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// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
// See License.txt for license information.
package model
import (
"regexp"
"strings"
)
var searchTermPuncStart = regexp.MustCompile(`^[^\pL\d\s#"]+`)
var searchTermPuncEnd = regexp.MustCompile(`[^\pL\d\s*"]+$`)
type SearchParams struct {
Terms string
IsHashtag bool
InChannels []string
FromUsers []string
OrTerms bool
}
var searchFlags = [...]string{"from", "channel", "in"}
func splitWordsNoQuotes(text string) []string {
words := []string{}
for _, word := range strings.Fields(text) {
words = append(words, word)
}
return words
}
func splitWords(text string) []string {
words := []string{}
foundQuote := false
location := 0
for i, char := range text {
if char == '"' {
if foundQuote {
// Grab the quoted section
word := text[location : i+1]
words = append(words, word)
foundQuote = false
location = i + 1
} else {
words = append(words, splitWordsNoQuotes(text[location:i])...)
foundQuote = true
location = i
}
}
}
words = append(words, splitWordsNoQuotes(text[location:])...)
return words
}
func parseSearchFlags(input []string) ([]string, [][2]string) {
words := []string{}
flags := [][2]string{}
skipNextWord := false
for i, word := range input {
if skipNextWord {
skipNextWord = false
continue
}
isFlag := false
if colon := strings.Index(word, ":"); colon != -1 {
flag := word[:colon]
value := word[colon+1:]
for _, searchFlag := range searchFlags {
// check for case insensitive equality
if strings.EqualFold(flag, searchFlag) {
if value != "" {
flags = append(flags, [2]string{searchFlag, value})
isFlag = true
} else if i < len(input)-1 {
flags = append(flags, [2]string{searchFlag, input[i+1]})
skipNextWord = true
isFlag = true
}
if isFlag {
break
}
}
}
}
if !isFlag {
// trim off surrounding punctuation (note that we leave trailing asterisks to allow wildcards)
word = searchTermPuncStart.ReplaceAllString(word, "")
word = searchTermPuncEnd.ReplaceAllString(word, "")
// and remove extra pound #s
word = hashtagStart.ReplaceAllString(word, "#")
if len(word) != 0 {
words = append(words, word)
}
}
}
return words, flags
}
func ParseSearchParams(text string) []*SearchParams {
words, flags := parseSearchFlags(splitWords(text))
hashtagTermList := []string{}
plainTermList := []string{}
for _, word := range words {
if validHashtag.MatchString(word) {
hashtagTermList = append(hashtagTermList, word)
} else {
plainTermList = append(plainTermList, word)
}
}
hashtagTerms := strings.Join(hashtagTermList, " ")
plainTerms := strings.Join(plainTermList, " ")
inChannels := []string{}
fromUsers := []string{}
for _, flagPair := range flags {
flag := flagPair[0]
value := flagPair[1]
if flag == "in" || flag == "channel" {
inChannels = append(inChannels, value)
} else if flag == "from" {
fromUsers = append(fromUsers, value)
}
}
paramsList := []*SearchParams{}
if len(plainTerms) > 0 {
paramsList = append(paramsList, &SearchParams{
Terms: plainTerms,
IsHashtag: false,
InChannels: inChannels,
FromUsers: fromUsers,
})
}
if len(hashtagTerms) > 0 {
paramsList = append(paramsList, &SearchParams{
Terms: hashtagTerms,
IsHashtag: true,
InChannels: inChannels,
FromUsers: fromUsers,
})
}
// special case for when no terms are specified but we still have a filter
if len(plainTerms) == 0 && len(hashtagTerms) == 0 && (len(inChannels) != 0 || len(fromUsers) != 0) {
paramsList = append(paramsList, &SearchParams{
Terms: "",
IsHashtag: false,
InChannels: inChannels,
FromUsers: fromUsers,
})
}
return paramsList
}
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