[feature] add authorization to the already-existing authentication (#365)

* add ensureUserIsAuthorizedOrRedirect to /oauth/authorize

* adding authorization (email confirm, account approve, etc) to TokenCheck

* revert un-needed changes to signin.go

* oops what happened here

* error css

* add account.SuspendedAt check

* remove redundant checks from oauth util Authed function

* wip tests

* tests passing

* stop stripping useful information from ErrAlreadyExists

* that feeling of scraping the dryer LINT off the screen

* oops I didn't mean to get rid of this NewTestRouter function

* make tests work with recorder

* re-add ConfigureTemplatesWithGin to handle template path err

Co-authored-by: tsmethurst <tobi.smethurst@protonmail.com>

internal/api/client/auth/auth.go

@@ -32,10 +32,23 @@
 const (
 	// AuthSignInPath is the API path for users to sign in through
 	AuthSignInPath = "/auth/sign_in"
+
+	// CheckYourEmailPath users land here after registering a new account, instructs them to confirm thier email
+	CheckYourEmailPath = "/check_your_email"
+
+	// WaitForApprovalPath users land here after confirming thier email but before an admin approves thier account
+	// (if such is required)
+	WaitForApprovalPath = "/wait_for_approval"
+
+	// AccountDisabledPath users land here when thier account is suspended by an admin
+	AccountDisabledPath = "/account_disabled"
+
 	// OauthTokenPath is the API path to use for granting token requests to users with valid credentials
 	OauthTokenPath = "/oauth/token"
+
 	// OauthAuthorizePath is the API path for authorization requests (eg., authorize this app to act on my behalf as a user)
 	OauthAuthorizePath = "/oauth/authorize"
+
 	// CallbackPath is the API path for receiving callback tokens from external OIDC providers
 	CallbackPath = oidc.CallbackPath
 

internal/api/client/auth/auth_test.go

@@ -18,4 +18,96 @@
 
 package auth_test
 
-// TODO
+import (
+	"context"
+	"fmt"
+	"net/http/httptest"
+
+	"github.com/gin-contrib/sessions"
+	"github.com/gin-contrib/sessions/memstore"
+	"github.com/gin-gonic/gin"
+	"github.com/spf13/viper"
+	"github.com/stretchr/testify/suite"
+	"github.com/superseriousbusiness/gotosocial/internal/api/client/auth"
+	"github.com/superseriousbusiness/gotosocial/internal/config"
+	"github.com/superseriousbusiness/gotosocial/internal/db"
+	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
+	"github.com/superseriousbusiness/gotosocial/internal/oauth"
+	"github.com/superseriousbusiness/gotosocial/internal/oidc"
+	"github.com/superseriousbusiness/gotosocial/internal/router"
+	"github.com/superseriousbusiness/gotosocial/testrig"
+)
+
+type AuthStandardTestSuite struct {
+	suite.Suite
+	db          db.DB
+	idp         oidc.IDP
+	oauthServer oauth.Server
+
+	// standard suite models
+	testTokens       map[string]*gtsmodel.Token
+	testClients      map[string]*gtsmodel.Client
+	testApplications map[string]*gtsmodel.Application
+	testUsers        map[string]*gtsmodel.User
+	testAccounts     map[string]*gtsmodel.Account
+
+	// module being tested
+	authModule *auth.Module
+}
+
+const (
+	sessionUserID   = "userid"
+	sessionClientID = "client_id"
+)
+
+func (suite *AuthStandardTestSuite) SetupSuite() {
+	suite.testTokens = testrig.NewTestTokens()
+	suite.testClients = testrig.NewTestClients()
+	suite.testApplications = testrig.NewTestApplications()
+	suite.testUsers = testrig.NewTestUsers()
+	suite.testAccounts = testrig.NewTestAccounts()
+}
+
+func (suite *AuthStandardTestSuite) SetupTest() {
+	testrig.InitTestConfig()
+	suite.db = testrig.NewTestDB()
+	testrig.InitTestLog()
+
+	suite.oauthServer = testrig.NewTestOauthServer(suite.db)
+	var err error
+	suite.idp, err = oidc.NewIDP(context.Background())
+	if err != nil {
+		panic(err)
+	}
+	suite.authModule = auth.New(suite.db, suite.oauthServer, suite.idp).(*auth.Module)
+	testrig.StandardDBSetup(suite.db, nil)
+}
+
+func (suite *AuthStandardTestSuite) TearDownTest() {
+	testrig.StandardDBTeardown(suite.db)
+}
+
+func (suite *AuthStandardTestSuite) newContext(requestMethod string, requestPath string) (*gin.Context, *httptest.ResponseRecorder) {
+	// create the recorder and gin test context
+	recorder := httptest.NewRecorder()
+	ctx, engine := gin.CreateTestContext(recorder)
+
+	// load templates into the engine
+	testrig.ConfigureTemplatesWithGin(engine)
+
+	// create the request
+	protocol := viper.GetString(config.Keys.Protocol)
+	host := viper.GetString(config.Keys.Host)
+	baseURI := fmt.Sprintf("%s://%s", protocol, host)
+	requestURI := fmt.Sprintf("%s/%s", baseURI, requestPath)
+	ctx.Request = httptest.NewRequest(requestMethod, requestURI, nil) // the endpoint we're hitting
+	ctx.Request.Header.Set("accept", "text/html")
+
+	// trigger the session middleware on the context
+	store := memstore.NewStore(make([]byte, 32), make([]byte, 32))
+	store.Options(router.SessionOptions())
+	sessionMiddleware := sessions.Sessions("gotosocial-localhost", store)
+	sessionMiddleware(ctx)
+
+	return ctx, recorder
+}

