gotosocial/internal/api/util/template.go

136 lines
3.2 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 util
import (
"net/http"
"github.com/gin-gonic/gin"
apimodel "github.com/superseriousbusiness/gotosocial/internal/api/model"
)
// WebPage encapsulates variables for
// rendering an HTML template within
// a standard GtS "page" template.
type WebPage struct {
// Name of the template for rendering
// the page. Eg., "example.tmpl".
Template string
// Instance model for rendering header,
// footer, and "about" information.
Instance *apimodel.InstanceV1
// OGMeta for rendering page
// "meta:og*" tags. Can be nil.
OGMeta *OGMeta
// Paths to CSS files to add to
// the page as "stylesheet" entries.
// Can be nil.
Stylesheets []string
// Paths to JS files to add to
// the page as "script" entries.
// Can be nil.
Javascript []string
// Extra parameters to pass to
// the template for rendering,
// eg., "account": *Account etc.
// Can be nil.
Extra map[string]any
}
// TemplateWebPage renders the given HTML template and
// page params within the standard GtS "page" template.
//
// ogMeta, stylesheets, javascript, and any extra
// properties will be provided to the template if
// set, but can all be nil.
func TemplateWebPage(
c *gin.Context,
page WebPage,
) {
obj := map[string]any{
"instance": page.Instance,
"ogMeta": page.OGMeta,
"stylesheets": page.Stylesheets,
"javascript": page.Javascript,
}
for k, v := range page.Extra {
obj[k] = v
}
templatePage(c, page.Template, http.StatusOK, obj)
}
// templateErrorPage renders the given
// HTTP code, error, and request ID
// within the standard error template.
func templateErrorPage(
c *gin.Context,
instance *apimodel.InstanceV1,
code int,
err string,
requestID string,
) {
const errorTmpl = "error.tmpl"
obj := map[string]any{
"instance": instance,
"code": code,
"error": err,
"requestID": requestID,
}
templatePage(c, errorTmpl, code, obj)
}
// template404Page renders
// a standard 404 page.
func template404Page(
c *gin.Context,
instance *apimodel.InstanceV1,
requestID string,
) {
const notFoundTmpl = "404.tmpl"
obj := map[string]any{
"instance": instance,
"requestID": requestID,
}
templatePage(c, notFoundTmpl, http.StatusNotFound, obj)
}
// render the given template inside
// "page.tmpl" with the provided
// code and template object.
func templatePage(
c *gin.Context,
template string,
code int,
obj map[string]any,
) {
const pageTmpl = "page.tmpl"
obj["pageContent"] = template
c.HTML(code, pageTmpl, obj)
}