Support remote files API

examples/remotefiles/remotefiles.go

@@ -0,0 +1,75 @@
+package main
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/slack-go/slack"
+)
+
+func main() {
+	api := slack.New("YOUR_TOKEN_HERE")
+	r, err := os.Open("slack-go.png")
+	if err != nil {
+		fmt.Printf("%s\n", err)
+		return
+	}
+	defer r.Close()
+	remotefile, err := api.AddRemoteFile(slack.RemoteFileParameters{
+		ExternalID:            "slack-go",
+		ExternalURL:           "https://github.com/slack-go/slack",
+		Title:                 "slack-go",
+		Filetype:              "go",
+		IndexableFileContents: "golang, slack",
+		// PreviewImage:          "slack-go.png",
+		PreviewImageReader: r,
+	})
+	if err != nil {
+		fmt.Printf("add remote file failed: %s\n", err)
+		return
+	}
+	fmt.Printf("remote file: %v\n", remotefile)
+
+	_, err = api.ShareRemoteFile([]string{"CPB8DC1CM"}, remotefile.ExternalID, "")
+	if err != nil {
+		fmt.Printf("share remote file failed: %s\n", err)
+		return
+	}
+	fmt.Printf("share remote file %s successfully.\n", remotefile.Name)
+
+	remotefiles, _, err := api.ListRemoteFiles(slack.ListRemoteFilesParameters{
+		Channel: "YOUR_CHANNEL_HERE",
+	})
+	if err != nil {
+		fmt.Printf("list remote files failed: %s\n", err)
+		return
+	}
+	fmt.Printf("remote files: %v\n", remotefiles)
+
+	remotefile, err = api.UpdateRemoteFile(remotefile.ID, slack.RemoteFileParameters{
+		ExternalID:            "slack-go",
+		ExternalURL:           "https://github.com/slack-go/slack",
+		Title:                 "slack-go",
+		Filetype:              "go",
+		IndexableFileContents: "golang, slack, github",
+	})
+	if err != nil {
+		fmt.Printf("update remote file failed: %s\n", err)
+		return
+	}
+	fmt.Printf("remote file: %v\n", remotefile)
+
+	info, err := api.GetRemoteFileInfo(remotefile.ExternalID, "")
+	if err != nil {
+		fmt.Printf("get remote file info failed: %s\n", err)
+		return
+	}
+	fmt.Printf("remote file info: %v\n", info)
+
+	err = api.RemoveRemoteFile(remotefile.ExternalID, "")
+	if err != nil {
+		fmt.Printf("remove remote file failed: %s\n", err)
+		return
+	}
+	fmt.Printf("remote file %s deleted successfully.\n", remotefile.Name)
+}

remotefiles.go

@@ -0,0 +1,293 @@
+package slack
+
+import (
+	"context"
+	"fmt"
+	"io"
+	"net/url"
+	"strconv"
+	"strings"
+)
+
+const (
+	DEFAULT_REMOTE_FILES_CHANNEL = ""
+	DEFAULT_REMOTE_FILES_TS_FROM = 0
+	DEFAULT_REMOTE_FILES_TS_TO   = -1
+	DEFAULT_REMOTE_FILES_COUNT   = 100
+)
+
+// RemoteFile contains all the information for a remote file
+// More information can be found here: https://api.slack.com/messaging/files/remote
+type RemoteFile struct {
+	ID              string   `json:"id"`
+	Created         JSONTime `json:"created"`
+	Timestamp       JSONTime `json:"timestamp"`
+	Name            string   `json:"name"`
+	Title           string   `json:"title"`
+	Mimetype        string   `json:"mimetype"`
+	Filetype        string   `json:"filetype"`
+	PrettyType      string   `json:"pretty_type"`
+	User            string   `json:"user"`
+	Editable        bool     `json:"editable"`
+	Size            int      `json:"size"`
+	Mode            string   `json:"mode"`
+	IsExternal      bool     `json:"is_external"`
+	ExternalType    string   `json:"external_type"`
+	IsPublic        bool     `json:"is_public"`
+	PublicURLShared bool     `json:"public_url_shared"`
+	DisplayAsBot    bool     `json:"display_as_bot"`
+	Username        string   `json:"username"`
+	URLPrivate      string   `json:"url_private"`
+	Permalink       string   `json:"permalink"`
+	CommentsCount   int      `json:"comments_count"`
+	IsStarred       bool     `json:"is_starred"`
+	Shares          Share    `json:"shares"`
+	Channels        []string `json:"channels"`
+	Groups          []string `json:"groups"`
+	IMs             []string `json:"ims"`
+	ExternalID      string   `json:"external_id"`
+	ExternalURL     string   `json:"external_url"`
+	HasRichPreview  bool     `json:"has_rich_preview"`
+}
+
+// RemoteFileParameters contains required and optional parameters for a remote file.
