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authorWim <wim@42.be>2020-08-10 00:29:54 +0200
committerGitHub <noreply@github.com>2020-08-10 00:29:54 +0200
commit4e50fd864921c556988c919269448efdb90fa961 (patch)
treea3625f03f8de3c4f3841364000a4ea3aa42c1533 /vendor/github.com/mattermost/mattermost-server/v5/model/post.go
parentdfdffa0027334e55ce213fc6eb62206dbf48baf6 (diff)
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Use mattermost v5 module (#1192)
Diffstat (limited to 'vendor/github.com/mattermost/mattermost-server/v5/model/post.go')
-rw-r--r--vendor/github.com/mattermost/mattermost-server/v5/model/post.go663
1 files changed, 663 insertions, 0 deletions
diff --git a/vendor/github.com/mattermost/mattermost-server/v5/model/post.go b/vendor/github.com/mattermost/mattermost-server/v5/model/post.go
new file mode 100644
index 00000000..817ca08a
--- /dev/null
+++ b/vendor/github.com/mattermost/mattermost-server/v5/model/post.go
@@ -0,0 +1,663 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+package model
+
+import (
+ "encoding/json"
+ "errors"
+ "io"
+ "net/http"
+ "regexp"
+ "sort"
+ "strings"
+ "sync"
+ "unicode/utf8"
+
+ "github.com/mattermost/mattermost-server/v5/utils/markdown"
+)
+
+const (
+ POST_SYSTEM_MESSAGE_PREFIX = "system_"
+ POST_DEFAULT = ""
+ POST_SLACK_ATTACHMENT = "slack_attachment"
+ POST_SYSTEM_GENERIC = "system_generic"
+ POST_JOIN_LEAVE = "system_join_leave" // Deprecated, use POST_JOIN_CHANNEL or POST_LEAVE_CHANNEL instead
+ POST_JOIN_CHANNEL = "system_join_channel"
+ POST_GUEST_JOIN_CHANNEL = "system_guest_join_channel"
+ POST_LEAVE_CHANNEL = "system_leave_channel"
+ POST_JOIN_TEAM = "system_join_team"
+ POST_LEAVE_TEAM = "system_leave_team"
+ POST_AUTO_RESPONDER = "system_auto_responder"
+ POST_ADD_REMOVE = "system_add_remove" // Deprecated, use POST_ADD_TO_CHANNEL or POST_REMOVE_FROM_CHANNEL instead
+ POST_ADD_TO_CHANNEL = "system_add_to_channel"
+ POST_ADD_GUEST_TO_CHANNEL = "system_add_guest_to_chan"
+ POST_REMOVE_FROM_CHANNEL = "system_remove_from_channel"
+ POST_MOVE_CHANNEL = "system_move_channel"
+ POST_ADD_TO_TEAM = "system_add_to_team"
+ POST_REMOVE_FROM_TEAM = "system_remove_from_team"
+ POST_HEADER_CHANGE = "system_header_change"
+ POST_DISPLAYNAME_CHANGE = "system_displayname_change"
+ POST_CONVERT_CHANNEL = "system_convert_channel"
+ POST_PURPOSE_CHANGE = "system_purpose_change"
+ POST_CHANNEL_DELETED = "system_channel_deleted"
+ POST_CHANNEL_RESTORED = "system_channel_restored"
+ POST_EPHEMERAL = "system_ephemeral"
+ POST_CHANGE_CHANNEL_PRIVACY = "system_change_chan_privacy"
+ POST_ADD_BOT_TEAMS_CHANNELS = "add_bot_teams_channels"
+ POST_FILEIDS_MAX_RUNES = 150
+ POST_FILENAMES_MAX_RUNES = 4000
+ POST_HASHTAGS_MAX_RUNES = 1000
+ POST_MESSAGE_MAX_RUNES_V1 = 4000
+ POST_MESSAGE_MAX_BYTES_V2 = 65535 // Maximum size of a TEXT column in MySQL
+ POST_MESSAGE_MAX_RUNES_V2 = POST_MESSAGE_MAX_BYTES_V2 / 4 // Assume a worst-case representation
+ POST_PROPS_MAX_RUNES = 8000
+ POST_PROPS_MAX_USER_RUNES = POST_PROPS_MAX_RUNES - 400 // Leave some room for system / pre-save modifications
+ POST_CUSTOM_TYPE_PREFIX = "custom_"
+ POST_ME = "me"
+ PROPS_ADD_CHANNEL_MEMBER = "add_channel_member"
