[APIV4] POST /teams/{team_id}/import for apiv4 (#5920)

5 files changed, 230 insertions, 0 deletions

diff --git a/api4/team.go b/api4/team.go
index 4bca56994..85a083ee1 100644
--- a/api4/team.go
+++ b/api4/team.go
@@ -4,7 +4,10 @@
 package api4
 
 import (
+	"bytes"
+	"io"
 	"net/http"
+	"strconv"
 
 	l4g "github.com/alecthomas/log4go"
 	"github.com/mattermost/platform/app"
@@ -36,6 +39,8 @@ func InitTeam() {
 	BaseRoutes.TeamMember.Handle("", ApiSessionRequired(getTeamMember)).Methods("GET")
 	BaseRoutes.TeamByName.Handle("/exists", ApiSessionRequired(teamExists)).Methods("GET")
 	BaseRoutes.TeamMember.Handle("/roles", ApiSessionRequired(updateTeamMemberRoles)).Methods("PUT")
+
+	BaseRoutes.Team.Handle("/import", ApiSessionRequired(importTeam)).Methods("POST")
 }
 
 func createTeam(c *Context, w http.ResponseWriter, r *http.Request) {
@@ -468,3 +473,77 @@ func teamExists(c *Context, w http.ResponseWriter, r *http.Request) {
 	w.Write([]byte(model.MapBoolToJson(resp)))
 	return
 }
+
+func importTeam(c *Context, w http.ResponseWriter, r *http.Request) {
+	c.RequireTeamId()
+	if c.Err != nil {
+		return
+	}
+
+	if !app.SessionHasPermissionToTeam(c.Session, c.Params.TeamId, model.PERMISSION_IMPORT_TEAM) {
+		c.SetPermissionError(model.PERMISSION_IMPORT_TEAM)
+		return
+	}
+
+	if err := r.ParseMultipartForm(10000000); err != nil {
+		c.Err = model.NewLocAppError("importTeam", "api.team.import_team.parse.app_error", nil, err.Error())
+		return
+	}
+
+	importFromArray, ok := r.MultipartForm.Value["importFrom"]
+	importFrom := importFromArray[0]
+
+	fileSizeStr, ok := r.MultipartForm.Value["filesize"]
+	if !ok {
+		c.Err = model.NewLocAppError("importTeam", "api.team.import_team.unavailable.app_error", nil, "")
+		c.Err.StatusCode = http.StatusBadRequest
+		return
+	}
+
+	fileSize, err := strconv.ParseInt(fileSizeStr[0], 10, 64)
+	if err != nil {
+		c.Err = model.NewLocAppError("importTeam", "api.team.import_team.integer.app_error", nil, "")
+		c.Err.StatusCode = http.StatusBadRequest
+		return
+	}
+
+	fileInfoArray, ok := r.MultipartForm.File["file"]
+	if !ok {
+		c.Err = model.NewLocAppError("importTeam", "api.team.import_team.no_file.app_error", nil, "")
+		c.Err.StatusCode = http.StatusBadRequest
+		return
+	}
+
+	if len(fileInfoArray) <= 0 {
+		c.Err = model.NewLocAppError("importTeam", "api.team.import_team.array.app_error", nil, "")
+		c.Err.StatusCode = http.StatusBadRequest
+		return
+	}
+
+	fileInfo := fileInfoArray[0]
+
+	fileData, err := fileInfo.Open()
+	defer fileData.Close()
+	if err != nil {
+		c.Err = model.NewLocAppError("importTeam", "api.team.import_team.open.app_error", nil, err.Error())
+		c.Err.StatusCode = http.StatusBadRequest
+		return
+	}
+
+	var log *bytes.Buffer
+	switch importFrom {
+	case "slack":
+		var err *model.AppError
+		if err, log = app.SlackImport(fileData, fileSize, c.Params.TeamId); err != nil {
+			c.Err = err
+			c.Err.StatusCode = http.StatusBadRequest
+		}
+	}
+
+	w.Header().Set("Content-Disposition", "attachment; filename=MattermostImportLog.txt")
+	w.Header().Set("Content-Type", "application/octet-stream")
+	if c.Err != nil {
+		w.WriteHeader(c.Err.StatusCode)
+	}
+	io.Copy(w, bytes.NewReader(log.Bytes()))
+}
diff --git a/api4/team_test.go b/api4/team_test.go
index a38acf2e6..6127919c1 100644
--- a/api4/team_test.go
+++ b/api4/team_test.go
@@ -4,9 +4,11 @@
 package api4
 
 import (
+	"encoding/binary"
 	"fmt"
 	"net/http"
 	"strconv"
+	"strings"
 	"testing"
 
