Update vendor

1 files changed, 587 insertions, 0 deletions

diff --git a/vendor/github.com/mattermost/mattermost-server/v6/model/utils.go b/vendor/github.com/mattermost/mattermost-server/v6/model/utils.go
new file mode 100644
index 00000000..fab3f494
--- /dev/null
+++ b/vendor/github.com/mattermost/mattermost-server/v6/model/utils.go
@@ -0,0 +1,587 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+package model
+
+import (
+	"bytes"
+	"crypto/rand"
+	"encoding/base32"
+	"encoding/json"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"net"
+	"net/http"
+	"net/mail"
+	"net/url"
+	"regexp"
+	"sort"
+	"strings"
+	"sync"
+	"time"
+	"unicode"
+
+	"github.com/mattermost/mattermost-server/v6/shared/i18n"
+	"github.com/pborman/uuid"
+)
+
+const (
+	LowercaseLetters = "abcdefghijklmnopqrstuvwxyz"
+	UppercaseLetters = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+	NUMBERS          = "0123456789"
+	SYMBOLS          = " !\"\\#$%&'()*+,-./:;<=>?@[]^_`|~"
+)
+
+type StringInterface map[string]interface{}
+type StringArray []string
+
+func (sa StringArray) Remove(input string) StringArray {
+	for index := range sa {
+		if sa[index] == input {
+			ret := make(StringArray, 0, len(sa)-1)
+			ret = append(ret, sa[:index]...)
+			return append(ret, sa[index+1:]...)
+		}
+	}
+	return sa
+}
+
+func (sa StringArray) Contains(input string) bool {
+	for index := range sa {
+		if sa[index] == input {
+			return true
+		}
+	}
+
+	return false
+}
+func (sa StringArray) Equals(input StringArray) bool {
+
+	if len(sa) != len(input) {
+		return false
+	}
+
+	for index := range sa {
+
+		if sa[index] != input[index] {
+			return false
+		}
+	}
+
+	return true
+}
+
+var translateFunc i18n.TranslateFunc
+var translateFuncOnce sync.Once
+
+func AppErrorInit(t i18n.TranslateFunc) {
+	translateFuncOnce.Do(func() {
+		translateFunc = t
+	})
+}
+
+type AppError struct {
+	Id            string `json:"id"`
+	Message       string `json:"message"`               // Message to be display to the end user without debugging information
+	DetailedError string `json:"detailed_error"`        // Internal error string to help the developer
+	RequestId     string `json:"request_id,omitempty"`  // The RequestId that's also set in the header
+	StatusCode    int    `json:"status_code,omitempty"` // The http status code
+	Where         string `json:"-"`                     // The function where it happened in the form of Struct.Func
+	IsOAuth       bool   `json:"is_oauth,omitempty"`    // Whether the error is OAuth specific
+	params        map[string]interface{}
+}
+
+func (er *AppError) Error() string {
+	return er.Where + ": " + er.Message + ", " + er.DetailedError
+}
+
+func (er *AppError) Translate(T i18n.TranslateFunc) {
+	if T == nil {
+		er.Message = er.Id
+		return
+	}
+
+	if er.params == nil {
+		er.Message = T(er.Id)
+	} else {
+		er.Message = T(er.Id, er.params)
+	}
+}
+
+func (er *AppError) SystemMessage(T i18n.TranslateFunc) string {
+	if er.params == nil {
+		return T(er.Id)
+	}
+	return T(er.Id, er.params)
+}
+
+func (er *AppError) ToJSON() string {
+	b, _ := json.Marshal(er)
+	return string(b)
+}
+
+// AppErrorFromJSON will decode the input and return an AppError
+func AppErrorFromJSON(data io.Reader) *AppError {
+	str := ""
+	bytes, rerr := ioutil.ReadAll(data)
+	if rerr != nil {
+		str = rerr.Error()
+	} else {
+		str = string(bytes)
+	}
+
+	decoder := json.NewDecoder(strings.NewReader(str))
+	var er AppError
+	err := decoder.Decode(&er)
+	if err != nil {
+		return NewAppError("AppErrorFromJSON", "model.utils.decode_json.app_error", nil, "body: "+str, http.StatusInternalServerError)
+	}
+	return &er
+}
+
+func NewAppError(where string, id string, params map[string]interface{}, details string, status int) *AppError {
+	ap := &AppError{}
+	ap.Id = id
+	ap.params = params
+	ap.Message = id
+	ap.Where = where
+	ap.DetailedError = details
+	ap.StatusCode = status
+	ap.IsOAuth = false
+	ap.Translate(translateFunc)
+	return ap
+}
+
+var encoding = base32.NewEncoding("ybndrfg8ejkmcpqxot1uwisza345h769")
+
+// NewId is a globally unique identifier.  It is a [A-Z0-9] string 26
+// characters long.  It is a UUID version 4 Guid that is zbased32 encoded
+// with the padding stripped off.