+//
+// ExternalID is a user defined GUID, ExternalURL is where the remote file can be accessed,
+// and Title is the name of the file.
+//
+// More information can be found here: https://api.slack.com/methods/files.remote.add
+type RemoteFileParameters struct {
+	ExternalID            string // required
+	ExternalURL           string // required
+	Title                 string // required
+	Filetype              string
+	IndexableFileContents string
+	PreviewImage          string
+	PreviewImageReader    io.Reader
+}
+
+type ListRemoteFilesParameters struct {
+	Channel       string
+	Cursor        string
+	Limit         int
+	TimestampFrom JSONTime
+	TimestampTo   JSONTime
+}
+
+type remoteFileResponseFull struct {
+	RemoteFile `json:"file"`
+	Paging     `json:"paging"`
+	Files      []RemoteFile `json:"files"`
+	SlackResponse
+}
+
+func (api *Client) remoteFileRequest(ctx context.Context, path string, values url.Values) (*remoteFileResponseFull, error) {
+	response := &remoteFileResponseFull{}
+	err := api.postMethod(ctx, path, values, response)
+	if err != nil {
+		return nil, err
+	}
+
+	return response, response.Err()
+}
+
+// AddRemoteFile adds a remote file. Unlike regular files, remote files must be explicitly shared.
+func (api *Client) AddRemoteFile(params RemoteFileParameters) (*RemoteFile, error) {
+	return api.AddRemoteFileContext(context.Background(), params)
+}
+
+// AddRemoteFileContext adds a remote file and setting a custom context
+func (api *Client) AddRemoteFileContext(ctx context.Context, params RemoteFileParameters) (remotefile *RemoteFile, err error) {
+	if params.ExternalID == "" || params.ExternalURL == "" || params.Title == "" {
+		return nil, ErrParametersMissing
+	}
+	response := &remoteFileResponseFull{}
+	values := url.Values{
+		"token":        {api.token},
+		"external_id":  {params.ExternalID},
+		"external_url": {params.ExternalURL},
+		"title":        {params.Title},
+	}
+	if params.Filetype != "" {
+		values.Add("filetype", params.Filetype)
+	}
+	if params.IndexableFileContents != "" {
+		values.Add("indexable_file_contents", params.IndexableFileContents)
+	}
+	if params.PreviewImage != "" {
+		err = postLocalWithMultipartResponse(ctx, api.httpclient, api.endpoint+"files.remote.add", params.PreviewImage, "preview_image", api.token, values, response, api)
+	} else if params.PreviewImageReader != nil {
+		err = postWithMultipartResponse(ctx, api.httpclient, api.endpoint+"files.remote.add", "preview.png", "preview_image", api.token, values, params.PreviewImageReader, response, api)
+	} else {
+		response, err = api.remoteFileRequest(ctx, "files.remote.add", values)
+	}
+
+	if err != nil {
+		return nil, err
+	}
+
+	return &response.RemoteFile, response.Err()
+}
+
+// ListRemoteFiles retrieves all remote files according to the parameters given. Uses cursor based pagination.
+func (api *Client) ListRemoteFiles(params ListRemoteFilesParameters) ([]RemoteFile, *ListRemoteFilesParameters, error) {
+	return api.ListRemoteFilesContext(context.Background(), params)
+}
+
+// ListRemoteFilesContext retrieves all remote files according to the parameters given with a custom context. Uses cursor based pagination.
+func (api *Client) ListRemoteFilesContext(ctx context.Context, params ListRemoteFilesParameters) ([]RemoteFile, *ListRemoteFilesParameters, error) {
+	values := url.Values{
+		"token": {api.token},
+	}
+	if params.Channel != DEFAULT_REMOTE_FILES_CHANNEL {
+		values.Add("channel", params.Channel)
+	}
+	if params.TimestampFrom != DEFAULT_REMOTE_FILES_TS_FROM {
+		values.Add("ts_from", strconv.FormatInt(int64(params.TimestampFrom), 10))
+	}
+	if params.TimestampTo != DEFAULT_REMOTE_FILES_TS_TO {
+		values.Add("ts_to", strconv.FormatInt(int64(params.TimestampTo), 10))
+	}
+	if params.Limit != DEFAULT_REMOTE_FILES_COUNT {
+		values.Add("limit", strconv.Itoa(params.Limit))
+	}
+	if params.Cursor != "" {
+		values.Add("cursor", params.Cursor)
+	}
+
+	response, err := api.remoteFileRequest(ctx, "files.remote.list", values)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	params.Cursor = response.SlackResponse.ResponseMetadata.Cursor
+
+	return response.Files, &params, nil
+}
+
+// GetRemoteFileInfo retrieves the complete remote file information.
