieldsDir)
@@ -220,7 +241,7 @@ func main() {
 		}
 
 		// download fields, create
-		jarFile, err := downloadJar(version, fieldsDir)
+		jarFile, err := downloadJar(unifiVersion, fieldsDir)
 		if err != nil {
 			panic(err)
 		}
@@ -372,7 +393,7 @@ func main() {
 package unifi
 
 const UnifiVersion = %q
-`, version)
+`, unifiVersion)
 	if err := ioutil.WriteFile(filepath.Join(outDir, "version.generated.go"), []byte(versionGo), 0644); err != nil {
 		panic(err)
 	}

fields/version.go

@@ -0,0 +1,63 @@
+package main
+
+import (
+	"encoding/json"
+	"net/http"
+
+	"github.com/hashicorp/go-version"
+)
+
+var uiDownloadUrl = "https://www.ui.com/download/?platform=unifi"
+
+func latestUnifiVersion() (*version.Version, error) {
+	client := &http.Client{}
+
+	req, err := http.NewRequest("GET", uiDownloadUrl, nil)
+	if err != nil {
+		return nil, err
+	}
+	req.Header.Add("X-Requested-With", "XMLHttpRequest")
+
+	resp, err := client.Do(req)
+	if err != nil {
+		return nil, err
+	}
+	defer resp.Body.Close()
+
+	var respData struct {
+		Downloads []struct {
+			Id           int    `json:"id"`
+			CategorySlug string `json:"category__slug"`
+			Filename     string `json:"filename"`
+			Version      string `json:"version"`
+		} `json:"downloads"`
+	}
+	var latestVersion *version.Version
+
+	err = json.NewDecoder(resp.Body).Decode(&respData)
+	if err != nil {
+		return nil, err
+	}
+
+	for _, download := range respData.Downloads {
+		if download.CategorySlug != "software" {
+			continue
+		}
+
+		if download.Filename != "unifi_sysvinit_all.deb" {
+			continue
+		}
+
+		downloadVersion, err := version.NewVersion(download.Version)
+		if err != nil {
+			// Skip this entry if the version isn't valid.
+			continue
+		}
+
+		if latestVersion == nil || downloadVersion.GreaterThan(latestVersion) {
+			latestVersion = downloadVersion
+		}
+	}
+
+	return latestVersion, nil
+}

