/
command_autocomplete.go
326 lines (284 loc) · 14 KB
/
command_autocomplete.go
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// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
// See LICENSE.txt for license information.
package app
import (
"errors"
"fmt"
"net/url"
"sort"
"strings"
"github.com/mattermost/mattermost-server/v5/app/request"
"github.com/mattermost/mattermost-server/v5/model"
"github.com/mattermost/mattermost-server/v5/shared/mlog"
)
// AutocompleteDynamicArgProvider dynamically provides auto-completion args for built-in commands.
type AutocompleteDynamicArgProvider interface {
GetAutoCompleteListItems(a *App, commandArgs *model.CommandArgs, arg *model.AutocompleteArg, parsed, toBeParsed string) ([]model.AutocompleteListItem, error)
}
// GetSuggestions returns suggestions for user input.
func (a *App) GetSuggestions(c *request.Context, commandArgs *model.CommandArgs, commands []*model.Command, roleID string) []model.AutocompleteSuggestion {
sort.Slice(commands, func(i, j int) bool {
return strings.Compare(strings.ToLower(commands[i].Trigger), strings.ToLower(commands[j].Trigger)) < 0
})
autocompleteData := []*model.AutocompleteData{}
for _, command := range commands {
if command.AutocompleteData == nil {
command.AutocompleteData = model.NewAutocompleteData(command.Trigger, command.AutoCompleteHint, command.AutoCompleteDesc)
}
autocompleteData = append(autocompleteData, command.AutocompleteData)
}
userInput := commandArgs.Command
suggestions := a.getSuggestions(c, commandArgs, autocompleteData, "", userInput, roleID)
for i, suggestion := range suggestions {
for _, command := range commands {
if strings.HasPrefix(suggestion.Complete, command.Trigger) {
suggestions[i].IconData = command.AutocompleteIconData
break
}
}
}
return suggestions
}
func (a *App) getSuggestions(c *request.Context, commandArgs *model.CommandArgs, commands []*model.AutocompleteData, inputParsed, inputToBeParsed, roleID string) []model.AutocompleteSuggestion {
suggestions := []model.AutocompleteSuggestion{}
index := strings.Index(inputToBeParsed, " ")
if index == -1 { // no space in input
for _, command := range commands {
if strings.HasPrefix(command.Trigger, strings.ToLower(inputToBeParsed)) && (command.RoleID == roleID || roleID == model.SYSTEM_ADMIN_ROLE_ID || roleID == "") {
s := model.AutocompleteSuggestion{
Complete: inputParsed + command.Trigger,
Suggestion: command.Trigger,
Description: command.HelpText,
Hint: command.Hint,
}
suggestions = append(suggestions, s)
}
}
return suggestions
}
for _, command := range commands {
if command.Trigger != strings.ToLower(inputToBeParsed[:index]) {
continue
}
if roleID != "" && roleID != model.SYSTEM_ADMIN_ROLE_ID && roleID != command.RoleID {
continue
}
toBeParsed := inputToBeParsed[index+1:]
parsed := inputParsed + inputToBeParsed[:index+1]
if len(command.Arguments) == 0 {
// Seek recursively in subcommands
subSuggestions := a.getSuggestions(c, commandArgs, command.SubCommands, parsed, toBeParsed, roleID)
suggestions = append(suggestions, subSuggestions...)
continue
}
found, _, _, suggestion := a.parseArguments(c, commandArgs, command.Arguments, parsed, toBeParsed)
if found {
suggestions = append(suggestions, suggestion...)