internal/api/client/auth/authorize.go

@@ -44,7 +44,7 @@ func (m *Module) AuthorizeGETHandler(c *gin.Context) {
 	s := sessions.Default(c)
 
 	if _, err := api.NegotiateAccept(c, api.HTMLAcceptHeaders...); err != nil {
-		c.JSON(http.StatusNotAcceptable, gin.H{"error": err.Error()})
+		c.HTML(http.StatusNotAcceptable, "error.tmpl", gin.H{"error": err.Error()})
 		return
 	}
 
@@ -57,7 +57,7 @@ func (m *Module) AuthorizeGETHandler(c *gin.Context) {
 		if err := c.Bind(form); err != nil {
 			l.Debugf("invalid auth form: %s", err)
 			m.clearSession(s)
-			c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+			c.HTML(http.StatusBadRequest, "error.tmpl", gin.H{"error": err.Error()})
 			return
 		}
 		l.Debugf("parsed auth form: %+v", form)
@@ -65,7 +65,7 @@ func (m *Module) AuthorizeGETHandler(c *gin.Context) {
 		if err := extractAuthForm(s, form); err != nil {
 			l.Debugf(fmt.Sprintf("error parsing form at /oauth/authorize: %s", err))
 			m.clearSession(s)
-			c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+			c.HTML(http.StatusBadRequest, "error.tmpl", gin.H{"error": err.Error()})
 			return
 		}
 		c.Redirect(http.StatusSeeOther, AuthSignInPath)
@@ -75,28 +75,33 @@ func (m *Module) AuthorizeGETHandler(c *gin.Context) {
 	// We can use the client_id on the session to retrieve info about the app associated with the client_id
 	clientID, ok := s.Get(sessionClientID).(string)
 	if !ok || clientID == "" {
-		c.JSON(http.StatusInternalServerError, gin.H{"error": "no client_id found in session"})
+		c.HTML(http.StatusInternalServerError, "error.tmpl", gin.H{"error": "no client_id found in session"})
 		return
 	}
 	app := &gtsmodel.Application{}
 	if err := m.db.GetWhere(c.Request.Context(), []db.Where{{Key: sessionClientID, Value: clientID}}, app); err != nil {
 		m.clearSession(s)
-		c.JSON(http.StatusInternalServerError, gin.H{"error": fmt.Sprintf("no application found for client id %s", clientID)})
+		c.HTML(http.StatusInternalServerError, "error.tmpl", gin.H{
+			"error": fmt.Sprintf("no application found for client id %s", clientID),
+		})
 		return
 	}
 