+func NewId() string {
+	var b bytes.Buffer
+	encoder := base32.NewEncoder(encoding, &b)
+	encoder.Write(uuid.NewRandom())
+	encoder.Close()
+	b.Truncate(26) // removes the '==' padding
+	return b.String()
+}
+
+// NewRandomTeamName is a NewId that will be a valid team name.
+func NewRandomTeamName() string {
+	teamName := NewId()
+	for IsReservedTeamName(teamName) {
+		teamName = NewId()
+	}
+	return teamName
+}
+
+// NewRandomString returns a random string of the given length.
+// The resulting entropy will be (5 * length) bits.
+func NewRandomString(length int) string {
+	data := make([]byte, 1+(length*5/8))
+	rand.Read(data)
+	return encoding.EncodeToString(data)[:length]
+}
+
+// GetMillis is a convenience method to get milliseconds since epoch.
+func GetMillis() int64 {
+	return time.Now().UnixNano() / int64(time.Millisecond)
+}
+
+// GetMillisForTime is a convenience method to get milliseconds since epoch for provided Time.
+func GetMillisForTime(thisTime time.Time) int64 {
+	return thisTime.UnixNano() / int64(time.Millisecond)
+}
+
+// GetTimeForMillis is a convenience method to get time.Time for milliseconds since epoch.
+func GetTimeForMillis(millis int64) time.Time {
+	return time.Unix(0, millis*int64(time.Millisecond))
+}
+
+// PadDateStringZeros is a convenience method to pad 2 digit date parts with zeros to meet ISO 8601 format
+func PadDateStringZeros(dateString string) string {
+	parts := strings.Split(dateString, "-")
+	for index, part := range parts {
+		if len(part) == 1 {
+			parts[index] = "0" + part
+		}
+	}
+	dateString = strings.Join(parts[:], "-")
+	return dateString
+}
+
+// GetStartOfDayMillis is a convenience method to get milliseconds since epoch for provided date's start of day
+func GetStartOfDayMillis(thisTime time.Time, timeZoneOffset int) int64 {
+	localSearchTimeZone := time.FixedZone("Local Search Time Zone", timeZoneOffset)
+	resultTime := time.Date(thisTime.Year(), thisTime.Month(), thisTime.Day(), 0, 0, 0, 0, localSearchTimeZone)
+	return GetMillisForTime(resultTime)
+}
+
+// GetEndOfDayMillis is a convenience method to get milliseconds since epoch for provided date's end of day
+func GetEndOfDayMillis(thisTime time.Time, timeZoneOffset int) int64 {
+	localSearchTimeZone := time.FixedZone("Local Search Time Zone", timeZoneOffset)
+	resultTime := time.Date(thisTime.Year(), thisTime.Month(), thisTime.Day(), 23, 59, 59, 999999999, localSearchTimeZone)
+	return GetMillisForTime(resultTime)
+}
+
+func CopyStringMap(originalMap map[string]string) map[string]string {
+	copyMap := make(map[string]string, len(originalMap))
+	for k, v := range originalMap {
+		copyMap[k] = v
+	}
+	return copyMap
+}
+
+// MapToJSON converts a map to a json string
+func MapToJSON(objmap map[string]string) string {
+	b, _ := json.Marshal(objmap)
+	return string(b)
+}
+
+// MapBoolToJSON converts a map to a json string
+func MapBoolToJSON(objmap map[string]bool) string {
+	b, _ := json.Marshal(objmap)
+	return string(b)
+}
+
+// MapFromJSON will decode the key/value pair map
+func MapFromJSON(data io.Reader) map[string]string {
+	decoder := json.NewDecoder(data)
+
+	var objmap map[string]string
+	if err := decoder.Decode(&objmap); err != nil {
+		return make(map[string]string)
+	}
+	return objmap
+}
+
+// MapFromJSON will decode the key/value pair map
+func MapBoolFromJSON(data io.Reader) map[string]bool {
+	decoder := json.NewDecoder(data)
+
+	var objmap map[string]bool
+	if err := decoder.Decode(&objmap); err != nil {
+		return make(map[string]bool)
+	}
+	return objmap
+}
+
+func ArrayToJSON(objmap []string) string {
+	b, _ := json.Marshal(objmap)
+	return string(b)
+}
+
+func ArrayFromJSON(data io.Reader) []string {
+	decoder := json.NewDecoder(data)
+
+	var objmap []string
+	if err := decoder.Decode(&objmap); err != nil {
+		return make([]string, 0)
+	}
+	return objmap
+}
+
+func ArrayFromInterface(data interface{}) []string {
+	stringArray := []string{}
+
+	dataArray, ok := data.([]interface{})
+	if !ok {
+		return stringArray
+	}
+
+	for _, v := range dataArray {
+		if str, ok := v.(string); ok {
+			stringArray = append(stringArray, str)
+		}
+	}
+
+	return stringArray
+}
+
+func StringInterfaceToJSON(objmap map[string]interface{}) string {
+	b, _ := json.Marshal(objmap)
+	return string(b)
+}
+
+func StringInterfaceFromJSON(data io.Reader) map[string]interface{} {
+	decoder := json.NewDecoder(data)
+
+	var objmap map[string]interface{}
+	if err := decoder.Decode(&objmap); err != nil {
+		return make(map[string]interface{})
+	}
+	return objmap
+}
+
+// ToJSON serializes an arbitrary data type to JSON, discarding the error.