}
}
return suggestions
}
func (a *App) parseArguments(c *request.Context, commandArgs *model.CommandArgs, args []*model.AutocompleteArg, parsed, toBeParsed string) (found bool, alreadyParsed string, yetToBeParsed string, suggestions []model.AutocompleteSuggestion) {
if len(args) == 0 {
return false, parsed, toBeParsed, suggestions
}
if args[0].Required {
found, changedParsed, changedToBeParsed, suggestion := a.parseArgument(c, commandArgs, args[0], parsed, toBeParsed)
if found {
suggestions = append(suggestions, suggestion...)
return true, changedParsed, changedToBeParsed, suggestions
}
return a.parseArguments(c, commandArgs, args[1:], changedParsed, changedToBeParsed)
}
// Handling optional arguments. Optional argument can be inputted or not,
// so we have to pase both cases recursively and output combined suggestions.
foundWithOptional, changedParsedWithOptional, changedToBeParsedWithOptional, suggestionsWithOptional := a.parseArgument(c, commandArgs, args[0], parsed, toBeParsed)
if foundWithOptional {
suggestions = append(suggestions, suggestionsWithOptional...)
} else {
foundWithOptionalRest, changedParsedWithOptionalRest, changedToBeParsedWithOptionalRest, suggestionsWithOptionalRest := a.parseArguments(c, commandArgs, args[1:], changedParsedWithOptional, changedToBeParsedWithOptional)
if foundWithOptionalRest {
suggestions = append(suggestions, suggestionsWithOptionalRest...)
}
foundWithOptional = foundWithOptionalRest
changedParsedWithOptional = changedParsedWithOptionalRest
changedToBeParsedWithOptional = changedToBeParsedWithOptionalRest
}
foundWithoutOptional, changedParsedWithoutOptional, changedToBeParsedWithoutOptional, suggestionsWithoutOptional := a.parseArguments(c, commandArgs, args[1:], parsed, toBeParsed)
if foundWithoutOptional {
suggestions = append(suggestions, suggestionsWithoutOptional...)
}
// if suggestions were found we can return them
if foundWithOptional || foundWithoutOptional {
return true, parsed + toBeParsed, "", suggestions
}
// no suggestions found yet, check if optional argument was inputted
if changedParsedWithOptional != parsed && changedToBeParsedWithOptional != toBeParsed {
return false, changedParsedWithOptional, changedToBeParsedWithOptional, suggestions
}
// no suggestions and optional argument was not inputted
return foundWithoutOptional, changedParsedWithoutOptional, changedToBeParsedWithoutOptional, suggestions
}
func (a *App) parseArgument(c *request.Context, commandArgs *model.CommandArgs, arg *model.AutocompleteArg, parsed, toBeParsed string) (found bool, alreadyParsed string, yetToBeParsed string, suggestions []model.AutocompleteSuggestion) {
if arg.Name != "" { //Parse the --name first
found, changedParsed, changedToBeParsed, suggestion := parseNamedArgument(arg, parsed, toBeParsed)
if found {
suggestions = append(suggestions, suggestion)
return true, changedParsed, changedToBeParsed, suggestions
}
if changedToBeParsed == "" {
return true, changedParsed, changedToBeParsed, suggestions
}
if changedToBeParsed == " " {
changedToBeParsed = ""
}
parsed = changedParsed
toBeParsed = changedToBeParsed
}
if arg.Type == model.AutocompleteArgTypeText {
found, changedParsed, changedToBeParsed, suggestion := parseInputTextArgument(arg, parsed, toBeParsed)
if found {
suggestions = append(suggestions, suggestion)
return true, changedParsed, changedToBeParsed, suggestions
}
parsed = changedParsed
toBeParsed = changedToBeParsed
} else if arg.Type == model.AutocompleteArgTypeStaticList {
found, changedParsed, changedToBeParsed, staticListSuggestions := parseStaticListArgument(arg, parsed, toBeParsed)
if found {
suggestions = append(suggestions, staticListSuggestions...)
return true, changedParsed, changedToBeParsed, suggestions
}
parsed = changedParsed
toBeParsed = changedToBeParsed
} else if arg.Type == model.AutocompleteArgTypeDynamicList {
found, changedParsed, changedToBeParsed, dynamicListSuggestions := a.getDynamicListArgument(c, commandArgs, arg, parsed, toBeParsed)
if found {
suggestions = append(suggestions, dynamicListSuggestions...)
