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508 lines
12 KiB
Go
508 lines
12 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 main
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import (
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"bytes"
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"database/sql"
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"errors"
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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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"time"
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"github.com/Masterminds/sprig/v3"
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"github.com/gorilla/csrf"
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"github.com/julienschmidt/httprouter"
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"git.cacert.org/cacert-boardvoting/internal/models"
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"git.cacert.org/cacert-boardvoting/internal/validator"
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"git.cacert.org/cacert-boardvoting/ui"
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)
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func checkRole(v *models.User, roles []string) (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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func newTemplateCache() (map[string]*template.Template, 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, []string{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, []string{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, []string{models.RoleVoter})
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}
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funcMaps[csrf.TemplateTag] = csrf.TemplateField
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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 cache, nil
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}
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type topLevelNavItem string
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type subLevelNavItem string
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const (
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topLevelNavMotions topLevelNavItem = "motions"
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topLevelNavUsers topLevelNavItem = "users"
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subLevelNavMotionsAll subLevelNavItem = "all-motions"
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subLevelNavMotionsUnvoted subLevelNavItem = "unvoted-motions"
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subLevelNavUsers subLevelNavItem = "users"
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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.MotionForDisplay
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Motions []*models.MotionForDisplay
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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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Flash string
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Form any
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ActiveNav topLevelNavItem
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ActiveSubNav subLevelNavItem
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}
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func (app *application) newTemplateData(
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r *http.Request,
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nav topLevelNavItem,
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subNav subLevelNavItem,
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) *templateData {
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user, err := app.GetUser(r)
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if err != nil {
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app.errorLog.Printf("error getting user for template data: %v", err)
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}
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return &templateData{
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Request: r,
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User: user,
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ActiveNav: nav,
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ActiveSubNav: subNav,
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Flash: app.sessionManager.PopString(r.Context(), "flash"),
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}
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}
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func (app *application) render(w http.ResponseWriter, status int, page string, data *templateData) {
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ts, ok := app.templateCache[page]
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if !ok {
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app.serverError(w, fmt.Errorf("the template %s does not exist", page))
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return
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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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app.serverError(w, err)
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return
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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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func (m *templateData) motionPaginationOptions(limit int, first, last *time.Time) error {
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motions := m.Motions
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if len(motions) == limit && first.Before(motions[len(motions)-1].Proposed) {
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marshalled, err := motions[len(motions)-1].Proposed.MarshalText()
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if err != nil {
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return fmt.Errorf("could not serialize timestamp: %w", err)
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}
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m.NextPage = string(marshalled)
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}
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if len(motions) > 0 && last.After(motions[0].Proposed) {
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marshalled, err := motions[0].Proposed.MarshalText()
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if err != nil {
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return fmt.Errorf("could not serialize timestamp: %w", err)
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}
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m.PrevPage = string(marshalled)
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}
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return nil
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}
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func (app *application) motionList(w http.ResponseWriter, r *http.Request) {
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if r.URL.Path != "/motions/" {
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app.notFound(w)
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return
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}
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var (
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listOptions *models.MotionListOptions
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err error
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)
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listOptions, err = app.calculateMotionListOptions(r)
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if err != nil {
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app.clientError(w, http.StatusBadRequest)
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return
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}
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ctx := r.Context()
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motions, err := app.motions.GetMotions(ctx, listOptions)
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if err != nil {
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app.serverError(w, err)
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return
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}
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first, last, err := app.motions.TimestampRange(ctx, listOptions)
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if err != nil {
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app.serverError(w, err)
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return
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}
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templateData := app.newTemplateData(r, "motions", "all-motions")
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if listOptions.UnvotedOnly {
