gotosocial/internal/web/customcss.go
Victor Dyotte 9609c4550d
[feature] Add global instance CSS customization setting (#3352)
Allow instance admins to add custom CSS that will affect
every page of their instance.

This is done with a new CustomCSS instance setting that
works pretty much exactly like the Users CustomCSS property.
This custom CSS is then requested for every page load.
User styles/themes take precedence over this CSS.

Co-authored-by: tobi <tobi.smethurst@protonmail.com>
2024-12-02 12:24:48 +01:00

76 lines
2.6 KiB
Go

// GoToSocial
// Copyright (C) GoToSocial Authors admin@gotosocial.org
// SPDX-License-Identifier: AGPL-3.0-or-later
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package web
import (
"net/http"
"github.com/gin-gonic/gin"
apiutil "github.com/superseriousbusiness/gotosocial/internal/api/util"
"github.com/superseriousbusiness/gotosocial/internal/config"
"github.com/superseriousbusiness/gotosocial/internal/gtserror"
)
const textCSSUTF8 = string(apiutil.TextCSS + "; charset=utf-8")
func (m *Module) customCSSGETHandler(c *gin.Context) {
if _, err := apiutil.NegotiateAccept(c, apiutil.TextCSS); err != nil {
apiutil.WebErrorHandler(c, gtserror.NewErrorNotAcceptable(err, err.Error()), m.processor.InstanceGetV1)
return
}
targetUsername, errWithCode := apiutil.ParseUsername(c.Param(apiutil.UsernameKey))
if errWithCode != nil {
apiutil.WebErrorHandler(c, errWithCode, m.processor.InstanceGetV1)
return
}
// Retrieve customCSS if enabled on the instance.
// Else use an empty string, to help with caching
// when custom CSS gets toggled on or off.
var customCSS string
if config.GetAccountsAllowCustomCSS() {
customCSS, errWithCode = m.processor.Account().GetCustomCSSForUsername(c.Request.Context(), targetUsername)
if errWithCode != nil {
apiutil.WebErrorHandler(c, errWithCode, m.processor.InstanceGetV1)
return
}
}
c.Header(cacheControlHeader, cacheControlNoCache)
c.Data(http.StatusOK, textCSSUTF8, []byte(customCSS))
}
func (m *Module) instanceCustomCSSGETHandler(c *gin.Context) {
if _, err := apiutil.NegotiateAccept(c, apiutil.TextCSS); err != nil {
apiutil.WebErrorHandler(c, gtserror.NewErrorNotAcceptable(err, err.Error()), m.processor.InstanceGetV1)
return
}
instanceV1, errWithCode := m.processor.InstanceGetV1(c.Request.Context())
if errWithCode != nil {
apiutil.WebErrorHandler(c, errWithCode, m.processor.InstanceGetV1)
return
}
instanceCustomCSS := instanceV1.CustomCSS
c.Header(cacheControlHeader, cacheControlNoCache)
c.Data(http.StatusOK, textCSSUTF8, []byte(instanceCustomCSS))
}