-	// we can also use the userid of the user to fetch their username from the db to greet them nicely <3
+	// redirect the user if they have not confirmed their email yet, thier account has not been approved yet,
+	// or thier account has been disabled.
 	user := &gtsmodel.User{}
 	if err := m.db.GetByID(c.Request.Context(), userID, user); err != nil {
 		m.clearSession(s)
-		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		c.HTML(http.StatusInternalServerError, "error.tmpl", gin.H{"error": err.Error()})
 		return
 	}
-
 	acct, err := m.db.GetAccountByID(c.Request.Context(), user.AccountID)
 	if err != nil {
 		m.clearSession(s)
-		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		c.HTML(http.StatusInternalServerError, "error.tmpl", gin.H{"error": err.Error()})
+		return
+	}
+	if !ensureUserIsAuthorizedOrRedirect(c, user, acct) {
 		return
 	}
 
@@ -104,13 +109,13 @@ func (m *Module) AuthorizeGETHandler(c *gin.Context) {
 	redirect, ok := s.Get(sessionRedirectURI).(string)
 	if !ok || redirect == "" {
 		m.clearSession(s)
-		c.JSON(http.StatusInternalServerError, gin.H{"error": "no redirect_uri found in session"})
+		c.HTML(http.StatusInternalServerError, "error.tmpl", gin.H{"error": "no redirect_uri found in session"})
 		return
 	}
 	scope, ok := s.Get(sessionScope).(string)
 	if !ok || scope == "" {
 		m.clearSession(s)
-		c.JSON(http.StatusInternalServerError, gin.H{"error": "no scope found in session"})
+		c.HTML(http.StatusInternalServerError, "error.tmpl", gin.H{"error": "no scope found in session"})
 		return
 	}
 
@@ -170,10 +175,28 @@ func (m *Module) AuthorizePOSTHandler(c *gin.Context) {
 		errs = append(errs, "session missing userid")
 	}
 
+	// redirect the user if they have not confirmed their email yet, thier account has not been approved yet,
+	// or thier account has been disabled.
+	user := &gtsmodel.User{}
+	if err := m.db.GetByID(c.Request.Context(), userID, user); err != nil {
+		m.clearSession(s)
+		c.HTML(http.StatusInternalServerError, "error.tmpl", gin.H{"error": err.Error()})
+		return
+	}
+	acct, err := m.db.GetAccountByID(c.Request.Context(), user.AccountID)
+	if err != nil {
+		m.clearSession(s)
+		c.HTML(http.StatusInternalServerError, "error.tmpl", gin.H{"error": err.Error()})
+		return
+	}
+	if !ensureUserIsAuthorizedOrRedirect(c, user, acct) {
+		return
+	}
+
 	m.clearSession(s)
 
 	if len(errs) != 0 {
-		c.JSON(http.StatusBadRequest, gin.H{"error": strings.Join(errs, ": ")})
+		c.HTML(http.StatusBadRequest, "error.tmpl", gin.H{"error": strings.Join(errs, ": ")})
 		return
 	}
 
@@ -190,7 +213,7 @@ func (m *Module) AuthorizePOSTHandler(c *gin.Context) {
 
 	// and proceed with authorization using the oauth2 library
 	if err := m.server.HandleAuthorizeRequest(c.Writer, c.Request); err != nil {
-		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+		c.HTML(http.StatusBadRequest, "error.tmpl", gin.H{"error": err.Error()})
 	}
 }
 
@@ -216,3 +239,27 @@ func extractAuthForm(s sessions.Session, form *model.OAuthAuthorize) error {
 	s.Set(sessionState, uuid.NewString())
 	return s.Save()
 }
+
+func ensureUserIsAuthorizedOrRedirect(ctx *gin.Context, user *gtsmodel.User, account *gtsmodel.Account) bool {
+	if user.ConfirmedAt.IsZero() {
+		ctx.Redirect(http.StatusSeeOther, CheckYourEmailPath)
+		return false
+	}
+
+	if !user.Approved {
+		ctx.Redirect(http.StatusSeeOther, WaitForApprovalPath)
+		return false
+	}
+
+	if user.Disabled {
+		ctx.Redirect(http.StatusSeeOther, AccountDisabledPath)
+		return false
+	}
+
+	if !account.SuspendedAt.IsZero() {
+		ctx.Redirect(http.StatusSeeOther, AccountDisabledPath)
+		return false
+	}
+
+	return true
+}