 	"github.com/mattermost/platform/app"
@@ -1047,3 +1049,77 @@ func TestTeamExists(t *testing.T) {
 	_, resp = Client.TeamExists(team.Name, "")
 	CheckUnauthorizedStatus(t, resp)
 }
+
+func TestImportTeam(t *testing.T) {
+	th := Setup().InitBasic().InitSystemAdmin()
+	defer TearDown()
+
+	t.Run("ImportTeam", func(t *testing.T) {
+		var data []byte
+		var err error
+		data, err = readTestFile("Fake_Team_Import.zip")
+		if err != nil && len(data) == 0 {
+			t.Fatal("Error while reading the test file.")
+		}
+
+		// Import the channels/users/posts
+		fileResp, resp := th.SystemAdminClient.ImportTeam(data, binary.Size(data), "slack", "Fake_Team_Import.zip", th.BasicTeam.Id)
+		CheckNoError(t, resp)
+
+		fileReturned := fmt.Sprintf("%s", fileResp)
+		if !strings.Contains(fileReturned, "darth.vader@stardeath.com") {
+			t.Log(fileReturned)
+			t.Fatal("failed to report the user was imported")
+		}
+
+		// Checking the imported users
+		importedUser, resp := th.SystemAdminClient.GetUserByUsername("bot_test", "")
+		CheckNoError(t, resp)
+		if importedUser.Username != "bot_test" {
+			t.Fatal("username should match with the imported user")
+		}
+
+		importedUser, resp = th.SystemAdminClient.GetUserByUsername("lordvader", "")
+		CheckNoError(t, resp)
+		if importedUser.Username != "lordvader" {
+			t.Fatal("username should match with the imported user")
+		}
+
+		// Checking the imported Channels
+		importedChannel, resp := th.SystemAdminClient.GetChannelByName("testchannel", th.BasicTeam.Id, "")
+		CheckNoError(t, resp)
+		if importedChannel.Name != "testchannel" {
+			t.Fatal("names did not match expected: testchannel")
+		}
+
+		importedChannel, resp = th.SystemAdminClient.GetChannelByName("general", th.BasicTeam.Id, "")
+		CheckNoError(t, resp)
+		if importedChannel.Name != "general" {
+			t.Fatal("names did not match expected: general")
+		}
+
+		posts, resp := th.SystemAdminClient.GetPostsForChannel(importedChannel.Id, 0, 60, "")
+		CheckNoError(t, resp)
+		if posts.Posts[posts.Order[3]].Message != "This is a test post to test the import process" {
+			t.Fatal("missing posts in the import process")
+		}
+	})
+
+	t.Run("MissingFile", func(t *testing.T) {
+		_, resp := th.SystemAdminClient.ImportTeam(nil, 4343, "slack", "Fake_Team_Import.zip", th.BasicTeam.Id)
+		CheckBadRequestStatus(t, resp)
+	})
+
+	t.Run("WrongPermission", func(t *testing.T) {
+		var data []byte
+		var err error
+		data, err = readTestFile("Fake_Team_Import.zip")
+		if err != nil && len(data) == 0 {
+			t.Fatal("Error while reading the test file.")
+		}
+
+		// Import the channels/users/posts
+		_, resp := th.Client.ImportTeam(data, binary.Size(data), "slack", "Fake_Team_Import.zip", th.BasicTeam.Id)
+		CheckForbiddenStatus(t, resp)
+	})
+}
diff --git a/i18n/en.json b/i18n/en.json
index cd10197ae..2a9c8309a 100644
--- a/i18n/en.json
+++ b/i18n/en.json
@@ -3740,6 +3740,26 @@
     "translation": "Error creating SAML certificate multipart form request"
   },
   {
+    "id": "model.client.upload_post_attachment.writer.app_error",
+    "translation": "Error closing multipart writer"
+  },
+  {
+    "id": "model.client.upload_post_attachment.file.app_error",
+    "translation": "Error writing file to multipart form"
+  },
+  {
+    "id": "model.client.upload_post_attachment.channel_id.app_error",
+    "translation": "Error writing channel id to multipart form"
+  },
+  {
+    "id": "model.client.upload_post_attachment.import_from.app_error",
+    "translation": "Error writing importFrom to multipart form"
+  },
+  {
+    "id": "model.client.upload_post_attachment.file_size.app_error",
+    "translation": "Error writing fileSize to multipart form"
+  },
+  {
     "id": "model.command.is_valid.create_at.app_error",
     "translation": "Create at must be a valid time"
   },
diff --git a/model/client4.go b/model/client4.go
index c542851e9..0123b4252 100644
--- a/model/client4.go
+++ b/model/client4.go
@@ -94,6 +94,10 @@ func (c *Client4) GetTeamStatsRoute(teamId string) string {
 	return fmt.Sprintf(c.GetTeamRoute(teamId) + "/stats")
 }
 
