Merge pull request #71 from christianselig/feat/validate-subreddit-format

Add subreddit validation and de-register from old API

internal/api/accounts.go

@@ -183,6 +183,22 @@ func (a *api) upsertAccountsHandler(w http.ResponseWriter, r *http.Request) {
 		_ = a.accountRepo.Disassociate(ctx, &acc, &dev)
 	}
 
+	go func(apns string) {
+		url := fmt.Sprintf("https://apollopushserver.xyz/api/new-server-addition?apns_token=%s", apns)
+		req, err := http.NewRequest("POST", url, nil)
+		req.Header.Set("Authentication", "Bearer 98g5j89aurqwfcsp9khlnvgd38fa15")
+
+		if err != nil {
+			a.logger.WithFields(logrus.Fields{
+				"apns": apns,
+			}).Error(err)
+			return
+		}
+
+		resp, _ := a.httpClient.Do(req)
+		resp.Body.Close()
+	}(apns)
+
 	w.WriteHeader(http.StatusOK)
 }
 

internal/api/api.go

@@ -26,6 +26,7 @@ type api struct {
 	statsd     *statsd.Client
 	reddit     *reddit.Client
 	apns       *token.Token
+	httpClient *http.Client
 
 	accountRepo   domain.AccountRepository
 	deviceRepo    domain.DeviceRepository
@@ -63,11 +64,14 @@ func NewAPI(ctx context.Context, logger *logrus.Logger, statsd *statsd.Client, r
 	watcherRepo := repository.NewPostgresWatcher(pool)
 	userRepo := repository.NewPostgresUser(pool)
 
+	client := &http.Client{}
+
 	return &api{
 		logger:     logger,
 		statsd:     statsd,
 		reddit:     reddit,
 		apns:       apns,
+		httpClient: client,
 
 		accountRepo:   accountRepo,
 		deviceRepo:    deviceRepo,

internal/domain/subreddit.go

@@ -2,6 +2,8 @@ package domain
 
 import (
 	"context"
+	"errors"
+	"regexp"
 	"strings"
 
 	validation "github.com/go-ozzo/ozzo-validation/v4"
@@ -20,9 +22,21 @@ func (sr *Subreddit) NormalizedName() string {
 	return strings.ToLower(sr.Name)
 }
 
+func validPrefix(value interface{}) error {
+	s, _ := value.(string)
+	if len(s) < 2 {
+		return nil
+	}
+	if s[1] != '_' || s[0] != 'u' {
+		return nil
+	}
+
+	return errors.New("invalid subreddit format")
+}
+
 func (sr *Subreddit) Validate() error {
 	return validation.ValidateStruct(sr,
-		validation.Field(&sr.Name, validation.Required, validation.Length(3, 32)),
+		validation.Field(&sr.Name, validation.Required, validation.Length(3, 32), validation.By(validPrefix), validation.Match(regexp.MustCompile(`^[a-zA-Z0-9]\w{1,19}$`))),
 		validation.Field(&sr.SubredditID, validation.Required, validation.Length(4, 9)),
 	)
 }

internal/domain/subreddit_test.go

@@ -0,0 +1,34 @@
+package domain
+
+import (
+	"errors"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestValidate(t *testing.T) {
+	tests := map[string]struct {
+		subreddit Subreddit
+		err       error
+	}{
+		"invalid subreddit prefix":        {Subreddit{Name: "u_iamthatis"}, errors.New("invalid subreddit format")},
+		"valid subreddit":                 {Subreddit{Name: "pics", SubredditID: "abcd"}, nil},
+		"valid subreddit starting with u": {Subreddit{Name: "urcool", SubredditID: "abcd"}, nil},
+		"valid subreddit with _":          {Subreddit{Name: "p_i_x_a_r", SubredditID: "abcd"}, nil},
+	}
+
+	for scenario, tc := range tests {
+		t.Run(scenario, func(t *testing.T) {
+			err := tc.subreddit.Validate()
+
+			if tc.err == nil {
+				require.NoError(t, err)
+				return
+			}
+
+			assert.Error(t, err)
+		})
+	}
+}