internal/api/client/auth/authorize_test.go

@@ -0,0 +1,113 @@
+package auth_test
+
+import (
+	"context"
+	"fmt"
+	"net/http"
+	"testing"
+	"time"
+
+	"codeberg.org/gruf/go-errors"
+	"github.com/gin-contrib/sessions"
+	"github.com/stretchr/testify/suite"
+	"github.com/superseriousbusiness/gotosocial/internal/api/client/auth"
+	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
+)
+
+type AuthAuthorizeTestSuite struct {
+	AuthStandardTestSuite
+}
+
+type authorizeHandlerTestCase struct {
+	description            string
+	mutateUserAccount      func(*gtsmodel.User, *gtsmodel.Account)
+	expectedStatusCode     int
+	expectedLocationHeader string
+}
+
+func (suite *AuthAuthorizeTestSuite) TestAccountAuthorizeHandler() {
+
+	var tests = []authorizeHandlerTestCase{
+		{
+			description: "user has their email unconfirmed",
+			mutateUserAccount: func(user *gtsmodel.User, account *gtsmodel.Account) {
+				// nothing to do, weed_lord420 already has their email unconfirmed
+			},
+			expectedStatusCode:     http.StatusSeeOther,
+			expectedLocationHeader: auth.CheckYourEmailPath,
+		},
+		{
+			description: "user has their email confirmed but is not approved",
+			mutateUserAccount: func(user *gtsmodel.User, account *gtsmodel.Account) {
+				user.ConfirmedAt = time.Now()
+				user.Email = user.UnconfirmedEmail
+			},
+			expectedStatusCode:     http.StatusSeeOther,
+			expectedLocationHeader: auth.WaitForApprovalPath,
+		},
+		{
+			description: "user has their email confirmed and is approved, but User entity has been disabled",
+			mutateUserAccount: func(user *gtsmodel.User, account *gtsmodel.Account) {
+				user.ConfirmedAt = time.Now()
+				user.Email = user.UnconfirmedEmail
+				user.Approved = true
+				user.Disabled = true
+			},
+			expectedStatusCode:     http.StatusSeeOther,
+			expectedLocationHeader: auth.AccountDisabledPath,
+		},
+		{
+			description: "user has their email confirmed and is approved, but Account entity has been suspended",
+			mutateUserAccount: func(user *gtsmodel.User, account *gtsmodel.Account) {
+				user.ConfirmedAt = time.Now()
+				user.Email = user.UnconfirmedEmail
+				user.Approved = true
+				user.Disabled = false
+				account.SuspendedAt = time.Now()
+			},
+			expectedStatusCode:     http.StatusSeeOther,
+			expectedLocationHeader: auth.AccountDisabledPath,
+		},
+	}
+
+	doTest := func(testCase authorizeHandlerTestCase) {
+		ctx, recorder := suite.newContext(http.MethodGet, auth.OauthAuthorizePath)
+
+		user := suite.testUsers["unconfirmed_account"]
+		account := suite.testAccounts["unconfirmed_account"]
+
+		testSession := sessions.Default(ctx)
+		testSession.Set(sessionUserID, user.ID)
+		testSession.Set(sessionClientID, suite.testApplications["application_1"].ClientID)
+		if err := testSession.Save(); err != nil {
+			panic(errors.WrapMsgf(err, "failed on case: %s", testCase.description))
+		}
+
+		testCase.mutateUserAccount(user, account)
+
+		testCase.description = fmt.Sprintf("%s, %t, %s", user.Email, user.Disabled, account.SuspendedAt)
+
+		user.UpdatedAt = time.Now()
+		err := suite.db.UpdateByPrimaryKey(context.Background(), user)
+		suite.NoError(err)
+		_, err = suite.db.UpdateAccount(context.Background(), account)
+		suite.NoError(err)
+
+		// call the handler
+		suite.authModule.AuthorizeGETHandler(ctx)
+
+		// 1. we should have a redirect
+		suite.Equal(testCase.expectedStatusCode, recorder.Code, fmt.Sprintf("failed on case: %s", testCase.description))
+
+		// 2. we should have a redirect to the check your email path, as this user has not confirmed their email yet.
+		suite.Equal(testCase.expectedLocationHeader, recorder.Header().Get("Location"), fmt.Sprintf("failed on case: %s", testCase.description))
+	}
+
+	for _, testCase := range tests {
+		doTest(testCase)
+	}
+}
+
+func TestAccountUpdateTestSuite(t *testing.T) {
+	suite.Run(t, new(AuthAuthorizeTestSuite))
+}