+
+ POST_PROPS_ADDED_USER_ID = "addedUserId"
+ POST_PROPS_DELETE_BY = "deleteBy"
+ POST_PROPS_OVERRIDE_ICON_URL = "override_icon_url"
+ POST_PROPS_OVERRIDE_ICON_EMOJI = "override_icon_emoji"
+
+ POST_PROPS_MENTION_HIGHLIGHT_DISABLED = "mentionHighlightDisabled"
+ POST_PROPS_GROUP_HIGHLIGHT_DISABLED = "disable_group_highlight"
+)
+
+var AT_MENTION_PATTEN = regexp.MustCompile(`\B@`)
+
+type Post struct {
+ Id string `json:"id"`
+ CreateAt int64 `json:"create_at"`
+ UpdateAt int64 `json:"update_at"`
+ EditAt int64 `json:"edit_at"`
+ DeleteAt int64 `json:"delete_at"`
+ IsPinned bool `json:"is_pinned"`
+ UserId string `json:"user_id"`
+ ChannelId string `json:"channel_id"`
+ RootId string `json:"root_id"`
+ ParentId string `json:"parent_id"`
+ OriginalId string `json:"original_id"`
+
+ Message string `json:"message"`
+ // MessageSource will contain the message as submitted by the user if Message has been modified
+ // by Mattermost for presentation (e.g if an image proxy is being used). It should be used to
+ // populate edit boxes if present.
+ MessageSource string `json:"message_source,omitempty" db:"-"`
+
+ Type string `json:"type"`
+ propsMu sync.RWMutex `db:"-"` // Unexported mutex used to guard Post.Props.
+ Props StringInterface `json:"props"` // Deprecated: use GetProps()
+ Hashtags string `json:"hashtags"`
+ Filenames StringArray `json:"filenames,omitempty"` // Deprecated, do not use this field any more
+ FileIds StringArray `json:"file_ids,omitempty"`
+ PendingPostId string `json:"pending_post_id" db:"-"`
+ HasReactions bool `json:"has_reactions,omitempty"`
+
+ // Transient data populated before sending a post to the client
+ ReplyCount int64 `json:"reply_count" db:"-"`
+ Metadata *PostMetadata `json:"metadata,omitempty" db:"-"`
+}
+
+type PostEphemeral struct {
+ UserID string `json:"user_id"`
+ Post *Post `json:"post"`
+}
+
+type PostPatch struct {
+ IsPinned *bool `json:"is_pinned"`
+ Message *string `json:"message"`
+ Props *StringInterface `json:"props"`
+ FileIds *StringArray `json:"file_ids"`
+ HasReactions *bool `json:"has_reactions"`
+}
+
+type SearchParameter struct {
+ Terms *string `json:"terms"`
+ IsOrSearch *bool `json:"is_or_search"`
+ TimeZoneOffset *int `json:"time_zone_offset"`
+ Page *int `json:"page"`
+ PerPage *int `json:"per_page"`
+ IncludeDeletedChannels *bool `json:"include_deleted_channels"`
+}
+
+type AnalyticsPostCountsOptions struct {
+ TeamId string
+ BotsOnly bool
+ YesterdayOnly bool
+}
+
+func (o *PostPatch) WithRewrittenImageURLs(f func(string) string) *PostPatch {
+ copy := *o
+ if copy.Message != nil {
+ *copy.Message = RewriteImageURLs(*o.Message, f)
+ }
+ return &copy
+}
+
+type PostForExport struct {
+ Post
+ TeamName string
+ ChannelName string
+ Username string
+ ReplyCount int
+}
+
+type DirectPostForExport struct {
+ Post
+ User string
+ ChannelMembers *[]string
+}
+
+type ReplyForExport struct {
+ Post
+ Username string
+}
+
+type PostForIndexing struct {
+ Post
+ TeamId string `json:"team_id"`
+ ParentCreateAt *int64 `json:"parent_create_at"`
+}
+
+// ShallowCopy is an utility function to shallow copy a Post to the given
+// destination without touching the internal RWMutex.
