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service_github.go
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/
service_github.go
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package main
import (
"encoding/json"
"net/http"
"regexp"
"strings"
"time"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
"golang.org/x/net/context"
)
const githubCacheDuration = 10 * time.Minute
func init() {
registerServiceHandler("github", githubServiceHandler{})
}
type githubRelease struct {
TagName string `json:"tag_name"`
Assets []githubAsset `json:"assets"`
}
type githubAsset struct {
Name string `json:"name"`
Downloads int64 `json:"download_count"`
}
type githubRepo struct {
StargazersCount int64 `json:"stargazers_count"`
}
type githubServiceHandler struct{}
func (githubServiceHandler) GetDocumentation() serviceHandlerDocumentationList {
return serviceHandlerDocumentationList{
{
ServiceName: "GitHub repo license",
DemoPath: "/github/license/Luzifer/badge-gen",
Arguments: []string{"license", "<user>", "<repo>"},
},
{
ServiceName: "GitHub latest tag",
DemoPath: "/github/latest-tag/Luzifer/badge-gen",
Arguments: []string{"latest-tag", "<user>", "<repo>"},
},
{
ServiceName: "GitHub latest release",
DemoPath: "/github/latest-release/lastpass/lastpass-cli",
Arguments: []string{"latest-release", "<user>", "<repo>"},
},
{
ServiceName: "GitHub downloads by repo",
DemoPath: "/github/downloads/atom/atom",
Arguments: []string{"downloads", "<user>", "<repo>"},
},
{
ServiceName: "GitHub downloads by release",
DemoPath: "/github/downloads/atom/atom/latest",
Arguments: []string{"downloads", "<user>", "<repo>", "<tag or \"latest\">"},
},
{
ServiceName: "GitHub downloads by release and asset",
DemoPath: "/github/downloads/atom/atom/v1.8.0/atom-amd64.deb",
Arguments: []string{"downloads", "<user>", "<repo>", "<tag or \"latest\">", "<asset>"},
},
{
ServiceName: "Github stars by repository",
DemoPath: "/github/stars/atom/atom",
Arguments: []string{"stars", "<user>", "<repo>"},
},
}
}
func (githubServiceHandler) IsEnabled() bool { return true }
func (g githubServiceHandler) Handle(ctx context.Context, params []string) (title, text, color string, err error) {
if len(params) < 2 { //nolint:gomnd
err = errors.New("no service-command / parameters were given")
return title, text, color, err
}
switch params[0] {
case "license":
title, text, color, err = g.handleLicense(ctx, params[1:])
case "latest-tag":
title, text, color, err = g.handleLatestTag(ctx, params[1:])
case "latest-release":
title, text, color, err = g.handleLatestRelease(ctx, params[1:])
case "downloads": //nolint:goconst
title, text, color, err = g.handleDownloads(ctx, params[1:])
case "stars":
title, text, color, err = g.handleStargazers(ctx, params[1:])
default:
err = errors.New("an unknown service command was called")
}
return title, text, color, err
}
func (g githubServiceHandler) handleStargazers(ctx context.Context, params []string) (title, text, color string, err error) {
path := strings.Join([]string{"repos", params[0], params[1]}, "/")
text, err = cacheStore.Get("github_repo_stargazers", path)
if err != nil {
r := githubRepo{}
if err = g.fetchAPI(ctx, path, nil, &r); err != nil {
return title, text, color, err
}
text = metricFormat(r.StargazersCount)
logErr(cacheStore.Set("github_repo_stargazers", path, text, githubCacheDuration), "writing Github repo stargazers to cache")
}
title = "stars"
color = colorNameBrightGreen
return title, text, color, err
}
func (g githubServiceHandler) handleDownloads(ctx context.Context, params []string) (title, text, color string, err error) {
switch len(params) {
case 2: //nolint:gomnd
title, text, color, err = g.handleRepoDownloads(ctx, params)
case 3: //nolint:gomnd
params = append(params, "total")
fallthrough
case 4: //nolint:gomnd
title, text, color, err = g.handleReleaseDownloads(ctx, params)
default:
err = errors.New("Unsupported number of arguments")
}
return title, text, color, err
}
func (g githubServiceHandler) handleReleaseDownloads(ctx context.Context, params []string) (title, text, color string, err error) {
path := strings.Join([]string{"repos", params[0], params[1], "releases", "tags", params[2]}, "/")
if params[2] == "latest" {
path = strings.Join([]string{"repos", params[0], params[1], "releases", params[2]}, "/")
}
text, err = cacheStore.Get("github_release_downloads", path)
if err != nil {
r := githubRelease{}
if err = g.fetchAPI(ctx, path, nil, &r); err != nil {
return title, text, color, err
}
var sum int64
for _, rel := range r.Assets {
if params[3] == "total" || rel.Name == params[3] {
sum += rel.Downloads
}
}
text = metricFormat(sum)
logErr(cacheStore.Set("github_release_downloads", path, text, githubCacheDuration), "writing Github release downloads to cache")
}
title = "downloads"
color = colorNameBrightGreen
return title, text, color, err
}
func (g githubServiceHandler) handleRepoDownloads(ctx context.Context, params []string) (title, text, color string, err error) {
path := strings.Join([]string{"repos", params[0], params[1], "releases"}, "/")
text, err = cacheStore.Get("github_repo_downloads", path)
if err != nil {
r := []githubRelease{}
// NOTE: This does not respect pagination!