internal/api/security/tokencheck.go

@@ -62,6 +62,22 @@ func (m *Module) TokenCheck(c *gin.Context) {
 			l.Warnf("no user found for userID %s", userID)
 			return
 		}
+
+		if user.ConfirmedAt.IsZero() {
+			l.Warnf("authenticated user %s has never confirmed thier email address", userID)
+			return
+		}
+
+		if !user.Approved {
+			l.Warnf("authenticated user %s's account was never approved by an admin", userID)
+			return
+		}
+
+		if user.Disabled {
+			l.Warnf("authenticated user %s's account was disabled'", userID)
+			return
+		}
+
 		c.Set(oauth.SessionAuthorizedUser, user)
 
 		// fetch account for this token
@@ -74,6 +90,12 @@ func (m *Module) TokenCheck(c *gin.Context) {
 			l.Warnf("no account found for userID %s", userID)
 			return
 		}
+
+		if !acct.SuspendedAt.IsZero() {
+			l.Warnf("authenticated user %s's account (accountId=%s) has been suspended", userID, user.AccountID)
+			return
+		}
+
 		c.Set(oauth.SessionAuthorizedAccount, acct)
 	}
 

internal/db/bundb/errors.go

@@ -19,7 +19,7 @@ func processPostgresError(err error) db.Error {
 	// (https://www.postgresql.org/docs/10/errcodes-appendix.html)
 	switch pgErr.Code {
 	case "23505" /* unique_violation */ :
-		return db.ErrAlreadyExists
+		return db.NewErrAlreadyExists(pgErr.Message)
 	default:
 		return err
 	}
@@ -36,7 +36,7 @@ func processSQLiteError(err error) db.Error {
 	// Handle supplied error code:
 	switch sqliteErr.Code() {
 	case sqlite3.SQLITE_CONSTRAINT_UNIQUE:
-		return db.ErrAlreadyExists
+		return db.NewErrAlreadyExists(err.Error())
 	default:
 		return err
 	}

internal/db/error.go

@@ -28,8 +28,19 @@
 	ErrNoEntries Error = fmt.Errorf("no entries")
 	// ErrMultipleEntries is returned when a caller expected ONE entry for a query, but multiples were found.
 	ErrMultipleEntries Error = fmt.Errorf("multiple entries")
-	// ErrAlreadyExists is returned when a caller tries to insert a database entry that already exists in the db.
-	ErrAlreadyExists Error = fmt.Errorf("already exists")
 	// ErrUnknown denotes an unknown database error.
 	ErrUnknown Error = fmt.Errorf("unknown error")
 )
+
+// ErrAlreadyExists is returned when a caller tries to insert a database entry that already exists in the db.
+type ErrAlreadyExists struct {
+	message string
+}
+
+func (e *ErrAlreadyExists) Error() string {
+	return e.message
+}
+
+func NewErrAlreadyExists(msg string) error {
+	return &ErrAlreadyExists{message: msg}
+}

internal/federation/dereferencing/attachment.go

@@ -20,6 +20,7 @@
 
 import (
 	"context"
+	"errors"
 	"fmt"
 	"net/url"
 
@@ -60,7 +61,8 @@ func (d *deref) GetRemoteAttachment(ctx context.Context, requestingUsername stri
 	}
 
 	if err := d.db.Put(ctx, a); err != nil {
-		if err != db.ErrAlreadyExists {
+		var alreadyExistsError *db.ErrAlreadyExists
+		if !errors.As(err, &alreadyExistsError) {
 			return nil, fmt.Errorf("GetRemoteAttachment: error inserting attachment: %s", err)
 		}
 	}

internal/federation/federatingdb/create.go

@@ -231,7 +231,8 @@ func (f *federatingDB) createNote(ctx context.Context, note vocab.ActivityStream
 	status.ID = statusID
 
 	if err := f.db.PutStatus(ctx, status); err != nil {
-		if err == db.ErrAlreadyExists {
+		var alreadyExistsError *db.ErrAlreadyExists
+		if errors.As(err, &alreadyExistsError) {
 			// the status already exists in the database, which means we've already handled everything else,
 			// so we can just return nil here and be done with it.
 			return nil

internal/oauth/util.go

@@ -78,25 +78,12 @@ func Authed(c *gin.Context, requireToken bool, requireApp bool, requireUser bool
 		return nil, errors.New("application not supplied")
 	}
 
