Mono repo -> Master (#22553)

Combines the following repositories into one:

https://github.com/mattermost/mattermost-server
https://github.com/mattermost/mattermost-webapp
https://github.com/mattermost/focalboard
https://github.com/mattermost/mattermost-plugin-playbooks

server/channels/app/slashcommands/auto_posts.go

@@ -0,0 +1,125 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+package slashcommands
+
+import (
+	"bytes"
+	"io"
+	"os"
+	"path/filepath"
+
+	"github.com/mattermost/mattermost-server/v6/model"
+	"github.com/mattermost/mattermost-server/v6/server/channels/app"
+	"github.com/mattermost/mattermost-server/v6/server/channels/app/request"
+	"github.com/mattermost/mattermost-server/v6/server/channels/utils"
+	"github.com/mattermost/mattermost-server/v6/server/channels/utils/fileutils"
+)
+
+type AutoPostCreator struct {
+	a               *app.App
+	channelid       string
+	userid          string
+	Fuzzy           bool
+	TextLength      utils.Range
+	HasImage        bool
+	ImageFilenames  []string
+	Users           []string
+	UsersToPostFrom []string
+	Mentions        utils.Range
+	Tags            utils.Range
+	CreateTime      int64
+	postsCreated    int
+}
+
+// Automatic poster used for testing
+func NewAutoPostCreator(a *app.App, channelid, userid string) *AutoPostCreator {
+	return &AutoPostCreator{
+		a:               a,
+		channelid:       channelid,
+		userid:          userid,
+		Fuzzy:           false,
+		TextLength:      utils.Range{Begin: 100, End: 200},
+		HasImage:        false,
+		ImageFilenames:  TestImageFileNames,
+		Users:           []string{},
+		UsersToPostFrom: []string{},
+		Mentions:        utils.Range{Begin: 0, End: 5},
+		Tags:            utils.Range{Begin: 0, End: 7},
+		CreateTime:      0,
+		postsCreated:    0,
+	}
+}
+
+func (cfg *AutoPostCreator) UploadTestFile(c request.CTX) ([]string, error) {
+	filename := cfg.ImageFilenames[utils.RandIntFromRange(utils.Range{Begin: 0, End: len(cfg.ImageFilenames) - 1})]
+
+	path, _ := fileutils.FindDir("tests")
+	file, err := os.Open(filepath.Join(path, filename))
+	if err != nil {
+		return nil, err
+	}
+	defer file.Close()
+
+	data := &bytes.Buffer{}
+	_, err = io.Copy(data, file)
+	if err != nil {
+		return nil, err
+	}
+
+	fileResp, err2 := cfg.a.UploadFile(c, data.Bytes(), cfg.channelid, filename)
+	if err2 != nil {
+		return nil, err2
+	}
+
+	return []string{fileResp.Id}, nil
+}
+
+func (cfg *AutoPostCreator) CreateRandomPost(c request.CTX) (*model.Post, error) {
+	return cfg.CreateRandomPostNested(c, "")
+}
+
+func (cfg *AutoPostCreator) CreateRandomPostNested(c request.CTX, rootId string) (*model.Post, error) {
+	var fileIDs []string
+	if cfg.HasImage {
+		var err error
+		fileIDs, err = cfg.UploadTestFile(c)
+		if err != nil {
+			return nil, err
+		}
+	}
+
+	var postText string
+	if cfg.Fuzzy {
+		postText = utils.FuzzPost()
+	} else {
+		postText = utils.RandomText(cfg.TextLength, cfg.Tags, cfg.Mentions, cfg.Users)
+	}
+
+	post := &model.Post{
+		ChannelId: cfg.channelid,
+		UserId:    cfg.userid,
+		RootId:    rootId,
+		Message:   postText,
+		FileIds:   fileIDs,
+	}
+	if cfg.CreateTime != 0 {
+		// Creating posts with the exact same timestamp results in some posts being skipped
+		// when they are retrieved by the API based on timestamp.
+		post.CreateAt = cfg.CreateTime + int64(cfg.postsCreated)
+	}
+	if len(cfg.UsersToPostFrom) != 0 {
+		i := utils.RandIntFromRange(utils.Range{Begin: 0, End: len(cfg.UsersToPostFrom)})
+		if i < len(cfg.UsersToPostFrom) {
+			post.UserId = cfg.UsersToPostFrom[i]
+		}
+	}
+	rpost, err := cfg.a.CreatePostMissingChannel(c, post, true, true)
+	if err != nil {
+		return nil, err
+	}
+
+	cfg.postsCreated += 1
+
+	return rpost, nil
+}