+func (o *Post) ShallowCopy(dst *Post) error {
+ if dst == nil {
+ return errors.New("dst cannot be nil")
+ }
+ o.propsMu.RLock()
+ defer o.propsMu.RUnlock()
+ dst.propsMu.Lock()
+ defer dst.propsMu.Unlock()
+ dst.Id = o.Id
+ dst.CreateAt = o.CreateAt
+ dst.UpdateAt = o.UpdateAt
+ dst.EditAt = o.EditAt
+ dst.DeleteAt = o.DeleteAt
+ dst.IsPinned = o.IsPinned
+ dst.UserId = o.UserId
+ dst.ChannelId = o.ChannelId
+ dst.RootId = o.RootId
+ dst.ParentId = o.ParentId
+ dst.OriginalId = o.OriginalId
+ dst.Message = o.Message
+ dst.MessageSource = o.MessageSource
+ dst.Type = o.Type
+ dst.Props = o.Props
+ dst.Hashtags = o.Hashtags
+ dst.Filenames = o.Filenames
+ dst.FileIds = o.FileIds
+ dst.PendingPostId = o.PendingPostId
+ dst.HasReactions = o.HasReactions
+ dst.ReplyCount = o.ReplyCount
+ dst.Metadata = o.Metadata
+ return nil
+}
+
+// Clone shallowly copies the post and returns the copy.
+func (o *Post) Clone() *Post {
+ copy := &Post{}
+ o.ShallowCopy(copy)
+ return copy
+}
+
+func (o *Post) ToJson() string {
+ copy := o.Clone()
+ copy.StripActionIntegrations()
+ b, _ := json.Marshal(copy)
+ return string(b)
+}
+
+func (o *Post) ToUnsanitizedJson() string {
+ b, _ := json.Marshal(o)
+ return string(b)
+}
+
+type GetPostsSinceOptions struct {
+ ChannelId string
+ Time int64
+ SkipFetchThreads bool
+}
+
+type GetPostsOptions struct {
+ ChannelId string
+ PostId string
+ Page int
+ PerPage int
+ SkipFetchThreads bool
+}
+
+func PostFromJson(data io.Reader) *Post {
+ var o *Post
+ json.NewDecoder(data).Decode(&o)
+ return o
+}
+
+func (o *Post) Etag() string {
+ return Etag(o.Id, o.UpdateAt)
+}
+
+func (o *Post) IsValid(maxPostSize int) *AppError {
+ if !IsValidId(o.Id) {
+ return NewAppError("Post.IsValid", "model.post.is_valid.id.app_error", nil, "", http.StatusBadRequest)
+ }
+
+ if o.CreateAt == 0 {
+ return NewAppError("Post.IsValid", "model.post.is_valid.create_at.app_error", nil, "id="+o.Id, http.StatusBadRequest)
+ }
+
+ if o.UpdateAt == 0 {
+ return NewAppError("Post.IsValid", "model.post.is_valid.update_at.app_error", nil, "id="+o.Id, http.StatusBadRequest)
+ }
+
+ if !IsValidId(o.UserId) {
+ return NewAppError("Post.IsValid", "model.post.is_valid.user_id.app_error", nil, "", http.StatusBadRequest)
+ }
+
+ if !IsValidId(o.ChannelId) {
+ return NewAppError("Post.IsValid", "model.post.is_valid.channel_id.app_error", nil, "", http.StatusBadRequest)
+ }
+
+ if !(IsValidId(o.RootId) || len(o.RootId) == 0) {
+ return NewAppError("Post.IsValid", "model.post.is_valid.root_id.app_error", nil, "", http.StatusBadRequest)
+ }
+
+ if !(IsValidId(o.ParentId) || len(o.ParentId) == 0) {
+ return NewAppError("Post.IsValid", "model.post.is_valid.parent_id.app_error", nil, "", http.StatusBadRequest)
+ }
+
+ if len(o.ParentId) == 26 && len(o.RootId) == 0 {
+ return NewAppError("Post.IsValid", "model.post.is_valid.root_parent.app_error", nil, "", http.StatusBadRequest)
+ }
+
+ if !(len(o.OriginalId) == 26 || len(o.OriginalId) == 0) {
