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docextractor.go
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docextractor.go
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// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
// See LICENSE.txt for license information.
package docextractor
import (
"io"
)
// ExtractSettings defines the features enabled/disable during the document text extraction.
type ExtractSettings struct {
ArchiveRecursion bool
MMPreviewURL string
MMPreviewSecret string
}
// Extract extract the text from a document using the system default extractors
func Extract(filename string, r io.Reader, settings ExtractSettings) (string, error) {
return ExtractWithExtraExtractors(filename, r, settings, []Extractor{})
}
// ExtractWithExtraExtractors extract the text from a document using the provided extractors beside the system default extractors.
func ExtractWithExtraExtractors(filename string, r io.Reader, settings ExtractSettings, extraExtractors []Extractor) (string, error) {
enabledExtractors := &combineExtractor{}
for _, extraExtractor := range extraExtractors {
enabledExtractors.Add(extraExtractor)
}
enabledExtractors.Add(&pdfExtractor{})
enabledExtractors.Add(&documentExtractor{})
if settings.ArchiveRecursion {
enabledExtractors.Add(&archiveExtractor{SubExtractor: enabledExtractors})
} else {
enabledExtractors.Add(&archiveExtractor{})
}
if settings.MMPreviewURL != "" {
enabledExtractors.Add(newMMPreviewExtractor(settings.MMPreviewURL, settings.MMPreviewSecret, pdfExtractor{}))
}
enabledExtractors.Add(&plainExtractor{})
if enabledExtractors.Match(filename) {
return enabledExtractors.Extract(filename, r)
}
return "", nil
}