+func ToJSON(v interface{}) []byte {
+	b, _ := json.Marshal(v)
+	return b
+}
+
+func GetServerIPAddress(iface string) string {
+	var addrs []net.Addr
+	if iface == "" {
+		var err error
+		addrs, err = net.InterfaceAddrs()
+		if err != nil {
+			return ""
+		}
+	} else {
+		interfaces, err := net.Interfaces()
+		if err != nil {
+			return ""
+		}
+		for _, i := range interfaces {
+			if i.Name == iface {
+				addrs, err = i.Addrs()
+				if err != nil {
+					return ""
+				}
+				break
+			}
+		}
+	}
+
+	for _, addr := range addrs {
+
+		if ip, ok := addr.(*net.IPNet); ok && !ip.IP.IsLoopback() && !ip.IP.IsLinkLocalUnicast() && !ip.IP.IsLinkLocalMulticast() {
+			if ip.IP.To4() != nil {
+				return ip.IP.String()
+			}
+		}
+	}
+
+	return ""
+}
+
+func isLower(s string) bool {
+	return strings.ToLower(s) == s
+}
+
+func IsValidEmail(email string) bool {
+	if !isLower(email) {
+		return false
+	}
+
+	if addr, err := mail.ParseAddress(email); err != nil {
+		return false
+	} else if addr.Name != "" {
+		// mail.ParseAddress accepts input of the form "Billy Bob <billy@example.com>" which we don't allow
+		return false
+	}
+
+	return true
+}
+
+var reservedName = []string{
+	"admin",
+	"api",
+	"channel",
+	"claim",
+	"error",
+	"files",
+	"help",
+	"landing",
+	"login",
+	"mfa",
+	"oauth",
+	"plug",
+	"plugins",
+	"post",
+	"signup",
+	"boards",
+	"playbooks",
+}
+
+func IsValidChannelIdentifier(s string) bool {
+
+	if !IsValidAlphaNumHyphenUnderscore(s, true) {
+		return false
+	}
+
+	if len(s) < ChannelNameMinLength {
+		return false
+	}
+
+	return true
+}
+
+var (
+	validAlphaNum                           = regexp.MustCompile(`^[a-z0-9]+([a-z\-0-9]+|(__)?)[a-z0-9]+$`)
+	validAlphaNumHyphenUnderscore           = regexp.MustCompile(`^[a-z0-9]+([a-z\-\_0-9]+|(__)?)[a-z0-9]+$`)
+	validSimpleAlphaNumHyphenUnderscore     = regexp.MustCompile(`^[a-zA-Z0-9\-_]+$`)
+	validSimpleAlphaNumHyphenUnderscorePlus = regexp.MustCompile(`^[a-zA-Z0-9+_-]+$`)
+)
+
+func isValidAlphaNum(s string) bool {
+	return validAlphaNum.MatchString(s)
+}
+
+func IsValidAlphaNumHyphenUnderscore(s string, withFormat bool) bool {
+	if withFormat {
+		return validAlphaNumHyphenUnderscore.MatchString(s)
+	}
+	return validSimpleAlphaNumHyphenUnderscore.MatchString(s)
+}
+
+func IsValidAlphaNumHyphenUnderscorePlus(s string) bool {
+	return validSimpleAlphaNumHyphenUnderscorePlus.MatchString(s)
+}
+
+func Etag(parts ...interface{}) string {
+
+	etag := CurrentVersion
+
+	for _, part := range parts {
+		etag += fmt.Sprintf(".%v", part)
+	}
+
+	return etag
+}
+
+var (
+	validHashtag = regexp.MustCompile(`^(#\pL[\pL\d\-_.]*[\pL\d])$`)
+	puncStart    = regexp.MustCompile(`^[^\pL\d\s#]+`)
+	hashtagStart = regexp.MustCompile(`^#{2,}`)
+	puncEnd      = regexp.MustCompile(`[^\pL\d\s]+$`)
+)
+
+func ParseHashtags(text string) (string, string) {
+	words := strings.Fields(text)
+
+	hashtagString := ""
+	plainString := ""
+	for _, word := range words {
+		// trim off surrounding punctuation
+		word = puncStart.ReplaceAllString(word, "")
+		word = puncEnd.ReplaceAllString(word, "")
+
+		// and remove extra pound #s
+		word = hashtagStart.ReplaceAllString(word, "#")
+
+		if validHashtag.MatchString(word) {
