-
Notifications
You must be signed in to change notification settings - Fork 1.7k
/
translate.go
99 lines (89 loc) · 2.79 KB
/
translate.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
// Copyright 2022 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// [START functions_ocr_translate]
package ocr
import (
"context"
"encoding/json"
"fmt"
"log"
"cloud.google.com/go/pubsub"
"cloud.google.com/go/translate"
"github.com/GoogleCloudPlatform/functions-framework-go/functions"
"github.com/cloudevents/sdk-go/v2/event"
)
func init() {
functions.CloudEvent("translate-text", TranslateText)
}
// TranslateText is executed when a message is published to the Cloud Pub/Sub
// topic specified by the TRANSLATE_TOPIC environment variable, and translates
// the text using the Google Translate API.
func TranslateText(ctx context.Context, cloudevent event.Event) error {
var event MessagePublishedData
if err := setup(ctx); err != nil {
return fmt.Errorf("setup: %w", err)
}
if err := cloudevent.DataAs(&event); err != nil {
return fmt.Errorf("Failed to parse CloudEvent data: %w", err)
}
if event.Message.Data == nil {
log.Printf("event: %s", event)
return fmt.Errorf("empty data")
}
var message ocrMessage
if err := json.Unmarshal(event.Message.Data, &message); err != nil {
return fmt.Errorf("json.Unmarshal: %w", err)
}
log.Printf("Translating text into %s.", message.Lang.String())
opts := translate.Options{
Source: message.SrcLang,
}
translateResponse, err := translateClient.Translate(ctx, []string{message.Text}, message.Lang, &opts)
if err != nil {
return fmt.Errorf("Translate: %w", err)
}
if len(translateResponse) == 0 {
return fmt.Errorf("Empty Translate response")
}
translatedText := translateResponse[0]
messageData, err := json.Marshal(ocrMessage{
Text: translatedText.Text,
FileName: message.FileName,
Lang: message.Lang,
SrcLang: message.SrcLang,
})
if err != nil {
return fmt.Errorf("json.Marshal: %w", err)
}
topic := pubsubClient.Topic(resultTopic)
ok, err := topic.Exists(ctx)
if err != nil {
return fmt.Errorf("Exists: %w", err)
}
if !ok {
topic, err = pubsubClient.CreateTopic(ctx, resultTopic)
if err != nil {
return fmt.Errorf("CreateTopic: %w", err)
}
}
msg := &pubsub.Message{
Data: messageData,
}
if _, err = topic.Publish(ctx, msg).Get(ctx); err != nil {
return fmt.Errorf("Get: %w", err)
}
log.Printf("Sent translation: %q", translatedText.Text)
return nil
}
// [END functions_ocr_translate]