df15abd072
Fix #31044 According to [GitHub issue template documentation](https://docs.github.com/en/communities/using-templates-to-encourage-useful-issues-and-pull-requests/syntax-for-githubs-form-schema#attributes-for-dropdown), the `default` attribute can be used to specify the preselected option for a dropdown field. (cherry picked from commit 7ab0988af140aa3e0204979765f75961f1dc9c11)
480 lines
12 KiB
Go
480 lines
12 KiB
Go
// Copyright 2022 The Gitea Authors. All rights reserved.
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// SPDX-License-Identifier: MIT
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package template
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import (
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"fmt"
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"net/url"
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"regexp"
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"strconv"
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"strings"
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"code.gitea.io/gitea/modules/container"
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api "code.gitea.io/gitea/modules/structs"
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"gitea.com/go-chi/binding"
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)
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// Validate checks whether an IssueTemplate is considered valid, and returns the first error
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func Validate(template *api.IssueTemplate) error {
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if err := validateMetadata(template); err != nil {
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return err
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}
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if template.Type() == api.IssueTemplateTypeYaml {
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if err := validateYaml(template); err != nil {
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return err
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}
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}
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return nil
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}
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func validateMetadata(template *api.IssueTemplate) error {
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if strings.TrimSpace(template.Name) == "" {
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return fmt.Errorf("'name' is required")
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}
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if strings.TrimSpace(template.About) == "" {
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return fmt.Errorf("'about' is required")
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}
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return nil
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}
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func validateYaml(template *api.IssueTemplate) error {
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if len(template.Fields) == 0 {
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return fmt.Errorf("'body' is required")
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}
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ids := make(container.Set[string])
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for idx, field := range template.Fields {
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if err := validateID(field, idx, ids); err != nil {
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return err
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}
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if err := validateLabel(field, idx); err != nil {
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return err
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}
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position := newErrorPosition(idx, field.Type)
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switch field.Type {
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case api.IssueFormFieldTypeMarkdown:
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if err := validateStringItem(position, field.Attributes, true, "value"); err != nil {
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return err
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}
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case api.IssueFormFieldTypeTextarea:
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if err := validateStringItem(position, field.Attributes, false,
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"description",
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"placeholder",
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"value",
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"render",
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); err != nil {
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return err
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}
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case api.IssueFormFieldTypeInput:
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if err := validateStringItem(position, field.Attributes, false,
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"description",
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"placeholder",
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"value",
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); err != nil {
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return err
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}
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if err := validateBoolItem(position, field.Validations, "is_number"); err != nil {
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return err
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}
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if err := validateStringItem(position, field.Validations, false, "regex"); err != nil {
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return err
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}
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case api.IssueFormFieldTypeDropdown:
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if err := validateStringItem(position, field.Attributes, false, "description"); err != nil {
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return err
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}
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if err := validateBoolItem(position, field.Attributes, "multiple"); err != nil {
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return err
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}
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if err := validateOptions(field, idx); err != nil {
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return err
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}
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if err := validateDropdownDefault(position, field.Attributes); err != nil {
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return err
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}
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case api.IssueFormFieldTypeCheckboxes:
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if err := validateStringItem(position, field.Attributes, false, "description"); err != nil {
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return err
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}
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if err := validateOptions(field, idx); err != nil {
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return err
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}
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default:
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return position.Errorf("unknown type")
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}
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if err := validateRequired(field, idx); err != nil {
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return err
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}
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}
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return nil
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}
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func validateLabel(field *api.IssueFormField, idx int) error {
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if field.Type == api.IssueFormFieldTypeMarkdown {
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// The label is not required for a markdown field
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return nil
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}
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return validateStringItem(newErrorPosition(idx, field.Type), field.Attributes, true, "label")
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}
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func validateRequired(field *api.IssueFormField, idx int) error {
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if field.Type == api.IssueFormFieldTypeMarkdown || field.Type == api.IssueFormFieldTypeCheckboxes {
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// The label is not required for a markdown or checkboxes field
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return nil
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}
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if err := validateBoolItem(newErrorPosition(idx, field.Type), field.Validations, "required"); err != nil {
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return err
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}
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if required, _ := field.Validations["required"].(bool); required && !field.VisibleOnForm() {
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return newErrorPosition(idx, field.Type).Errorf("can not require a hidden field")
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}
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return nil
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}
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func validateID(field *api.IssueFormField, idx int, ids container.Set[string]) error {