fields/version_test.go

@@ -0,0 +1,159 @@
+package main
+
+import (
+	"encoding/json"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	"github.com/hashicorp/go-version"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestLatestUnifiVersion(t *testing.T) {
+	respData := map[string]interface{}{
+		"downloads": []map[string]interface{}{
+			{
+				"architecture":     "",
+				"build":            "",
+				"category__name":   "User Guides",
+				"category__slug":   "user-guides",
+				"changelog":        "",
+				"date_published":   "2018-03-05",
+				"description":      "",
+				"featured":         true,
+				"file_path":        "/downloads/guides/UniFi/UniFi_Controller_V5_UG.pdf",
+				"filename":         "UniFi_Controller_V5_UG.pdf",
+				"id":               898,
+				"mib":              "",
+				"name":             "UniFi® Controller v5 User Guide",
+				"products":         "UAP|UAP-AC-EDU|UAP–AC–IW|UAP–AC–IW–PRO|UAP-AC-LITE|UAP-AC-LR|UAP-AC-M|UAP-AC-M-PRO|UAP-AC-PRO|UAP-HD|UAP-IW|UAP-LR|UAP-nanoHD|UAP-PRO|UAP-SHD|UAP‑XG|UAS-XG|UC-CK|US-16-150W|US‑16‑XG|US-24|US-24-250W|US-24-500W|US-48|US-48-500W|US-48-750W|US-8|US-8-150W|US-8-60W|USG|USG-PRO-4|USG-XG-8|US-XG-6POE|UWB‑XG|UWB‑XG‑BK",
+				"rank":             1,
+				"revision_history": "",
+				"sdk__id":          nil,
+				"size":             nil,
+				"slug":             "unifi-controller-v5-user-guide",
+				"thumbnail":        "https://prd-www-cdn.ubnt.com/media/images/download/user-guides/UniFi_Controller_V5_UG.jpg",
+				"thumbnail_retina": "https://prd-www-cdn.ubnt.com/media/images/download/user-guides/UniFi_Controller_V5_UG-2x.jpg",
+				"version":          "",
+			},
+			{
+				"architecture":     "",
+				"build":            "",
+				"category__name":   "Software",
+				"category__slug":   "software",
+				"changelog":        "https://community.ui.com/releases/UniFi-Network-Controller-6-0-22/910ceffc-f0e9-4518-86c1-df5eeee34695",
+				"date_published":   "2020-09-17",
+				"description":      "UniFi Network Controller 6.0.22 for Debian/Ubuntu Linux and UniFi Cloud Key.",
+				"featured":         false,
+				"file_path":        "/downloads/unifi/6.0.22/unifi_sysvinit_all.deb",
+				"filename":         "unifi_sysvinit_all.deb",
+				"id":               2607,
+				"mib":              "",
+				"name":             "UniFi Network Controller 6.0.22 for Debian/Ubuntu Linux and UniFi Cloud Key",
+				"products":         "UAP|UAP-AC-EDU|UAP–AC–IW|UAP–AC–IW–PRO|UAP-AC-LITE|UAP-AC-LR|UAP-AC-M|UAP-AC-M-PRO|UAP-AC-PRO|UAP-BeaconHD|UAP-FlexHD|UAP-HD|UAP-IW|UAP-IW-HD|UAP-LR|UAP-nanoHD|UAP-Outdoor|UAP-Outdoor+|UAP-Outdoor5|UAP-PRO|UAP-SHD|UAP‑XG|UAS-XG|UBB|UC-CK|UCK-G2|UCK-G2-PLUS|US-16-150W|US‑16‑XG|US-24|US-24-250W|US-24-500W|US-48|US-48-500W|US-48-750W|US-8|US-8-150W|US-8-60W|USG|USG-PRO-4|USG-XG-8|US-L2-24-POE|US-L2-48-POE|USW-16-POE|USW-24-POE|USW-48-POE|USW-Flex|USW-Flex-Mini|USW-Industrial|USW-Lite-16-POE|USW-Pro-24-POE|USW-Pro-48-POE|US-XG-6POE|UWB‑XG|UWB‑XG‑BK",
+				"rank":             350,
+				"revision_history": "",
+				"sdk__id":          nil,
+				"size":             nil,
+				"slug":             "unifi-network-controller-6022-debianubuntu-linux-and-unifi-cloud-key",
+				"thumbnail":        nil,
+				"thumbnail_retina": nil,
+				"version":          "6.0.22",
+			},
+			{
+				"architecture":     "",
+				"build":            "",
+				"category__name":   "Software",
+				"category__slug":   "software",
+				"changelog":        "https://community.ui.com/releases/0cffd3ed-7429-4529-9a20-9fead78ebf66",
+				"date_published":   "2021-03-25",
+				"description":      "UniFi Network Controller 6.1.71 for Debian/Ubuntu Linux and UniFi Cloud Key.",
+				"featured":         false,
+				"file_path":        "/downloads/unifi/6.1.71/unifi_sysvinit_all.deb",
+				"filename":         "unifi_sysvinit_all.deb",
+				"id":               2777,
+				"mib":              "",
+				"name":             "UniFi Network Controller 6.1.71 for Debian/Ubuntu Linux and UniFi Cloud Key",
+				"products":         "UAP|UAP-AC-EDU|UAP–AC–IW|UAP–AC–IW–PRO|UAP-AC-LITE|UAP-AC-LR|UAP-AC-M|UAP-AC-M-PRO|UAP-AC-PRO|UAP-BeaconHD|UAP-FlexHD|UAP-HD|UAP-IW|UAP-IW-HD|UAP-LR|UAP-nanoHD|UAP-Outdoor|UAP-Outdoor+|UAP-Outdoor5|UAP-PRO|UAP-SHD|UAP‑XG|UAS-XG|UBB|UC-CK|UCK-G2|UCK-G2-PLUS|US-16-150W|US‑16‑XG|US-24|US-24-250W|US-24-500W|US-48|US-48-500W|US-48-750W|US-8|US-8-150W|US-8-60W|USG|USG-PRO-4|USG-XG-8|US-L2-24-POE|US-L2-48-POE|USP-RPS|USW-16-POE|USW-24|USW-24-POE|USW-48|USW-48-POE|USW-Aggregation|USW-Flex|USW-Flex-Mini|USW-Industrial|USW-Lite-16-POE|USW-Lite-8-PoE|USW-Pro-24|USW-Pro-24-POE|USW-Pro-48|USW-Pro-48-POE|US-XG-6POE|UWB‑XG|UWB‑XG‑BK",