return true, changedParsed, changedToBeParsed, suggestions
}
parsed = changedParsed
toBeParsed = changedToBeParsed
}
return false, parsed, toBeParsed, suggestions
}
func parseNamedArgument(arg *model.AutocompleteArg, parsed, toBeParsed string) (found bool, alreadyParsed string, yetToBeParsed string, suggestion model.AutocompleteSuggestion) {
in := strings.TrimPrefix(toBeParsed, " ")
namedArg := "--" + arg.Name
if in == "" { //The user has not started typing the argument.
return true, parsed + toBeParsed, "", model.AutocompleteSuggestion{Complete: parsed + toBeParsed + namedArg + " ", Suggestion: namedArg, Hint: "", Description: arg.HelpText}
}
if strings.HasPrefix(strings.ToLower(namedArg), strings.ToLower(in)) {
return true, parsed + toBeParsed, "", model.AutocompleteSuggestion{Complete: parsed + toBeParsed + namedArg[len(in):] + " ", Suggestion: namedArg, Hint: "", Description: arg.HelpText}
}
if !strings.HasPrefix(strings.ToLower(in), strings.ToLower(namedArg)+" ") {
return false, parsed + toBeParsed, "", model.AutocompleteSuggestion{}
}
if strings.ToLower(in) == strings.ToLower(namedArg)+" " {
return false, parsed + namedArg + " ", " ", model.AutocompleteSuggestion{}
}
return false, parsed + namedArg + " ", in[len(namedArg)+1:], model.AutocompleteSuggestion{}
}
func parseInputTextArgument(arg *model.AutocompleteArg, parsed, toBeParsed string) (found bool, alreadyParsed string, yetToBeParsed string, suggestion model.AutocompleteSuggestion) {
in := strings.TrimPrefix(toBeParsed, " ")
a := arg.Data.(*model.AutocompleteTextArg)
if in == "" { //The user has not started typing the argument.
return true, parsed + toBeParsed, "", model.AutocompleteSuggestion{Complete: parsed + toBeParsed, Suggestion: "", Hint: a.Hint, Description: arg.HelpText}
}
if in[0] == '"' { //input with multiple words
indexOfSecondQuote := strings.Index(in[1:], `"`)
if indexOfSecondQuote == -1 { //typing of the multiple word argument is not finished
return true, parsed + toBeParsed, "", model.AutocompleteSuggestion{Complete: parsed + toBeParsed, Suggestion: "", Hint: a.Hint, Description: arg.HelpText}
}
// this argument is typed already
offset := 2
if len(in) > indexOfSecondQuote+2 && in[indexOfSecondQuote+2] == ' ' {
offset++
}
return false, parsed + in[:indexOfSecondQuote+offset], in[indexOfSecondQuote+offset:], model.AutocompleteSuggestion{}
}
// input with a single word
index := strings.Index(in, " ")
if index == -1 { // typing of the single word argument is not finished
return true, parsed + toBeParsed, "", model.AutocompleteSuggestion{Complete: parsed + toBeParsed, Suggestion: "", Hint: a.Hint, Description: arg.HelpText}
}
// single word argument already typed
return false, parsed + in[:index+1], in[index+1:], model.AutocompleteSuggestion{}
}
func parseStaticListArgument(arg *model.AutocompleteArg, parsed, toBeParsed string) (found bool, alreadyParsed string, yetToBeParsed string, suggestions []model.AutocompleteSuggestion) {
a := arg.Data.(*model.AutocompleteStaticListArg)
return parseListItems(a.PossibleArguments, parsed, toBeParsed)
}
func (a *App) getDynamicListArgument(c *request.Context, commandArgs *model.CommandArgs, arg *model.AutocompleteArg, parsed, toBeParsed string) (found bool, alreadyParsed string, yetToBeParsed string, suggestions []model.AutocompleteSuggestion) {
