92 lines
2.7 KiB
Go
92 lines
2.7 KiB
Go
/*
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* Copyright 2025 coze-dev Authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package builtin
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import (
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"context"
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"encoding/base64"
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"fmt"
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"io"
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"github.com/cloudwego/eino/components/document/parser"
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"github.com/cloudwego/eino/schema"
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"github.com/coze-dev/coze-studio/backend/infra/contract/chatmodel"
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contract "github.com/coze-dev/coze-studio/backend/infra/contract/document/parser"
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"github.com/coze-dev/coze-studio/backend/pkg/errorx"
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"github.com/coze-dev/coze-studio/backend/types/errno"
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)
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func parseImage(config *contract.Config, model chatmodel.BaseChatModel) parseFn {
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return func(ctx context.Context, reader io.Reader, opts ...parser.Option) (docs []*schema.Document, err error) {
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options := parser.GetCommonOptions(&parser.Options{}, opts...)
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doc := &schema.Document{
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MetaData: map[string]any{},
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}
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for k, v := range options.ExtraMeta {
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doc.MetaData[k] = v
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}
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switch config.ParsingStrategy.ImageAnnotationType {
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case contract.ImageAnnotationTypeModel:
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if model == nil {
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return nil, errorx.New(errno.ErrKnowledgeNonRetryableCode, errorx.KV("reason", "model is not provided"))
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}
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bytes, err := io.ReadAll(reader)
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if err != nil {
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return nil, err
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}
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b64 := base64.StdEncoding.EncodeToString(bytes)
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mime := fmt.Sprintf("image/%s", config.FileExtension)
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url := fmt.Sprintf("data:%s;base64,%s", mime, b64)
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input := &schema.Message{
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Role: schema.User,
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MultiContent: []schema.ChatMessagePart{
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{
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Type: schema.ChatMessagePartTypeText,
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//Text: "Give a short description of the image.", // TODO: prompt in current language
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Text: "简短描述下这张图片",
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},
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{
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Type: schema.ChatMessagePartTypeImageURL,
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ImageURL: &schema.ChatMessageImageURL{
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URL: url,
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MIMEType: mime,
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},
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},
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},
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}
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output, err := model.Generate(ctx, []*schema.Message{input})
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if err != nil {
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return nil, fmt.Errorf("[parseImage] model generate failed: %w", err)
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}
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doc.Content = output.Content
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case contract.ImageAnnotationTypeManual:
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// do nothing
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default:
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return nil, fmt.Errorf("[parseImage] unknown image annotation type=%d", config.ParsingStrategy.ImageAnnotationType)
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}
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return []*schema.Document{doc}, nil
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}
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}
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