+				"rank":             423,
+				"revision_history": "",
+				"sdk__id":          nil,
+				"size":             nil,
+				"slug":             "unifi-network-controller-6171-debianubuntu-linux-and-unifi-cloud-key",
+				"thumbnail":        nil,
+				"thumbnail_retina": nil,
+				"version":          "6.1.71",
+			},
+			{
+				"architecture":     "",
+				"build":            "",
+				"category__name":   "Software",
+				"category__slug":   "software",
+				"changelog":        "https://community.ui.com/releases/0dfcbc77-8a4f-4e20-bb93-07bbb0237e3a",
+				"date_published":   "2021-06-21",
+				"description":      "UniFi Network Application 6.2.26 for Debian/Ubuntu Linux and UniFi Cloud Key.",
+				"featured":         true,
+				"file_path":        "/downloads/unifi/6.2.26/unifi_sysvinit_all.deb",
+				"filename":         "unifi_sysvinit_all.deb",
+				"id":               2840,
+				"mib":              "",
+				"name":             "UniFi Network Application 6.2.26 for Debian/Ubuntu Linux and UniFi Cloud Key",
+				"products":         "UAP|UAP-AC-EDU|UAP–AC–IW|UAP–AC–IW–PRO|UAP-AC-LITE|UAP-AC-LR|UAP-AC-M|UAP-AC-M-PRO|UAP-AC-PRO|UAP-BeaconHD|UAP-FlexHD|UAP-HD|UAP-IW|UAP-IW-HD|UAP-LR|UAP-nanoHD|UAP-Outdoor|UAP-Outdoor+|UAP-Outdoor5|UAP-PRO|UAP-SHD|UAP‑XG|UAS-XG|UBB|UC-CK|UCK-G2|UCK-G2-PLUS|UDM|UDM-Pro|US-16-150W|US‑16‑XG|US-24|US-24-250W|US-24-500W|US-48|US-48-500W|US-48-750W|US-8|US-8-150W|US-8-60W|USG|USG-PRO-4|USG-XG-8|US-L2-24-POE|US-L2-48-POE|USP-RPS|USW-16-POE|USW-24|USW-24-POE|USW-48|USW-48-POE|USW-Aggregation|USW-Enterprise-24-PoE|USW-Flex|USW-Flex-Mini|USW-Industrial|USW-Lite-16-POE|USW-Lite-8-PoE|USW-Pro-24|USW-Pro-24-POE|USW-Pro-48|USW-Pro-48-POE|USW-Pro-Aggregation|US-XG-6POE|UWB‑XG|UWB‑XG‑BK",
+				"rank":             440,
+				"revision_history": "",
+				"sdk__id":          nil,
+				"size":             nil,
+				"slug":             "unifi-network-application-6226-debianubuntu-linux-and-unifi-cloud-key",
+				"thumbnail":        nil,
+				"thumbnail_retina": nil,
+				"version":          "6.2.26",
+			},
+			{
+				"architecture":     "",
+				"build":            "",
+				"category__name":   "Firmware",
+				"category__slug":   "firmware",
+				"changelog":        "https://community.ui.com/releases/a98a71d1-ce1e-4823-a1d2-4a5fa3d642b9",
+				"date_published":   "2021-07-14",
+				"description":      "UniFi firmware 5.60.9 for U6-Lite",
+				"featured":         true,
+				"file_path":        "/downloads/unifi/firmware/UAL6/5.60.9.12980/BZ.mt7621_5.60.9+12980.210702.0701.bin",
+				"filename":         "BZ.mt7621_5.60.9+12980.210702.0701.bin",
+				"id":               2847,
+				"mib":              "",
+				"name":             "UniFi firmware 5.60.9 for U6-Lite",
+				"products":         "U6-Lite",
+				"rank":             444,
+				"revision_history": "",
+				"sdk__id":          nil,
+				"size":             nil,
+				"slug":             "unifi-firmware-5609-u6-lite",
+				"thumbnail":        nil,
+				"thumbnail_retina": nil,
+				"version":          "5.60.9",
+			},
+		},
+		"products": []map[string]interface{}{},
+	}
+
+	server := httptest.NewServer(http.HandlerFunc(func(rw http.ResponseWriter, req *http.Request) {
+		assert.Equal(t, []string{"XMLHttpRequest"}, req.Header["X-Requested-With"])
+
+		resp, err := json.Marshal(respData)
+		assert.Nil(t, err)
+
+		_, err = rw.Write(resp)
+		assert.Nil(t, err)
+	}))
+	defer server.Close()
+
+	expected, err := version.NewVersion("6.2.26")
+	assert.Nil(t, err)
+
+	uiDownloadUrl = server.URL
+	actual, err := latestUnifiVersion()
+	assert.Nil(t, err)
+
+	assert.Equal(t, expected, actual)
+}

go.mod

@@ -4,6 +4,7 @@ module github.com/paultyng/go-unifi
 go 1.16
 
 require (
+	github.com/hashicorp/go-version v1.3.0
 	github.com/iancoleman/strcase v0.2.0
 	github.com/kr/pretty v0.1.0 // indirect
 	github.com/stretchr/testify v1.7.0

go.sum

@@ -1,6 +1,8 @@
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/hashicorp/go-version v1.3.0 h1:McDWVJIU/y+u1BRV06dPaLfLCaT7fUTJLp5r04x7iNw=
+github.com/hashicorp/go-version v1.3.0/go.mod h1:fltr4n8CU8Ke44wwGCBoEymUuxUHl09ZGVZPK5anwXA=
 github.com/iancoleman/strcase v0.2.0 h1:05I4QRnGpI0m37iZQRuskXh+w77mr6Z41lwQzuHLwW0=
 github.com/iancoleman/strcase v0.2.0/go.mod h1:iwCmte+B7n89clKwxIoIXy/HfoL7AsD47ZCWhYzw7ho=
 github.com/kr/pretty v0.1.0 h1:L/CwN0zerZDmRFUapSPitk6f+Q3+0za1rQkzVuMiMFI=