+ return NewAppError("Post.IsValid", "model.post.is_valid.original_id.app_error", nil, "", http.StatusBadRequest)
+ }
+
+ if utf8.RuneCountInString(o.Message) > maxPostSize {
+ return NewAppError("Post.IsValid", "model.post.is_valid.msg.app_error", nil, "id="+o.Id, http.StatusBadRequest)
+ }
+
+ if utf8.RuneCountInString(o.Hashtags) > POST_HASHTAGS_MAX_RUNES {
+ return NewAppError("Post.IsValid", "model.post.is_valid.hashtags.app_error", nil, "id="+o.Id, http.StatusBadRequest)
+ }
+
+ switch o.Type {
+ case
+ POST_DEFAULT,
+ POST_SYSTEM_GENERIC,
+ POST_JOIN_LEAVE,
+ POST_AUTO_RESPONDER,
+ POST_ADD_REMOVE,
+ POST_JOIN_CHANNEL,
+ POST_GUEST_JOIN_CHANNEL,
+ POST_LEAVE_CHANNEL,
+ POST_JOIN_TEAM,
+ POST_LEAVE_TEAM,
+ POST_ADD_TO_CHANNEL,
+ POST_ADD_GUEST_TO_CHANNEL,
+ POST_REMOVE_FROM_CHANNEL,
+ POST_MOVE_CHANNEL,
+ POST_ADD_TO_TEAM,
+ POST_REMOVE_FROM_TEAM,
+ POST_SLACK_ATTACHMENT,
+ POST_HEADER_CHANGE,
+ POST_PURPOSE_CHANGE,
+ POST_DISPLAYNAME_CHANGE,
+ POST_CONVERT_CHANNEL,
+ POST_CHANNEL_DELETED,
+ POST_CHANNEL_RESTORED,
+ POST_CHANGE_CHANNEL_PRIVACY,
+ POST_ME,
+ POST_ADD_BOT_TEAMS_CHANNELS:
+ default:
+ if !strings.HasPrefix(o.Type, POST_CUSTOM_TYPE_PREFIX) {
+ return NewAppError("Post.IsValid", "model.post.is_valid.type.app_error", nil, "id="+o.Type, http.StatusBadRequest)
+ }
+ }
+
+ if utf8.RuneCountInString(ArrayToJson(o.Filenames)) > POST_FILENAMES_MAX_RUNES {
+ return NewAppError("Post.IsValid", "model.post.is_valid.filenames.app_error", nil, "id="+o.Id, http.StatusBadRequest)
+ }
+
+ if utf8.RuneCountInString(ArrayToJson(o.FileIds)) > POST_FILEIDS_MAX_RUNES {
+ return NewAppError("Post.IsValid", "model.post.is_valid.file_ids.app_error", nil, "id="+o.Id, http.StatusBadRequest)
+ }
+
+ if utf8.RuneCountInString(StringInterfaceToJson(o.GetProps())) > POST_PROPS_MAX_RUNES {
+ return NewAppError("Post.IsValid", "model.post.is_valid.props.app_error", nil, "id="+o.Id, http.StatusBadRequest)
+ }
+
+ return nil
+}
+
+func (o *Post) SanitizeProps() {
+ membersToSanitize := []string{
+ PROPS_ADD_CHANNEL_MEMBER,
+ }
+
+ for _, member := range membersToSanitize {
+ if _, ok := o.GetProps()[member]; ok {
+ o.DelProp(member)
+ }
+ }
+}
+
+func (o *Post) PreSave() {
+ if o.Id == "" {
+ o.Id = NewId()
+ }
+
+ o.OriginalId = ""
+
+ if o.CreateAt == 0 {
+ o.CreateAt = GetMillis()
+ }
+
+ o.UpdateAt = o.CreateAt
+ o.PreCommit()
+}
+
+func (o *Post) PreCommit() {
+ if o.GetProps() == nil {
+ o.SetProps(make(map[string]interface{}))
+ }
+
+ if o.Filenames == nil {
+ o.Filenames = []string{}
+ }
+
+ if o.FileIds == nil {
+ o.FileIds = []string{}
+ }
+
+ o.GenerateActionIds()
+
+ // There's a rare bug where the client sends up duplicate FileIds so protect against that
+ o.FileIds = RemoveDuplicateStrings(o.FileIds)
+}
+
+func (o *Post) MakeNonNil() {
+ if o.GetProps() == nil {
+ o.SetProps(make(map[string]interface{}))
+ }
+}
+
+func (o *Post) DelProp(key string) {
+ o.propsMu.Lock()
+ defer o.propsMu.Unlock()
