forked from vartanbeno/go-reddit
/
emoji.go
278 lines (228 loc) · 7.13 KB
/
emoji.go
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package reddit
import (
"bytes"
"context"
"encoding/json"
"errors"
"fmt"
"io"
"mime/multipart"
"net/http"
"net/url"
"os"
"strconv"
"strings"
"github.com/google/go-querystring/query"
"golang.org/x/net/context/ctxhttp"
)
// EmojiService handles communication with the emoji
// related methods of the Reddit API.
//
// Reddit API docs: https://www.reddit.com/dev/api/#section_emoji
type EmojiService struct {
client *Client
}
// Emoji is a graphic element you can include in a post flair or user flair.
type Emoji struct {
Name string `json:"name,omitempty"`
URL string `json:"url,omitempty"`
UserFlairAllowed bool `json:"user_flair_allowed,omitempty"`
PostFlairAllowed bool `json:"post_flair_allowed,omitempty"`
ModFlairOnly bool `json:"mod_flair_only,omitempty"`
// ID of the user who created this emoji.
CreatedBy string `json:"created_by,omitempty"`
}
// EmojiCreateOrUpdateRequest represents a request to create/update an emoji.
type EmojiCreateOrUpdateRequest struct {
Name string `url:"name"`
UserFlairAllowed *bool `url:"user_flair_allowed,omitempty"`
PostFlairAllowed *bool `url:"post_flair_allowed,omitempty"`
ModFlairOnly *bool `url:"mod_flair_only,omitempty"`
}
func (r *EmojiCreateOrUpdateRequest) validate() error {
if r == nil {
return errors.New("*EmojiCreateOrUpdateRequest: cannot be nil")
}
if r.Name == "" {
return errors.New("(*EmojiCreateOrUpdateRequest).Name: cannot be empty")
}
return nil
}
type emojis []*Emoji
func (e *emojis) UnmarshalJSON(data []byte) (err error) {
emojiMap := make(map[string]json.RawMessage)
err = json.Unmarshal(data, &emojiMap)
if err != nil {
return
}
*e = make(emojis, 0, len(emojiMap))
for emojiName, emojiValue := range emojiMap {
emoji := new(Emoji)
err = json.Unmarshal(emojiValue, emoji)
if err != nil {
return
}
emoji.Name = emojiName
*e = append(*e, emoji)
}
return
}
// Get the default set of Reddit emojis and those of the subreddit, respectively.
func (s *EmojiService) Get(ctx context.Context, subreddit string) ([]*Emoji, []*Emoji, *Response, error) {
path := fmt.Sprintf("api/v1/%s/emojis/all", subreddit)
req, err := s.client.NewRequest(http.MethodGet, path, nil)
if err != nil {
return nil, nil, nil, err
}
root := make(map[string]emojis)
resp, err := s.client.Do(ctx, req, &root)
if err != nil {
return nil, nil, resp, err
}
defaultEmojis := root["snoomojis"]
var subredditEmojis []*Emoji
for k, v := range root {
if strings.HasPrefix(k, kindSubreddit) {
subredditEmojis = v
break
}
}
return defaultEmojis, subredditEmojis, resp, nil
}
// Delete the emoji from the subreddit.
func (s *EmojiService) Delete(ctx context.Context, subreddit string, emoji string) (*Response, error) {
path := fmt.Sprintf("api/v1/%s/emoji/%s", subreddit, emoji)
req, err := s.client.NewRequest(http.MethodDelete, path, nil)
if err != nil {
return nil, err
}
return s.client.Do(ctx, req, nil)
}
// SetSize sets the custom emoji size in the subreddit.
