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gitea/modules/issue/template/template.go

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9.9 KiB
Go

// Copyright 2022 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package template
import (
"fmt"
"net/url"
"regexp"
"strconv"
"strings"
"code.gitea.io/gitea/modules/container"
api "code.gitea.io/gitea/modules/structs"
"gitea.com/go-chi/binding"
)
// Validate checks whether an IssueTemplate is considered valid, and returns the first error
func Validate(template *api.IssueTemplate) error {
if err := validateMetadata(template); err != nil {
return err
}
if template.Type() == api.IssueTemplateTypeYaml {
if err := validateYaml(template); err != nil {
return err
}
}
return nil
}
func validateMetadata(template *api.IssueTemplate) error {
if strings.TrimSpace(template.Name) == "" {
return fmt.Errorf("'name' is required")
}
if strings.TrimSpace(template.About) == "" {
return fmt.Errorf("'about' is required")
}
return nil
}
func validateYaml(template *api.IssueTemplate) error {
if len(template.Fields) == 0 {
return fmt.Errorf("'body' is required")
}
ids := make(container.Set[string])
for idx, field := range template.Fields {
if err := validateID(field, idx, ids); err != nil {
return err
}
if err := validateLabel(field, idx); err != nil {
return err
}
position := newErrorPosition(idx, field.Type)
switch field.Type {
case api.IssueFormFieldTypeMarkdown:
if err := validateStringItem(position, field.Attributes, true, "value"); err != nil {
return err
}
case api.IssueFormFieldTypeTextarea:
if err := validateStringItem(position, field.Attributes, false,
"description",
"placeholder",
"value",
"render",
); err != nil {
return err
}
case api.IssueFormFieldTypeInput:
if err := validateStringItem(position, field.Attributes, false,
"description",
"placeholder",
"value",
); err != nil {
return err
}
if err := validateBoolItem(position, field.Validations, "is_number"); err != nil {
return err
}
if err := validateStringItem(position, field.Validations, false, "regex"); err != nil {
return err
}
case api.IssueFormFieldTypeDropdown:
if err := validateStringItem(position, field.Attributes, false, "description"); err != nil {
return err
}
if err := validateBoolItem(position, field.Attributes, "multiple"); err != nil {
return err
}
if err := validateOptions(field, idx); err != nil {
return err
}
case api.IssueFormFieldTypeCheckboxes:
if err := validateStringItem(position, field.Attributes, false, "description"); err != nil {
return err
}
if err := validateOptions(field, idx); err != nil {
return err
}
default:
return position.Errorf("unknown type")
}
if err := validateRequired(field, idx); err != nil {
return err
}
}
return nil
}
func validateLabel(field *api.IssueFormField, idx int) error {
if field.Type == api.IssueFormFieldTypeMarkdown {
// The label is not required for a markdown field
return nil
}
return validateStringItem(newErrorPosition(idx, field.Type), field.Attributes, true, "label")
}
func validateRequired(field *api.IssueFormField, idx int) error {
if field.Type == api.IssueFormFieldTypeMarkdown || field.Type == api.IssueFormFieldTypeCheckboxes {
// The label is not required for a markdown or checkboxes field
return nil
}
return validateBoolItem(newErrorPosition(idx, field.Type), field.Validations, "required")
}
func validateID(field *api.IssueFormField, idx int, ids container.Set[string]) error {
if field.Type == api.IssueFormFieldTypeMarkdown {
// The ID is not required for a markdown field
return nil
}
position := newErrorPosition(idx, field.Type)
if field.ID == "" {
// If the ID is empty in yaml, template.Unmarshal will auto autofill it, so it cannot be empty
return position.Errorf("'id' is required")
}
if binding.AlphaDashPattern.MatchString(field.ID) {
return position.Errorf("'id' should contain only alphanumeric, '-' and '_'")
}
if !ids.Add(field.ID) {
return position.Errorf("'id' should be unique")
}
return nil
}
func validateOptions(field *api.IssueFormField, idx int) error {
if field.Type != api.IssueFormFieldTypeDropdown && field.Type != api.IssueFormFieldTypeCheckboxes {
return nil
}
position := newErrorPosition(idx, field.Type)
options, ok := field.Attributes["options"].([]interface{})
if !ok || len(options) == 0 {
return position.Errorf("'options' is required and should be a array")
}
for optIdx, option := range options {
position := newErrorPosition(idx, field.Type, optIdx)
switch field.Type {
case api.IssueFormFieldTypeDropdown:
if _, ok := option.(string); !ok {
return position.Errorf("should be a string")
}
case api.IssueFormFieldTypeCheckboxes:
opt, ok := option.(map[string]interface{})
if !ok {
return position.Errorf("should be a dictionary")
}
if label, ok := opt["label"].(string); !ok || label == "" {
return position.Errorf("'label' is required and should be a string")
}
if required, ok := opt["required"]; ok {
if _, ok := required.(bool); !ok {
return position.Errorf("'required' should be a bool")
}
}
}
}
return nil
}
func validateStringItem(position errorPosition, m map[string]interface{}, required bool, names ...string) error {
for _, name := range names {
v, ok := m[name]
if !ok {
if required {
return position.Errorf("'%s' is required", name)
}
return nil
}
attr, ok := v.(string)
if !ok {
return position.Errorf("'%s' should be a string", name)
}
if strings.TrimSpace(attr) == "" && required {
return position.Errorf("'%s' is required", name)
}
}
return nil
}
func validateBoolItem(position errorPosition, m map[string]interface{}, names ...string) error {
for _, name := range names {
v, ok := m[name]
if !ok {
return nil
}
if _, ok := v.(bool); !ok {
return position.Errorf("'%s' should be a bool", name)
}
}
return nil
}
type errorPosition string
func (p errorPosition) Errorf(format string, a ...interface{}) error {
return fmt.Errorf(string(p)+": "+format, a...)