+func (api *Client) GetRemoteFileInfo(externalID, fileID string) (remotefile *RemoteFile, err error) {
+	return api.GetRemoteFileInfoContext(context.Background(), externalID, fileID)
+}
+
+// GetRemoteFileInfoContext retrieves the complete remote file information given with a custom context.
+func (api *Client) GetRemoteFileInfoContext(ctx context.Context, externalID, fileID string) (remotefile *RemoteFile, err error) {
+	if fileID == "" && externalID == "" {
+		return nil, fmt.Errorf("either externalID or fileID is required")
+	}
+	if fileID != "" && externalID != "" {
+		return nil, fmt.Errorf("don't provide both externalID and fileID")
+	}
+	values := url.Values{
+		"token": {api.token},
+	}
+	if fileID != "" {
+		values.Add("file", fileID)
+	}
+	if externalID != "" {
+		values.Add("external_id", externalID)
+	}
+	response, err := api.remoteFileRequest(ctx, "files.remote.info", values)
+	if err != nil {
+		return nil, err
+	}
+	return &response.RemoteFile, err
+}
+
+// ShareRemoteFile shares a remote file to channels
+func (api *Client) ShareRemoteFile(channels []string, externalID, fileID string) (file *RemoteFile, err error) {
+	return api.ShareRemoteFileContext(context.Background(), channels, externalID, fileID)
+}
+
+// ShareRemoteFileContext shares a remote file to channels with a custom context
+func (api *Client) ShareRemoteFileContext(ctx context.Context, channels []string, externalID, fileID string) (file *RemoteFile, err error) {
+	if channels == nil || len(channels) == 0 {
+		return nil, ErrParametersMissing
+	}
+	if fileID == "" && externalID == "" {
+		return nil, fmt.Errorf("either externalID or fileID is required")
+	}
+	values := url.Values{
+		"token":    {api.token},
+		"channels": {strings.Join(channels, ",")},
+	}
+	if fileID != "" {
+		values.Add("file", fileID)
+	}
+	if externalID != "" {
+		values.Add("external_id", externalID)
+	}
+	response, err := api.remoteFileRequest(ctx, "files.remote.share", values)
+	if err != nil {
+		return nil, err
+	}
+	return &response.RemoteFile, err
+}
+
+// UpdateRemoteFile updates a remote file
+func (api *Client) UpdateRemoteFile(fileID string, params RemoteFileParameters) (remotefile *RemoteFile, err error) {
+	return api.UpdateRemoteFileContext(context.Background(), fileID, params)
+}
+
+// UpdateRemoteFileContext updates a remote file with a custom context
+func (api *Client) UpdateRemoteFileContext(ctx context.Context, fileID string, params RemoteFileParameters) (remotefile *RemoteFile, err error) {
+	response := &remoteFileResponseFull{}
+	values := url.Values{
+		"token": {api.token},
+	}
+	if fileID != "" {
+		values.Add("file", fileID)
+	}
+	if params.ExternalID != "" {
+		values.Add("external_id", params.ExternalID)
+	}
+	if params.ExternalURL != "" {
+		values.Add("external_url", params.ExternalURL)
+	}
+	if params.Title != "" {
+		values.Add("title", params.Title)
+	}
+	if params.Filetype != "" {
+		values.Add("filetype", params.Filetype)
+	}
+	if params.IndexableFileContents != "" {
+		values.Add("indexable_file_contents", params.IndexableFileContents)
+	}
+	if params.PreviewImageReader != nil {
+		err = postWithMultipartResponse(ctx, api.httpclient, api.endpoint+"files.remote.update", "preview.png", "preview_image", api.token, values, params.PreviewImageReader, response, api)
+	} else {
+		response, err = api.remoteFileRequest(ctx, "files.remote.update", values)
+	}
+
+	if err != nil {
+		return nil, err
+	}
+
+	return &response.RemoteFile, response.Err()
+}
+
+// RemoveRemoteFile removes a remote file
+func (api *Client) RemoveRemoteFile(externalID, fileID string) (err error) {
+	return api.RemoveRemoteFileContext(context.Background(), externalID, fileID)
+}
+
+// RemoveRemoteFileContext removes a remote file with a custom context
+func (api *Client) RemoveRemoteFileContext(ctx context.Context, externalID, fileID string) (err error) {
+	if fileID == "" && externalID == "" {
+		return fmt.Errorf("either externalID or fileID is required")
+	}
+	if fileID != "" && externalID != "" {
+		return fmt.Errorf("don't provide both externalID and fileID")
+	}
+	values := url.Values{
+		"token": {api.token},
+	}
+	if fileID != "" {
+		values.Add("file", fileID)
+	}
+	if externalID != "" {
+		values.Add("external_id", externalID)
+	}
+	_, err = api.remoteFileRequest(ctx, "files.remote.remove", values)
+	return err
+}