-	if requireUser {
-		if a.User == nil {
-			return nil, errors.New("user not supplied")
-		}
-		if a.User.Disabled || !a.User.Approved {
-			return nil, errors.New("user disabled or not approved")
-		}
-		if a.User.Email == "" {
-			return nil, errors.New("user has no confirmed email address")
-		}
+	if requireUser && a.User == nil {
+		return nil, errors.New("user not supplied or not authorized")
 	}
 
-	if requireAccount {
-		if a.Account == nil {
-			return nil, errors.New("account not supplied")
-		}
-		if !a.Account.SuspendedAt.IsZero() {
-			return nil, errors.New("account suspended")
-		}
+	if requireAccount && a.Account == nil {
+		return nil, errors.New("account not supplied or not authorized")
 	}
 
 	return a, nil

internal/processing/status/util.go

@@ -223,9 +223,12 @@ func (p *processor) ProcessTags(ctx context.Context, form *apimodel.AdvancedStat
 		return fmt.Errorf("error generating hashtags from status: %s", err)
 	}
 	for _, tag := range gtsTags {
-		if err := p.db.Put(ctx, tag); err != nil && err != db.ErrAlreadyExists {
+		if err := p.db.Put(ctx, tag); err != nil {
+			var alreadyExistsError *db.ErrAlreadyExists
+			if !errors.As(err, &alreadyExistsError) {
 				return fmt.Errorf("error putting tags in db: %s", err)
 			}
+		}
 		tags = append(tags, tag.ID)
 	}
 	// add full populated gts tags to the status for passing them around conveniently

internal/router/router.go

@@ -138,7 +138,7 @@ func New(ctx context.Context, db db.DB) (Router, error) {
 	}
 
 	// set template functions
-	loadTemplateFunctions(engine)
+	LoadTemplateFunctions(engine)
 
 	// load templates onto the engine
 	if err := loadTemplates(engine); err != nil {

internal/router/session.go

@@ -33,8 +33,8 @@
 	"github.com/superseriousbusiness/gotosocial/internal/db"
 )
 
-// sessionOptions returns the standard set of options to use for each session.
-func sessionOptions() sessions.Options {
+// SessionOptions returns the standard set of options to use for each session.
+func SessionOptions() sessions.Options {
 	return sessions.Options{
 		Path:     "/",
 		Domain:   viper.GetString(config.Keys.Host),
@@ -75,7 +75,7 @@ func useSession(ctx context.Context, sessionDB db.Session, engine *gin.Engine) e
 	}
 
 	store := memstore.NewStore(rs.Auth, rs.Crypt)
-	store.Options(sessionOptions())
+	store.Options(SessionOptions())
 
 	sessionName, err := SessionName()
 	if err != nil {

internal/router/template.go

@@ -31,7 +31,7 @@
 	"github.com/superseriousbusiness/gotosocial/internal/config"
 )
 
-// loadTemplates loads html templates for use by the given engine
+// LoadTemplates loads html templates for use by the given engine
 func loadTemplates(engine *gin.Engine) error {
 	cwd, err := os.Getwd()
 	if err != nil {
@@ -39,8 +39,13 @@ func loadTemplates(engine *gin.Engine) error {
 	}
 
 	templateBaseDir := viper.GetString(config.Keys.WebTemplateBaseDir)
-	tmPath := filepath.Join(cwd, fmt.Sprintf("%s*", templateBaseDir))
 
+	_, err = os.Stat(filepath.Join(cwd, templateBaseDir, "index.tmpl"))
+	if err != nil {
+		return fmt.Errorf("%s doesn't seem to contain the templates; index.tmpl is missing: %s", filepath.Join(cwd, templateBaseDir), err)
+	}
+
+	tmPath := filepath.Join(cwd, fmt.Sprintf("%s*", templateBaseDir))
 	engine.LoadHTMLGlob(tmPath)
 	return nil
 }
@@ -87,7 +92,7 @@ func visibilityIcon(visibility model.Visibility) template.HTML {
 	return template.HTML(fmt.Sprintf(`<i aria-label="Visibility: %v" class="fa fa-%v"></i>`, icon.label, icon.faIcon))
 }
 