}
func newErrorPosition(fieldIdx int, fieldType api.IssueFormFieldType, optionIndex ...int) errorPosition {
ret := fmt.Sprintf("body[%d](%s)", fieldIdx, fieldType)
if len(optionIndex) > 0 {
ret += fmt.Sprintf(", option[%d]", optionIndex[0])
}
return errorPosition(ret)
}
// RenderToMarkdown renders template to markdown with specified values
func RenderToMarkdown(template *api.IssueTemplate, values url.Values) string {
builder := &strings.Builder{}
for _, field := range template.Fields {
f := &valuedField{
IssueFormField: field,
Values: values,
}
if f.ID == "" {
continue
}
f.WriteTo(builder)
}
return builder.String()
}
type valuedField struct {
*api.IssueFormField
url.Values
}
func (f *valuedField) WriteTo(builder *strings.Builder) {
if f.Type == api.IssueFormFieldTypeMarkdown {
// markdown blocks do not appear in output
return
}
// write label
_, _ = fmt.Fprintf(builder, "### %s\n\n", f.Label())
blankPlaceholder := "_No response_\n"
// write body
switch f.Type {
case api.IssueFormFieldTypeCheckboxes:
for _, option := range f.Options() {
checked := " "
if option.IsChecked() {
checked = "x"
}
_, _ = fmt.Fprintf(builder, "- [%s] %s\n", checked, option.Label())
}
case api.IssueFormFieldTypeDropdown:
var checkeds []string
for _, option := range f.Options() {
if option.IsChecked() {
checkeds = append(checkeds, option.Label())
}
}
if len(checkeds) > 0 {
_, _ = fmt.Fprintf(builder, "%s\n", strings.Join(checkeds, ", "))
} else {
_, _ = fmt.Fprint(builder, blankPlaceholder)
}
case api.IssueFormFieldTypeInput:
if value := f.Value(); value == "" {
_, _ = fmt.Fprint(builder, blankPlaceholder)
} else {
_, _ = fmt.Fprintf(builder, "%s\n", value)
}
case api.IssueFormFieldTypeTextarea:
if value := f.Value(); value == "" {
_, _ = fmt.Fprint(builder, blankPlaceholder)
} else if render := f.Render(); render != "" {
quotes := minQuotes(value)
_, _ = fmt.Fprintf(builder, "%s%s\n%s\n%s\n", quotes, f.Render(), value, quotes)
} else {
_, _ = fmt.Fprintf(builder, "%s\n", value)
}
}
_, _ = fmt.Fprintln(builder)
}
func (f *valuedField) Label() string {
if label, ok := f.Attributes["label"].(string); ok {
return label
}
return ""
}
func (f *valuedField) Render() string {
if render, ok := f.Attributes["render"].(string); ok {
return render
}
return ""
}
func (f *valuedField) Value() string {
return strings.TrimSpace(f.Get(fmt.Sprintf("form-field-" + f.ID)))
}
func (f *valuedField) Options() []*valuedOption {
if options, ok := f.Attributes["options"].([]interface{}); ok {
ret := make([]*valuedOption, 0, len(options))
for i, option := range options {
ret = append(ret, &valuedOption{
index: i,
data: option,
field: f,
})
}
return ret
}
return nil
}
type valuedOption struct {
index int
data interface{}
field *valuedField
}
func (o *valuedOption) Label() string {
switch o.field.Type {
case api.IssueFormFieldTypeDropdown:
if label, ok := o.data.(string); ok {
return label
}
case api.IssueFormFieldTypeCheckboxes:
if vs, ok := o.data.(map[string]interface{}); ok {
if v, ok := vs["label"].(string); ok {
return v
}
}
}
return ""
}
func (o *valuedOption) IsChecked() bool {
switch o.field.Type {
case api.IssueFormFieldTypeDropdown:
checks := strings.Split(o.field.Get(fmt.Sprintf("form-field-%s", o.field.ID)), ",")
idx := strconv.Itoa(o.index)
for _, v := range checks {
if v == idx {
return true
}
}
return false
case api.IssueFormFieldTypeCheckboxes:
return o.field.Get(fmt.Sprintf("form-field-%s-%d", o.field.ID, o.index)) == "on"
}
return false
}
var minQuotesRegex = regexp.MustCompilePOSIX("^`{3,}")
// minQuotes return 3 or more back-quotes.
// If n back-quotes exists, use n+1 back-quotes to quote.
func minQuotes(value string) string {
ret := "```"
for _, v := range minQuotesRegex.FindAllString(value, -1) {
if len(v) >= len(ret) {
ret = v + "`"
}
}
return ret
}