Jan Dittberner
c2eef9cf7c
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This commit is a refactoring of code that has been located in the main package. We introduce separate packages for the main application, jobs, notifications, and request handlers. Dependencies are injected from the main application, this will make testing easier.
122 lines
3 KiB
Go
122 lines
3 KiB
Go
/*
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Copyright 2017-2022 CAcert Inc.
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SPDX-License-Identifier: Apache-2.0
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package handlers
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import (
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"bytes"
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"fmt"
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"html/template"
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"io/fs"
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"net/http"
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"path/filepath"
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"strings"
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"github.com/Masterminds/sprig/v3"
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"git.cacert.org/cacert-boardvoting/internal/forms"
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"git.cacert.org/cacert-boardvoting/internal/models"
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"git.cacert.org/cacert-boardvoting/ui"
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)
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func checkRole(v *models.User, roles ...models.RoleName) (bool, error) {
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hasRole, err := v.HasRole(roles...)
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if err != nil {
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return false, fmt.Errorf("could not determine user roles: %w", err)
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}
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return hasRole, nil
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}
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type TemplateData struct {
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PrevPage string
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NextPage string
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Motion *models.Motion
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Motions []*models.Motion
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User *models.User
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Users []*models.User
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Request *http.Request
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Flashes []FlashMessage
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Form forms.Form
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ActiveNav topLevelNavItem
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ActiveSubNav subLevelNavItem
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CSRFToken string
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}
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type TemplateCache struct {
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cache map[string]*template.Template
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}
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func NewTemplateCache() (*TemplateCache, error) {
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cache := map[string]*template.Template{}
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pages, err := fs.Glob(ui.Files, "html/pages/*.html")
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if err != nil {
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return nil, fmt.Errorf("could not find page templates: %w", err)
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}
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funcMaps := sprig.FuncMap()
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funcMaps["nl2br"] = func(text string) template.HTML {
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// #nosec G203 input is sanitized
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return template.HTML(strings.ReplaceAll(template.HTMLEscapeString(text), "\n", "<br>"))
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}
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funcMaps["canManageUsers"] = func(v *models.User) (bool, error) {
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return checkRole(v, models.RoleSecretary, models.RoleAdmin)
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}
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funcMaps["canVote"] = func(v *models.User) (bool, error) {
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return checkRole(v, models.RoleVoter)
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}
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funcMaps["canStartVote"] = func(v *models.User) (bool, error) {
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return checkRole(v, models.RoleVoter)
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}
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for _, page := range pages {
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name := filepath.Base(page)
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ts, err := template.New("").Funcs(funcMaps).ParseFS(
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ui.Files,
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"html/base.html",
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"html/partials/*.html",
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page,
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)
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if err != nil {
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return nil, fmt.Errorf("could not parse base template: %w", err)
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}
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cache[name] = ts
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}
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return &TemplateCache{cache: cache}, nil
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}
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func (c *TemplateCache) render(w http.ResponseWriter, status int, page string, data *TemplateData) {
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ts, ok := c.cache[page]
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if !ok {
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panic(fmt.Sprintf("the template %s does not exist", page))
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}
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buf := new(bytes.Buffer)
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err := ts.ExecuteTemplate(buf, "base", data)
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if err != nil {
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panic(err)
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}
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w.WriteHeader(status)
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_, _ = buf.WriteTo(w)
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}
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