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templateData.ActiveSubNav = subLevelNavMotionsUnvoted
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}
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templateData.Motions = motions
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err = templateData.motionPaginationOptions(listOptions.Limit, first, last)
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if err != nil {
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app.serverError(w, err)
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return
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}
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app.render(w, http.StatusOK, "motions.html", templateData)
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}
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func (app *application) calculateMotionListOptions(r *http.Request) (*models.MotionListOptions, error) {
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const (
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queryParamBefore = "before"
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queryParamAfter = "after"
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queryParamUnvoted = "unvoted"
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motionsPerPage = 10
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)
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listOptions := &models.MotionListOptions{Limit: motionsPerPage}
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if r.URL.Query().Has(queryParamAfter) {
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var after time.Time
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err := after.UnmarshalText([]byte(r.URL.Query().Get(queryParamAfter)))
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if err != nil {
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return nil, fmt.Errorf("could not unmarshal timestamp: %w", err)
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}
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listOptions.After = &after
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} else if r.URL.Query().Has(queryParamBefore) {
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var before time.Time
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err := before.UnmarshalText([]byte(r.URL.Query().Get(queryParamBefore)))
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if err != nil {
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return nil, fmt.Errorf("could not unmarshal timestamp: %w", err)
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}
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listOptions.Before = &before
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}
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if r.URL.Query().Has(queryParamUnvoted) {
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listOptions.UnvotedOnly = true
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voter, err := app.GetUser(r)
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if err != nil {
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return nil, fmt.Errorf("could not get voter: %w", err)
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}
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if voter != nil {
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listOptions.VoterID = voter.ID
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}
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}
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return listOptions, nil
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}
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func (app *application) motionDetails(w http.ResponseWriter, r *http.Request) {
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params := httprouter.ParamsFromContext(r.Context())
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tag := params.ByName("tag")
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showVotes := r.URL.Query().Has("showvotes")
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motion, err := app.motions.GetMotionByTag(r.Context(), tag, showVotes)
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if err != nil && !errors.Is(err, sql.ErrNoRows) {
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app.serverError(w, err)
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return
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}
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if motion == nil {
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app.notFound(w)
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return
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}
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data := app.newTemplateData(r, topLevelNavMotions, subLevelNavMotionsAll)
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data.Motion = motion
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app.render(w, http.StatusOK, "motion.html", data)
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}
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type NewMotionForm struct {
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Title string `form:"title"`
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Content string `form:"content"`
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Type *models.VoteType `form:"type"`
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Due int `form:"due"`
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User *models.User `form:"-"`
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validator.Validator `form:"-"`
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}
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func (app *application) newMotionForm(w http.ResponseWriter, r *http.Request) {
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data := app.newTemplateData(r, "motions", "all-motions")
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data.Form = &NewMotionForm{
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User: data.User,
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Type: models.VoteTypeMotion,
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}
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app.render(w, http.StatusOK, "create_motion.html", data)
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}
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func (form *NewMotionForm) Validate() {
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const (
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minimumTitleLength = 3
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maximumTitleLength = 200
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minimumContentLength = 3
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maximumContentLength = 8000
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threeDays = 3
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oneWeek = 7
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twoWeeks = 14
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threeWeeks = 28
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)
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form.CheckField(
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validator.NotBlank(form.Title),
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"title",
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"This field cannot be blank",
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)
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form.CheckField(
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validator.MinChars(form.Title, minimumTitleLength),
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"title",
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fmt.Sprintf("This field must be at least %d characters long", minimumTitleLength),
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)
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form.CheckField(
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validator.MaxChars(form.Title, maximumTitleLength),
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"title",
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fmt.Sprintf("This field must be at most %d characters long", maximumTitleLength),
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)
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form.CheckField(
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validator.NotBlank(form.Content),
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"content",
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"This field cannot be blank",
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)
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form.CheckField(
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validator.MinChars(form.Content, minimumContentLength),
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"content",