if err = g.fetchAPI(ctx, path, nil, &r); err != nil {
return title, text, color, err
}
var sum int64
for _, rel := range r {
for _, rea := range rel.Assets {
sum += rea.Downloads
}
}
text = metricFormat(sum)
logErr(cacheStore.Set("github_repo_downloads", path, text, githubCacheDuration), "writing Github repo downloads to cache")
}
title = "downloads"
color = colorNameBrightGreen
return title, text, color, err
}
func (g githubServiceHandler) handleLatestRelease(ctx context.Context, params []string) (title, text, color string, err error) {
path := strings.Join([]string{"repos", params[0], params[1], "releases", "latest"}, "/")
text, err = cacheStore.Get("github_latest_release", path)
if err != nil {
r := githubRelease{}
if err = g.fetchAPI(ctx, path, nil, &r); err != nil {
return title, text, color, err
}
text = r.TagName
if text == "" {
text = "None" //nolint:goconst
}
logErr(cacheStore.Set("github_latest_release", path, text, githubCacheDuration), "writing Github last release to cache")
}
title = "release"
color = colorNameBlue
if regexp.MustCompile(`^v?0\.`).MatchString(text) {
color = "orange"
}
return title, text, color, err
}
func (g githubServiceHandler) handleLatestTag(ctx context.Context, params []string) (title, text, color string, err error) {
path := strings.Join([]string{"repos", params[0], params[1], "tags"}, "/")
text, err = cacheStore.Get("github_latest_tag", path)
if err != nil {
r := []struct {
Name string `json:"name"`
}{}
if err = g.fetchAPI(ctx, path, nil, &r); err != nil {
return title, text, color, err
}
if len(r) > 0 {
text = r[0].Name
} else {
text = "None"
}
logErr(cacheStore.Set("github_latest_tag", path, text, githubCacheDuration), "writing Github last tag to cache")
}
title = "tag"
color = colorNameBlue
if regexp.MustCompile(`^v?0\.`).MatchString(text) {
color = "orange"
}
return title, text, color, err
}
func (g githubServiceHandler) handleLicense(ctx context.Context, params []string) (title, text, color string, err error) {
path := strings.Join([]string{"repos", params[0], params[1], "license"}, "/")
text, err = cacheStore.Get("github_license", path)
if err != nil {
r := struct {
License struct {
Name string `json:"name"`
} `json:"license"`
}{}
headers := map[string]string{
"Accept": "application/vnd.github.drax-preview+json",
}
if err = g.fetchAPI(ctx, path, headers, &r); err != nil {
return title, text, color, err
}
text = r.License.Name
logErr(cacheStore.Set("github_license", path, text, githubCacheDuration), "writing Github license to cache")
}
title = "license"
color = "007ec6"
if text == "" {
text = "None"
}
return title, text, color, err
}
func (githubServiceHandler) fetchAPI(ctx context.Context, path string, headers map[string]string, out interface{}) error {
req, _ := http.NewRequestWithContext(ctx, "GET", "https://api.github.com/"+path, nil)
for k, v := range headers {
req.Header.Set(k, v)
}
// #configStore github.username - string - Username for Github auth to increase API requests
// #configStore github.personal_token - string - Token for Github auth to increase API requests
if configStore.Str("github.personal_token") != "" {
req.SetBasicAuth(configStore.Str("github.username"), configStore.Str("github.personal_token"))
}
resp, err := http.DefaultClient.Do(req)
if err != nil {
return errors.Wrap(err, "executing HTTP request")
}
defer func() {
if err := resp.Body.Close(); err != nil {
logrus.WithError(err).Error("closing request body (leaked fd)")
}
}()
return errors.Wrap(
json.NewDecoder(resp.Body).Decode(out),
"decoding JSON response",
)
}