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if field.Type == api.IssueFormFieldTypeMarkdown {
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// The ID is not required for a markdown field
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return nil
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}
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position := newErrorPosition(idx, field.Type)
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if field.ID == "" {
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// If the ID is empty in yaml, template.Unmarshal will auto autofill it, so it cannot be empty
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return position.Errorf("'id' is required")
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}
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if binding.AlphaDashPattern.MatchString(field.ID) {
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return position.Errorf("'id' should contain only alphanumeric, '-' and '_'")
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}
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if !ids.Add(field.ID) {
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return position.Errorf("'id' should be unique")
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}
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return nil
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}
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func validateOptions(field *api.IssueFormField, idx int) error {
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if field.Type != api.IssueFormFieldTypeDropdown && field.Type != api.IssueFormFieldTypeCheckboxes {
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return nil
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}
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position := newErrorPosition(idx, field.Type)
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options, ok := field.Attributes["options"].([]any)
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if !ok || len(options) == 0 {
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return position.Errorf("'options' is required and should be a array")
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}
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for optIdx, option := range options {
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position := newErrorPosition(idx, field.Type, optIdx)
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switch field.Type {
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case api.IssueFormFieldTypeDropdown:
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if _, ok := option.(string); !ok {
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return position.Errorf("should be a string")
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}
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case api.IssueFormFieldTypeCheckboxes:
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opt, ok := option.(map[string]any)
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if !ok {
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return position.Errorf("should be a dictionary")
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}
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if label, ok := opt["label"].(string); !ok || label == "" {
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return position.Errorf("'label' is required and should be a string")
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}
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if visibility, ok := opt["visible"]; ok {
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visibilityList, ok := visibility.([]any)
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if !ok {
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return position.Errorf("'visible' should be list")
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}
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for _, visibleType := range visibilityList {
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visibleType, ok := visibleType.(string)
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if !ok || !(visibleType == "form" || visibleType == "content") {
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return position.Errorf("'visible' list can only contain strings of 'form' and 'content'")
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}
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}
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}
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if required, ok := opt["required"]; ok {
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if _, ok := required.(bool); !ok {
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return position.Errorf("'required' should be a bool")
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}
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// validate if hidden field is required
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if visibility, ok := opt["visible"]; ok {
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visibilityList, _ := visibility.([]any)
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isVisible := false
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for _, v := range visibilityList {
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if vv, _ := v.(string); vv == "form" {
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isVisible = true
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break
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}
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}
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if !isVisible {
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return position.Errorf("can not require a hidden checkbox")
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}
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}
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}
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}
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}
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return nil
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}
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func validateStringItem(position errorPosition, m map[string]any, required bool, names ...string) error {
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for _, name := range names {
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v, ok := m[name]
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if !ok {
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if required {
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return position.Errorf("'%s' is required", name)
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}
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return nil
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}
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attr, ok := v.(string)
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if !ok {
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return position.Errorf("'%s' should be a string", name)
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}
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if strings.TrimSpace(attr) == "" && required {
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return position.Errorf("'%s' is required", name)
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}
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}
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return nil
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}
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func validateBoolItem(position errorPosition, m map[string]any, names ...string) error {
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for _, name := range names {
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v, ok := m[name]
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if !ok {
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return nil
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}
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if _, ok := v.(bool); !ok {
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return position.Errorf("'%s' should be a bool", name)
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}
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}
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return nil
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}
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func validateDropdownDefault(position errorPosition, attributes map[string]any) error {
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v, ok := attributes["default"]
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if !ok {
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return nil
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}
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defaultValue, ok := v.(int)
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if !ok {
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return position.Errorf("'default' should be an int")
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}
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options, ok := attributes["options"].([]any)
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if !ok {
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// should not happen
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return position.Errorf("'options' is required and should be a array")
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}
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if defaultValue < 0 || defaultValue >= len(options) {
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return position.Errorf("the value of 'default' is out of range")
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}
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return nil
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}
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type errorPosition string
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func (p errorPosition) Errorf(format string, a ...any) error {
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return fmt.Errorf(string(p)+": "+format, a...)