+ propsCopy := make(map[string]interface{}, len(o.Props)-1)
+ for k, v := range o.Props {
+ propsCopy[k] = v
+ }
+ delete(propsCopy, key)
+ o.Props = propsCopy
+}
+
+func (o *Post) AddProp(key string, value interface{}) {
+ o.propsMu.Lock()
+ defer o.propsMu.Unlock()
+ propsCopy := make(map[string]interface{}, len(o.Props)+1)
+ for k, v := range o.Props {
+ propsCopy[k] = v
+ }
+ propsCopy[key] = value
+ o.Props = propsCopy
+}
+
+func (o *Post) GetProps() StringInterface {
+ o.propsMu.RLock()
+ defer o.propsMu.RUnlock()
+ return o.Props
+}
+
+func (o *Post) SetProps(props StringInterface) {
+ o.propsMu.Lock()
+ defer o.propsMu.Unlock()
+ o.Props = props
+}
+
+func (o *Post) GetProp(key string) interface{} {
+ o.propsMu.RLock()
+ defer o.propsMu.RUnlock()
+ return o.Props[key]
+}
+
+func (o *Post) IsSystemMessage() bool {
+ return len(o.Type) >= len(POST_SYSTEM_MESSAGE_PREFIX) && o.Type[:len(POST_SYSTEM_MESSAGE_PREFIX)] == POST_SYSTEM_MESSAGE_PREFIX
+}
+
+func (o *Post) IsJoinLeaveMessage() bool {
+ return o.Type == POST_JOIN_LEAVE ||
+ o.Type == POST_ADD_REMOVE ||
+ o.Type == POST_JOIN_CHANNEL ||
+ o.Type == POST_LEAVE_CHANNEL ||
+ o.Type == POST_JOIN_TEAM ||
+ o.Type == POST_LEAVE_TEAM ||
+ o.Type == POST_ADD_TO_CHANNEL ||
+ o.Type == POST_REMOVE_FROM_CHANNEL ||
+ o.Type == POST_ADD_TO_TEAM ||
+ o.Type == POST_REMOVE_FROM_TEAM
+}
+
+func (o *Post) Patch(patch *PostPatch) {
+ if patch.IsPinned != nil {
+ o.IsPinned = *patch.IsPinned
+ }
+
+ if patch.Message != nil {
+ o.Message = *patch.Message
+ }
+
+ if patch.Props != nil {
+ newProps := *patch.Props
+ o.SetProps(newProps)
+ }
+
+ if patch.FileIds != nil {
+ o.FileIds = *patch.FileIds
+ }
+
+ if patch.HasReactions != nil {
+ o.HasReactions = *patch.HasReactions
+ }
+}
+
+func (o *PostPatch) ToJson() string {
+ b, err := json.Marshal(o)
+ if err != nil {
+ return ""
+ }
+
+ return string(b)
+}
+
+func PostPatchFromJson(data io.Reader) *PostPatch {
+ decoder := json.NewDecoder(data)
+ var post PostPatch
+ err := decoder.Decode(&post)
+ if err != nil {
+ return nil
+ }
+
+ return &post
+}
+
+func (o *SearchParameter) SearchParameterToJson() string {
+ b, err := json.Marshal(o)
+ if err != nil {
+ return ""
+ }
+
+ return string(b)
+}
+
+func SearchParameterFromJson(data io.Reader) *SearchParameter {
+ decoder := json.NewDecoder(data)
+ var searchParam SearchParameter
+ err := decoder.Decode(&searchParam)
+ if err != nil {
+ return nil
+ }
+
+ return &searchParam
+}
+
+func (o *Post) ChannelMentions() []string {
+ return ChannelMentions(o.Message)
+}
+
+// DisableMentionHighlights disables a posts mention highlighting and returns the first channel mention that was present in the message.
+func (o *Post) DisableMentionHighlights() string {
+ mention, hasMentions := findAtChannelMention(o.Message)
+ if hasMentions {
+ o.AddProp(POST_PROPS_MENTION_HIGHLIGHT_DISABLED, true)
+ }
+ return mention
+}
+
+// DisableMentionHighlights disables mention highlighting for a post patch if required.