+func (c *Client4) GetTeamImportRoute(teamId string) string {
+	return fmt.Sprintf(c.GetTeamRoute(teamId) + "/import")
+}
+
 func (c *Client4) GetChannelsRoute() string {
 	return fmt.Sprintf("/channels")
 }
@@ -277,6 +281,27 @@ func (c *Client4) DoUploadFile(url string, data []byte, contentType string) (*Fi
 	}
 }
 
+func (c *Client4) DoUploadImportTeam(url string, data []byte, contentType string) ([]byte, *Response) {
+	rq, _ := http.NewRequest("POST", c.ApiUrl+url, bytes.NewReader(data))
+	rq.Header.Set("Content-Type", contentType)
+	rq.Close = true
+
+	if len(c.AuthToken) > 0 {
+		rq.Header.Set(HEADER_AUTH, c.AuthType+" "+c.AuthToken)
+	}
+
+	if rp, err := c.HttpClient.Do(rq); err != nil {
+		return nil, &Response{Error: NewAppError(url, "model.client.connecting.app_error", nil, err.Error(), 0)}
+	} else if rp.StatusCode >= 300 {
+		return nil, &Response{StatusCode: rp.StatusCode, Error: AppErrorFromJson(rp.Body)}
+	} else if data, err := ioutil.ReadAll(rp.Body); err != nil {
+		return nil, &Response{StatusCode: rp.StatusCode, Error: NewAppError("UploadImportTeam", "model.client.read_file.app_error", nil, err.Error(), rp.StatusCode)}
+	} else {
+		defer closeBody(rp)
+		return data, BuildResponse(rp)
+	}
+}
+
 // CheckStatusOK is a convenience function for checking the standard OK response
 // from the web service.
 func CheckStatusOK(r *http.Response) bool {
@@ -966,6 +991,36 @@ func (c *Client4) GetTeamUnread(teamId, userId string) (*TeamUnread, *Response)
 	}
 }
 
+// ImportTeam will import an exported team from other app into a existing team.
+func (c *Client4) ImportTeam(data []byte, filesize int, importFrom, filename, teamId string) ([]byte, *Response) {
+	body := &bytes.Buffer{}
+	writer := multipart.NewWriter(body)
+
+	if part, err := writer.CreateFormFile("file", filename); err != nil {
+		return nil, &Response{Error: NewAppError("UploadImportTeam", "model.client.upload_post_attachment.file.app_error", nil, err.Error(), http.StatusBadRequest)}
+	} else if _, err = io.Copy(part, bytes.NewBuffer(data)); err != nil {
+		return nil, &Response{Error: NewAppError("UploadImportTeam", "model.client.upload_post_attachment.file.app_error", nil, err.Error(), http.StatusBadRequest)}
+	}
+
+	if part, err := writer.CreateFormField("filesize"); err != nil {
+		return nil, &Response{Error: NewAppError("UploadImportTeam", "model.client.upload_post_attachment.file_size.app_error", nil, err.Error(), http.StatusBadRequest)}
+	} else if _, err = io.Copy(part, strings.NewReader(strconv.Itoa(filesize))); err != nil {
+		return nil, &Response{Error: NewAppError("UploadImportTeam", "model.client.upload_post_attachment.file_size.app_error", nil, err.Error(), http.StatusBadRequest)}
+	}
+
+	if part, err := writer.CreateFormField("importFrom"); err != nil {
+		return nil, &Response{Error: NewAppError("UploadImportTeam", "model.client.upload_post_attachment.import_from.app_error", nil, err.Error(), http.StatusBadRequest)}
+	} else if _, err = io.Copy(part, strings.NewReader(importFrom)); err != nil {
+		return nil, &Response{Error: NewAppError("UploadImportTeam", "model.client.upload_post_attachment.import_from.app_error", nil, err.Error(), http.StatusBadRequest)}
+	}
+
+	if err := writer.Close(); err != nil {
+		return nil, &Response{Error: NewAppError("UploadImportTeam", "model.client.upload_post_attachment.writer.app_error", nil, err.Error(), http.StatusBadRequest)}
+	}
+
+	return c.DoUploadImportTeam(c.GetTeamImportRoute(teamId), body.Bytes(), writer.FormDataContentType())
+}
+
 // Channel Section
 
 // CreateChannel creates a channel based on the provided channel struct.
diff --git a/tests/Fake_Team_Import.zip b/tests/Fake_Team_Import.zip
new file mode 100644
index 000000000..429f4374f
--- /dev/null
+++ b/tests/Fake_Team_Import.zip