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}
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func newErrorPosition(fieldIdx int, fieldType api.IssueFormFieldType, optionIndex ...int) errorPosition {
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ret := fmt.Sprintf("body[%d](%s)", fieldIdx, fieldType)
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if len(optionIndex) > 0 {
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ret += fmt.Sprintf(", option[%d]", optionIndex[0])
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}
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return errorPosition(ret)
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}
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// RenderToMarkdown renders template to markdown with specified values
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func RenderToMarkdown(template *api.IssueTemplate, values url.Values) string {
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builder := &strings.Builder{}
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for _, field := range template.Fields {
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f := &valuedField{
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IssueFormField: field,
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Values: values,
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}
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if f.ID == "" || !f.VisibleInContent() {
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continue
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}
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f.WriteTo(builder)
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}
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return builder.String()
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}
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type valuedField struct {
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*api.IssueFormField
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url.Values
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}
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func (f *valuedField) WriteTo(builder *strings.Builder) {
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// write label
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if !f.HideLabel() {
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_, _ = fmt.Fprintf(builder, "### %s\n\n", f.Label())
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}
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blankPlaceholder := "_No response_\n"
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// write body
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switch f.Type {
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case api.IssueFormFieldTypeCheckboxes:
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for _, option := range f.Options() {
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if !option.VisibleInContent() {
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continue
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}
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checked := " "
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if option.IsChecked() {
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checked = "x"
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}
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_, _ = fmt.Fprintf(builder, "- [%s] %s\n", checked, option.Label())
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}
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case api.IssueFormFieldTypeDropdown:
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var checkeds []string
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for _, option := range f.Options() {
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if option.IsChecked() {
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checkeds = append(checkeds, option.Label())
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}
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}
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if len(checkeds) > 0 {
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_, _ = fmt.Fprintf(builder, "%s\n", strings.Join(checkeds, ", "))
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} else {
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_, _ = fmt.Fprint(builder, blankPlaceholder)
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}
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case api.IssueFormFieldTypeInput:
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if value := f.Value(); value == "" {
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_, _ = fmt.Fprint(builder, blankPlaceholder)
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} else {
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_, _ = fmt.Fprintf(builder, "%s\n", value)
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}
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case api.IssueFormFieldTypeTextarea:
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if value := f.Value(); value == "" {
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_, _ = fmt.Fprint(builder, blankPlaceholder)
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} else if render := f.Render(); render != "" {
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quotes := minQuotes(value)
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_, _ = fmt.Fprintf(builder, "%s%s\n%s\n%s\n", quotes, f.Render(), value, quotes)
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} else {
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_, _ = fmt.Fprintf(builder, "%s\n", value)
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}
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case api.IssueFormFieldTypeMarkdown:
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if value, ok := f.Attributes["value"].(string); ok {
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_, _ = fmt.Fprintf(builder, "%s\n", value)
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}
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}
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_, _ = fmt.Fprintln(builder)
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}
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func (f *valuedField) Label() string {
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if label, ok := f.Attributes["label"].(string); ok {
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return label
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}
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return ""
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}
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func (f *valuedField) HideLabel() bool {
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if f.Type == api.IssueFormFieldTypeMarkdown {
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return true
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}
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if label, ok := f.Attributes["hide_label"].(bool); ok {
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return label
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}
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return false
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}
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func (f *valuedField) Render() string {
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if render, ok := f.Attributes["render"].(string); ok {
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return render
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}
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return ""
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}
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func (f *valuedField) Value() string {
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return strings.TrimSpace(f.Get(fmt.Sprintf("form-field-" + f.ID)))
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}
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func (f *valuedField) Options() []*valuedOption {
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if options, ok := f.Attributes["options"].([]any); ok {
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ret := make([]*valuedOption, 0, len(options))
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for i, option := range options {
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ret = append(ret, &valuedOption{
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index: i,
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data: option,
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field: f,
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})
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}
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return ret
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}
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return nil
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}
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type valuedOption struct {
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index int
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data any
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field *valuedField
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}
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func (o *valuedOption) Label() string {
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switch o.field.Type {
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case api.IssueFormFieldTypeDropdown:
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if label, ok := o.data.(string); ok {
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return label
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}
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case api.IssueFormFieldTypeCheckboxes:
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if vs, ok := o.data.(map[string]any); ok {
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if v, ok := vs["label"].(string); ok {
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return v
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}
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}
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}
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return ""
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}
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func (o *valuedOption) IsChecked() bool {
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switch o.field.Type {
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case api.IssueFormFieldTypeDropdown:
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checks := strings.Split(o.field.Get(fmt.Sprintf("form-field-%s", o.field.ID)), ",")
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idx := strconv.Itoa(o.index)
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for _, v := range checks {
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if v == idx {
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return true
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}
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}
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return false
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case api.IssueFormFieldTypeCheckboxes:
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return o.field.Get(fmt.Sprintf("form-field-%s-%d", o.field.ID, o.index)) == "on"
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}
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return false
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}
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func (o *valuedOption) VisibleInContent() bool {
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if o.field.Type == api.IssueFormFieldTypeCheckboxes {
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if vs, ok := o.data.(map[string]any); ok {
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if vl, ok := vs["visible"].([]any); ok {
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for _, v := range vl {
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if vv, _ := v.(string); vv == "content" {
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return true
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}
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}
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return false
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}
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}
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}
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return true
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}
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var minQuotesRegex = regexp.MustCompilePOSIX("^`{3,}")
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// minQuotes return 3 or more back-quotes.
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// If n back-quotes exists, use n+1 back-quotes to quote.
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func minQuotes(value string) string {
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ret := "```"
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for _, v := range minQuotesRegex.FindAllString(value, -1) {
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if len(v) >= len(ret) {
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ret = v + "`"
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}
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}
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return ret
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}
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