-func loadTemplateFunctions(engine *gin.Engine) {
+func LoadTemplateFunctions(engine *gin.Engine) {
 	engine.SetFuncMap(template.FuncMap{
 		"noescape":       noescape,
 		"oddOrEven":      oddOrEven,

testrig/router.go

@@ -20,7 +20,14 @@
 
 import (
 	"context"
+	"fmt"
+	"os"
+	"path/filepath"
+	"runtime"
 
+	"github.com/gin-gonic/gin"
+	"github.com/spf13/viper"
+	"github.com/superseriousbusiness/gotosocial/internal/config"
 	"github.com/superseriousbusiness/gotosocial/internal/db"
 	"github.com/superseriousbusiness/gotosocial/internal/router"
 )
@@ -33,3 +40,26 @@ func NewTestRouter(db db.DB) router.Router {
 	}
 	return r
 }
+
+// ConfigureTemplatesWithGin will panic on any errors related to template loading during tests
+func ConfigureTemplatesWithGin(engine *gin.Engine) {
+
+	router.LoadTemplateFunctions(engine)
+
+	// https://stackoverflow.com/questions/31873396/is-it-possible-to-get-the-current-root-of-package-structure-as-a-string-in-golan
+	_, runtimeCallerLocation, _, _ := runtime.Caller(0)
+	projectRoot, err := filepath.Abs(filepath.Join(filepath.Dir(runtimeCallerLocation), "../"))
+	if err != nil {
+		panic(err)
+	}
+
+	templateBaseDir := viper.GetString(config.Keys.WebTemplateBaseDir)
+
+	_, err = os.Stat(filepath.Join(projectRoot, templateBaseDir, "index.tmpl"))
+	if err != nil {
+		panic(fmt.Errorf("%s doesn't seem to contain the templates; index.tmpl is missing: %s", filepath.Join(projectRoot, templateBaseDir), err))
+	}
+
+	tmPath := filepath.Join(projectRoot, fmt.Sprintf("%s*", templateBaseDir))
+	engine.LoadHTMLGlob(tmPath)
+}

web/assets/base.css

@@ -165,6 +165,25 @@ section.login form button {
 			grid-column: 2;
 		}
 
+section.error {
+  display: flex;
+  flex-direction: row;
+  align-items: center;
+}
+section.error span {
+  font-size: 2em;
+}
+section.error pre {
+  border: 1px solid #ff000080;
+  margin-left: 1em;
+  padding: 0 0.7em;
+  border-radius: 0.5em;
+  background-color: #ff000010;
+  font-size: 1.3em;
+  white-space: pre-wrap;
+}
+
+
 input, select, textarea {
 	border: 1px solid #fafaff;
 	color: #fafaff;

web/gotosocial-styling/templates/base.css

@@ -165,6 +165,24 @@ section.login {
 	}
 }
 
+section.error {
+	display: flex;
+	flex-direction: row;
+	align-items: center;
+  span {
+    font-size: 2em;
+  }
+  pre {
+    border: 1px solid #ff000080;
+    margin-left: 1em;
+    padding: 0 0.7em;
+    border-radius: 0.5em;
+    background-color: #ff000010;
+    font-size: 1.3em;
+    white-space: pre-wrap;
+  }
+}
+
 input, select, textarea {
 	border: 1px solid $fg;
 	color: $fg;

web/template/authorize.tmpl

@@ -2,7 +2,13 @@
     <main>
         <form action="/oauth/authorize" method="POST">
             <h1>Hi {{.user}}!</h1>
-            <p>Application <b>{{.appname}}</b> {{if len .appwebsite | eq 0 | not}}({{.appwebsite}}) {{end}}would like to perform actions on your behalf, with scope <em>{{.scope}}</em>.</p>
+            <p>
+              Application <b>{{.appname}}</b> 
+              {{if len .appwebsite | eq 0 | not}}
+                ({{.appwebsite}}) 
+              {{end}}
+              would like to perform actions on your behalf, with scope <em>{{.scope}}</em>.
+            </p>
             <p>The application will redirect to {{.redirect}} to continue.</p>
             <p>
                 <button

web/template/error.tmpl

@@ -0,0 +1,8 @@
+{{ template "header.tmpl" .}}
+    <main>
+        <section class="error">
+          <span>❌</span> <pre>{{.error}}</pre>
+        </section>
+        
+    </main>
+{{ template "footer.tmpl" .}}