dynamicArg := arg.Data.(*model.AutocompleteDynamicListArg)
if strings.HasPrefix(dynamicArg.FetchURL, "builtin:") {
listItems, err := a.getBuiltinDynamicListArgument(commandArgs, arg, parsed, toBeParsed)
if err != nil {
a.Log().Error("Can't fetch dynamic list arguments for", mlog.String("url", dynamicArg.FetchURL), mlog.Err(err))
return false, parsed, toBeParsed, []model.AutocompleteSuggestion{}
}
return parseListItems(listItems, parsed, toBeParsed)
}
params := url.Values{}
params.Add("user_input", parsed+toBeParsed)
params.Add("parsed", parsed)
// Encode the information normally provided to a plugin slash command handler into the request parameters
// Encode PluginContext:
pluginContext := pluginContext(c)
params.Add("request_id", pluginContext.RequestId)
params.Add("session_id", pluginContext.SessionId)
params.Add("ip_address", pluginContext.IpAddress)
params.Add("accept_language", pluginContext.AcceptLanguage)
params.Add("user_agent", pluginContext.UserAgent)
// Encode CommandArgs:
params.Add("channel_id", commandArgs.ChannelId)
params.Add("team_id", commandArgs.TeamId)
params.Add("root_id", commandArgs.RootId)
params.Add("parent_id", commandArgs.ParentId)
params.Add("user_id", commandArgs.UserId)
params.Add("site_url", commandArgs.SiteURL)
resp, err := a.doPluginRequest(c, "GET", dynamicArg.FetchURL, params, nil)
if err != nil {
a.Log().Error("Can't fetch dynamic list arguments for", mlog.String("url", dynamicArg.FetchURL), mlog.Err(err))
return false, parsed, toBeParsed, []model.AutocompleteSuggestion{}
}
listItems := model.AutocompleteStaticListItemsFromJSON(resp.Body)
return parseListItems(listItems, parsed, toBeParsed)
}
func parseListItems(items []model.AutocompleteListItem, parsed, toBeParsed string) (bool, string, string, []model.AutocompleteSuggestion) {
in := strings.TrimPrefix(toBeParsed, " ")
suggestions := []model.AutocompleteSuggestion{}
maxPrefix := ""
for _, arg := range items {
if strings.HasPrefix(strings.ToLower(in), strings.ToLower(arg.Item)+" ") && len(maxPrefix) < len(arg.Item)+1 {
maxPrefix = arg.Item + " "
}
}
if maxPrefix != "" { //typing of an argument finished
return false, parsed + in[:len(maxPrefix)], in[len(maxPrefix):], []model.AutocompleteSuggestion{}
}
// user has not finished typing static argument
for _, arg := range items {
if strings.HasPrefix(strings.ToLower(arg.Item), strings.ToLower(in)) {
suggestions = append(suggestions, model.AutocompleteSuggestion{Complete: parsed + arg.Item, Suggestion: arg.Item, Hint: arg.Hint, Description: arg.HelpText})
}
}
return true, parsed + toBeParsed, "", suggestions
}
func (a *App) getBuiltinDynamicListArgument(commandArgs *model.CommandArgs, arg *model.AutocompleteArg, parsed, toBeParsed string) ([]model.AutocompleteListItem, error) {
dynamicArg := arg.Data.(*model.AutocompleteDynamicListArg)
arr := strings.Split(dynamicArg.FetchURL, ":")
if len(arr) < 2 {
return nil, errors.New("dynamic list URL missing built-in command name")
}
cmdName := arr[1]
provider := GetCommandProvider(cmdName)
if provider == nil {
return nil, fmt.Errorf("no command provider for %s", cmdName)
}
dp, ok := provider.(AutocompleteDynamicArgProvider)
if !ok {
return nil, fmt.Errorf("auto-completion not available for built-in command %s", cmdName)
}
return dp.GetAutoCompleteListItems(a, commandArgs, arg, parsed, toBeParsed)
}