// Both height and width must be between 1 and 40 (inclusive).
func (s *EmojiService) SetSize(ctx context.Context, subreddit string, height, width int) (*Response, error) {
path := fmt.Sprintf("api/v1/%s/emoji_custom_size", subreddit)
form := url.Values{}
form.Set("height", strconv.Itoa(height))
form.Set("width", strconv.Itoa(width))
req, err := s.client.NewRequest(http.MethodPost, path, form)
if err != nil {
return nil, err
}
return s.client.Do(ctx, req, nil)
}
// DisableCustomSize disables the custom emoji size in the subreddit.
func (s *EmojiService) DisableCustomSize(ctx context.Context, subreddit string) (*Response, error) {
path := fmt.Sprintf("api/v1/%s/emoji_custom_size", subreddit)
req, err := s.client.NewRequest(http.MethodPost, path, nil)
if err != nil {
return nil, err
}
return s.client.Do(ctx, req, nil)
}
func (s *EmojiService) lease(ctx context.Context, subreddit, imagePath string) (string, map[string]string, *Response, error) {
path := fmt.Sprintf("api/v1/%s/emoji_asset_upload_s3.json", subreddit)
form := url.Values{}
form.Set("filepath", imagePath)
form.Set("mimetype", "image/jpeg")
if strings.HasSuffix(strings.ToLower(imagePath), ".png") {
form.Set("mimetype", "image/png")
}
req, err := s.client.NewRequest(http.MethodPost, path, form)
if err != nil {
return "", nil, nil, err
}
var response struct {
S3UploadLease struct {
Action string `json:"action"`
Fields []struct {
Name string `json:"name"`
Value string `json:"value"`
} `json:"fields"`
} `json:"s3UploadLease"`
}
resp, err := s.client.Do(ctx, req, &response)
if err != nil {
return "", nil, resp, err
}
uploadURL := fmt.Sprintf("http:%s", response.S3UploadLease.Action)
fields := make(map[string]string)
for _, field := range response.S3UploadLease.Fields {
fields[field.Name] = field.Value
}
return uploadURL, fields, resp, nil
}
func (s *EmojiService) upload(ctx context.Context, subreddit string, createRequest *EmojiCreateOrUpdateRequest, awsKey string) (*Response, error) {
path := fmt.Sprintf("api/v1/%s/emoji.json", subreddit)
form, err := query.Values(createRequest)
if err != nil {
return nil, err
}
form.Set("s3_key", awsKey)
req, err := s.client.NewRequest(http.MethodPost, path, form)
if err != nil {
return nil, err
}
return s.client.Do(ctx, req, nil)
}
// Upload an emoji to the subreddit.
func (s *EmojiService) Upload(ctx context.Context, subreddit string, createRequest *EmojiCreateOrUpdateRequest, imagePath string) (*Response, error) {
err := createRequest.validate()
if err != nil {
return nil, err
}
uploadURL, fields, resp, err := s.lease(ctx, subreddit, imagePath)
if err != nil {
return resp, err
}
file, err := os.Open(imagePath)
if err != nil {
return nil, err
}
defer file.Close()
body := new(bytes.Buffer)
writer := multipart.NewWriter(body)
// AWS ignores all fields in the request that come after the file field, so we need to set these before
// https://stackoverflow.com/questions/15234496/upload-directly-to-amazon-s3-using-ajax-returning-error-bucket-post-must-contai/15235866#15235866
for k, v := range fields {
writer.WriteField(k, v)
}
part, err := writer.CreateFormFile("file", file.Name())
if err != nil {
return nil, err
}
_, err = io.Copy(part, file)
if err != nil {
return nil, err
}
err = writer.Close()
if err != nil {
return nil, err
}
httpResponse, err := ctxhttp.Post(ctx, nil, uploadURL, writer.FormDataContentType(), body)
if err != nil {
return nil, err
}
err = CheckResponse(httpResponse)
if err != nil {
return newResponse(httpResponse), err
}
return s.upload(ctx, subreddit, createRequest, fields["key"])
}
// Update updates an emoji on the subreddit.
func (s *EmojiService) Update(ctx context.Context, subreddit string, updateRequest *EmojiCreateOrUpdateRequest) (*Response, error) {
err := updateRequest.validate()
if err != nil {
return nil, err
}
path := fmt.Sprintf("api/v1/%s/emoji_permissions", subreddit)
form, err := query.Values(updateRequest)
if err != nil {
return nil, err
}
req, err := s.client.NewRequest(http.MethodPost, path, form)
if err != nil {
return nil, err
}
return s.client.Do(ctx, req, nil)
}