+			hashtagString += " " + word
+		} else {
+			plainString += " " + word
+		}
+	}
+
+	if len(hashtagString) > 1000 {
+		hashtagString = hashtagString[:999]
+		lastSpace := strings.LastIndex(hashtagString, " ")
+		if lastSpace > -1 {
+			hashtagString = hashtagString[:lastSpace]
+		} else {
+			hashtagString = ""
+		}
+	}
+
+	return strings.TrimSpace(hashtagString), strings.TrimSpace(plainString)
+}
+
+func ClearMentionTags(post string) string {
+	post = strings.Replace(post, "<mention>", "", -1)
+	post = strings.Replace(post, "</mention>", "", -1)
+	return post
+}
+
+func IsValidHTTPURL(rawURL string) bool {
+	if strings.Index(rawURL, "http://") != 0 && strings.Index(rawURL, "https://") != 0 {
+		return false
+	}
+
+	if u, err := url.ParseRequestURI(rawURL); err != nil || u.Scheme == "" || u.Host == "" {
+		return false
+	}
+
+	return true
+}
+
+func IsValidId(value string) bool {
+	if len(value) != 26 {
+		return false
+	}
+
+	for _, r := range value {
+		if !unicode.IsLetter(r) && !unicode.IsNumber(r) {
+			return false
+		}
+	}
+
+	return true
+}
+
+// RemoveDuplicateStrings does an in-place removal of duplicate strings
+// from the input slice. The original slice gets modified.
+func RemoveDuplicateStrings(in []string) []string {
+	// In-place de-dup.
+	// Copied from https://github.com/golang/go/wiki/SliceTricks#in-place-deduplicate-comparable
+	if len(in) == 0 {
+		return in
+	}
+	sort.Strings(in)
+	j := 0
+	for i := 1; i < len(in); i++ {
+		if in[j] == in[i] {
+			continue
+		}
+		j++
+		in[j] = in[i]
+	}
+	return in[:j+1]
+}
+
+func GetPreferredTimezone(timezone StringMap) string {
+	if timezone["useAutomaticTimezone"] == "true" {
+		return timezone["automaticTimezone"]
+	}
+
+	return timezone["manualTimezone"]
+}
+
+// SanitizeUnicode will remove undesirable Unicode characters from a string.
+func SanitizeUnicode(s string) string {
+	return strings.Map(filterBlocklist, s)
+}
+
+// filterBlocklist returns `r` if it is not in the blocklist, otherwise drop (-1).
+// Blocklist is taken from https://www.w3.org/TR/unicode-xml/#Charlist
+func filterBlocklist(r rune) rune {
+	const drop = -1
+	switch r {
+	case '\u0340', '\u0341': // clones of grave and acute; deprecated in Unicode
+		return drop
+	case '\u17A3', '\u17D3': // obsolete characters for Khmer; deprecated in Unicode
+		return drop
+	case '\u2028', '\u2029': // line and paragraph separator
+		return drop
+	case '\u202A', '\u202B', '\u202C', '\u202D', '\u202E': // BIDI embedding controls
+		return drop
+	case '\u206A', '\u206B': // activate/inhibit symmetric swapping; deprecated in Unicode
+		return drop
+	case '\u206C', '\u206D': // activate/inhibit Arabic form shaping; deprecated in Unicode
+		return drop
+	case '\u206E', '\u206F': // activate/inhibit national digit shapes; deprecated in Unicode
+		return drop
+	case '\uFFF9', '\uFFFA', '\uFFFB': // interlinear annotation characters
+		return drop
+	case '\uFEFF': // byte order mark
+		return drop
+	case '\uFFFC': // object replacement character
+		return drop
+	}
+
+	// Scoping for musical notation
+	if r >= 0x0001D173 && r <= 0x0001D17A {
+		return drop
+	}
+
+	// Language tag code points
+	if r >= 0x000E0000 && r <= 0x000E007F {
+		return drop
+	}
+
+	return r
+}