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fmt.Sprintf("This field must be at least %d characters long", minimumContentLength),
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)
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form.CheckField(
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validator.MaxChars(form.Content, maximumContentLength),
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"content",
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fmt.Sprintf("This field must be at most %d characters long", maximumContentLength),
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)
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form.CheckField(validator.PermittedInt(
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form.Due, threeDays, oneWeek, twoWeeks, threeWeeks), "due", "invalid duration choice",
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)
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}
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func (app *application) newMotionSubmit(w http.ResponseWriter, r *http.Request) {
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const hoursInDay = 24
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var form NewMotionForm
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err := app.decodePostForm(r, &form)
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if err != nil {
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app.clientError(w, http.StatusBadRequest)
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return
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}
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form.Validate()
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if !form.Valid() {
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form.User = &models.User{}
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data := app.newTemplateData(r, topLevelNavMotions, subLevelNavMotionsAll)
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data.Form = form
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app.render(w, http.StatusUnprocessableEntity, "create_motion.html", data)
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return
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}
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user, err := app.GetUser(r)
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if err != nil {
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app.clientError(w, http.StatusUnauthorized)
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return
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}
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now := time.Now().UTC()
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dueDuration := time.Duration(form.Due) * hoursInDay * time.Hour
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decisionID, err := app.motions.Create(
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r.Context(),
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user,
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form.Type,
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form.Title,
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form.Content,
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now,
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now.Add(dueDuration),
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)
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if err != nil {
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app.serverError(w, err)
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return
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}
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decision, err := app.motions.GetByID(r.Context(), decisionID)
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if err != nil {
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app.serverError(w, err)
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return
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}
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app.mailNotifier.notifyChannel <- &NewDecisionNotification{
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decision: &models.NewMotion{Decision: decision, Proposer: user},
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}
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app.sessionManager.Put(r.Context(), "flash", fmt.Sprintf("Started new motion %s: %s", decision.Tag, decision.Title))
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http.Redirect(w, r, fmt.Sprintf("/motions/%s", decision.Tag), http.StatusSeeOther)
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}
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func (app *application) editMotionForm(_ http.ResponseWriter, _ *http.Request) {
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panic("not implemented")
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}
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func (app *application) editMotionSubmit(_ http.ResponseWriter, _ *http.Request) {
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panic("not implemented")
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}
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func (app *application) withdrawMotionForm(_ http.ResponseWriter, _ *http.Request) {
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panic("not implemented")
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}
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func (app *application) withdrawMotionSubmit(_ http.ResponseWriter, _ *http.Request) {
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panic("not implemented")
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}
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func (app *application) voteForm(_ http.ResponseWriter, _ *http.Request) {
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panic("not implemented")
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}
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func (app *application) voteSubmit(_ http.ResponseWriter, _ *http.Request) {
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panic("not implemented")
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}
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func (app *application) proxyVoteForm(_ http.ResponseWriter, _ *http.Request) {
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panic("not implemented")
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}
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func (app *application) proxyVoteSubmit(_ http.ResponseWriter, _ *http.Request) {
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panic("not implemented")
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}
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func (app *application) userList(w http.ResponseWriter, r *http.Request) {
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data := app.newTemplateData(r, topLevelNavUsers, subLevelNavUsers)
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app.render(w, http.StatusOK, "users.html", data)
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}
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func (app *application) submitUserRoles(_ http.ResponseWriter, _ *http.Request) {
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panic("not implemented")
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}
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func (app *application) editUserForm(_ http.ResponseWriter, _ *http.Request) {
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panic("not implemented")
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}
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func (app *application) editUserSubmit(_ http.ResponseWriter, _ *http.Request) {
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panic("not implemented")
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}
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func (app *application) userAddEmailForm(_ http.ResponseWriter, _ *http.Request) {
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panic("not implemented")
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}
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func (app *application) userAddEmailSubmit(_ http.ResponseWriter, _ *http.Request) {
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panic("not implemented")
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}
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func (app *application) deleteUserForm(_ http.ResponseWriter, _ *http.Request) {
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panic("not implemented")
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}
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func (app *application) deleteUserSubmit(_ http.ResponseWriter, _ *http.Request) {
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panic("not implemented")
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}
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