+func (o *PostPatch) DisableMentionHighlights() {
+ if _, hasMentions := findAtChannelMention(*o.Message); hasMentions {
+ if o.Props == nil {
+ o.Props = &StringInterface{}
+ }
+ (*o.Props)[POST_PROPS_MENTION_HIGHLIGHT_DISABLED] = true
+ }
+}
+
+func findAtChannelMention(message string) (mention string, found bool) {
+ re := regexp.MustCompile(`(?i)\B@(channel|all|here)\b`)
+ matched := re.FindStringSubmatch(message)
+ if found = (len(matched) > 0); found {
+ mention = strings.ToLower(matched[0])
+ }
+ return
+}
+
+func (o *Post) Attachments() []*SlackAttachment {
+ if attachments, ok := o.GetProp("attachments").([]*SlackAttachment); ok {
+ return attachments
+ }
+ var ret []*SlackAttachment
+ if attachments, ok := o.GetProp("attachments").([]interface{}); ok {
+ for _, attachment := range attachments {
+ if enc, err := json.Marshal(attachment); err == nil {
+ var decoded SlackAttachment
+ if json.Unmarshal(enc, &decoded) == nil {
+ ret = append(ret, &decoded)
+ }
+ }
+ }
+ }
+ return ret
+}
+
+func (o *Post) AttachmentsEqual(input *Post) bool {
+ attachments := o.Attachments()
+ inputAttachments := input.Attachments()
+
+ if len(attachments) != len(inputAttachments) {
+ return false
+ }
+
+ for i := range attachments {
+ if !attachments[i].Equals(inputAttachments[i]) {
+ return false
+ }
+ }
+
+ return true
+}
+
+var markdownDestinationEscaper = strings.NewReplacer(
+ `\`, `\\`,
+ `<`, `\<`,
+ `>`, `\>`,
+ `(`, `\(`,
+ `)`, `\)`,
+)
+
+// WithRewrittenImageURLs returns a new shallow copy of the post where the message has been
+// rewritten via RewriteImageURLs.
+func (o *Post) WithRewrittenImageURLs(f func(string) string) *Post {
+ copy := o.Clone()
+ copy.Message = RewriteImageURLs(o.Message, f)
+ if copy.MessageSource == "" && copy.Message != o.Message {
+ copy.MessageSource = o.Message
+ }
+ return copy
+}
+
+func (o *PostEphemeral) ToUnsanitizedJson() string {
+ b, _ := json.Marshal(o)
+ return string(b)
+}
+
+// RewriteImageURLs takes a message and returns a copy that has all of the image URLs replaced
+// according to the function f. For each image URL, f will be invoked, and the resulting markdown
+// will contain the URL returned by that invocation instead.
+//
+// Image URLs are destination URLs used in inline images or reference definitions that are used
+// anywhere in the input markdown as an image.
+func RewriteImageURLs(message string, f func(string) string) string {
+ if !strings.Contains(message, "![") {
+ return message
+ }
+
+ var ranges []markdown.Range
+
+ markdown.Inspect(message, func(blockOrInline interface{}) bool {
+ switch v := blockOrInline.(type) {
+ case *markdown.ReferenceImage:
+ ranges = append(ranges, v.ReferenceDefinition.RawDestination)
+ case *markdown.InlineImage:
+ ranges = append(ranges, v.RawDestination)
+ default:
+ return true
+ }
+ return true
+ })
+
+ if ranges == nil {
+ return message
+ }
+
+ sort.Slice(ranges, func(i, j int) bool {
+ return ranges[i].Position < ranges[j].Position
+ })
+
+ copyRanges := make([]markdown.Range, 0, len(ranges))
+ urls := make([]string, 0, len(ranges))
+ resultLength := len(message)
+
+ start := 0
+ for i, r := range ranges {
+ switch {
+ case i == 0:
+ case r.Position != ranges[i-1].Position:
+ start = ranges[i-1].End
+ default:
+ continue
+ }
+ original := message[r.Position:r.End]
+ replacement := markdownDestinationEscaper.Replace(f(markdown.Unescape(original)))
+ resultLength += len(replacement) - len(original)
+ copyRanges = append(copyRanges, markdown.Range{Position: start, End: r.Position})
+ urls = append(urls, replacement)
+ }
+
+ result := make([]byte, resultLength)
+
+ offset := 0
+ for i, r := range copyRanges {
+ offset += copy(result[offset:], message[r.Position:r.End])
+ offset += copy(result[offset:], urls[i])
+ }
+ copy(result[offset:], message[ranges[len(ranges)-1].End:])
+
+ return string(result)
+}