feat: add SourceHut (sr.ht) provider (#2359)

* Add SourceHut (sr.ht) provider

* fix changelog entry

Signed-off-by: Jan Larwig <jan@larwig.com>

---------

Signed-off-by: Jan Larwig <jan@larwig.com>
Co-authored-by: Jan Larwig <jan@larwig.com>

providers/srht_test.go

@@ -0,0 +1,77 @@
+package providers
+
+import (
+	"context"
+	"net/http"
+	"net/http/httptest"
+	"net/url"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func testSourceHutProvider(hostname string) *SourceHutProvider {
+	p := NewSourceHutProvider(
+		&ProviderData{
+			ProviderName: "SourceHut",
+			LoginURL:     &url.URL{},
+			RedeemURL:    &url.URL{},
+			ProfileURL:   &url.URL{},
+			ValidateURL:  &url.URL{},
+			Scope:        ""},
+	)
+	p.ProviderName = "SourceHut"
+
+	if hostname != "" {
+		updateURL(p.Data().LoginURL, hostname)
+		updateURL(p.Data().RedeemURL, hostname)
+		updateURL(p.Data().ProfileURL, hostname)
+		updateURL(p.Data().ValidateURL, hostname)
+	}
+	return p
+}
+
+func testSourceHutBackend(payloads map[string][]string) *httptest.Server {
+	return httptest.NewServer(http.HandlerFunc(
+		func(w http.ResponseWriter, r *http.Request) {
+			index := 0
+			payload, ok := payloads[r.URL.Path]
+			if !ok {
+				w.WriteHeader(404)
+			} else if payload[index] == "" {
+				w.WriteHeader(204)
+			} else {
+				w.WriteHeader(200)
+				w.Write([]byte(payload[index]))
+			}
+		}))
+}
+
+func TestSourceHutProvider_ValidateSessionWithBaseUrl(t *testing.T) {
+	b := testSourceHutBackend(map[string][]string{})
+	defer b.Close()
+
+	bURL, _ := url.Parse(b.URL)
+	p := testSourceHutProvider(bURL.Host)
+
+	session := CreateAuthorizedSession()
+
+	valid := p.ValidateSession(context.Background(), session)
+	assert.False(t, valid)
+}
+
+func TestSourceHutProvider_ValidateSessionWithUserEmails(t *testing.T) {
+	b := testSourceHutBackend(map[string][]string{
+		"/query":   {`{"data":{"me":{"username":"bitfehler","email":"ch@bitfehler.net"}}}`},
+		"/profile": {`ok`},
+	})
+	defer b.Close()
+
+	bURL, _ := url.Parse(b.URL)
+	p := testSourceHutProvider(bURL.Host)
+
+	session := CreateAuthorizedSession()
+
+	valid := p.ValidateSession(context.Background(), session)
+	assert.True(t, valid)
+}