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keyphrases.go
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keyphrases.go
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package keyphrases
/**
*
*/
import (
"github.com/gelembjuk/keyphrases/helper"
"github.com/gelembjuk/keyphrases/languages"
"github.com/gelembjuk/keyphrases/phrases"
"github.com/gelembjuk/keyphrases/sentences"
"github.com/gelembjuk/keyphrases/words"
)
type TextPhrases struct {
text string
Language string
LanguageOptions map[string]string
NewsSource bool
langobj languages.LangClass
}
type Phrase phrases.Phrase
type PhrasesList phrases.PhrasesList
type InPhrase phrases.InPhrase
func (obj *TextPhrases) Init() error {
var err error
obj.langobj, err = languages.GetLangObject(obj.Language)
if err == nil {
if len(obj.LanguageOptions) > 0 {
obj.langobj.SetOptions(obj.LanguageOptions)
}
words.SetLangObject(obj.langobj)
sentences.SetLangObject(obj.langobj)
phrases.SetLangObject(obj.langobj)
}
return err
}
func (obj *TextPhrases) GetKeyPhrases(text string) PhrasesList {
obj.text = text
//phrases := []string{}
// 1. Split a text for sentences
// 2. Normalize sentences
var sentenceslist []string
if obj.NewsSource {
sentenceslist, _ = sentences.SplitTextForSentencesFromNews(text)
} else {
sentenceslist, _ = sentences.SplitTextForSentences(text)
}
// 3. Get words normalized
wordslist, _ := words.SplitSentencesForWords(sentenceslist)
// 4. Get phrases from sentences using words
phraseslisttmp, _ := phrases.GetPhrases(sentenceslist, wordslist)
phraseslist := PhrasesList{}
for _, i := range phraseslisttmp {
phraseslist = append(phraseslist, i)
}
return phraseslist
}
func (obj *TextPhrases) GetKeyWords(text string) []string {
obj.text = text
var sentenceslist []string
if obj.NewsSource {
sentenceslist, _ = sentences.SplitTextForSentencesFromNews(text)
} else {
sentenceslist, _ = sentences.SplitTextForSentences(text)
}
wordshash, _ := words.SplitSentencesForWords(sentenceslist)
words := helper.KeysSortedByValuesReverse(wordshash)
return words
}
// returns inclusion of predefined key phrases from the text
// predefined phrases is a hash array where each phrase has a list of sinonims
func (obj *TextPhrases) GetKeyPhrasesFromList(text string, inphrases []InPhrase) PhrasesList {
obj.text = text
var sentenceslist []string
if obj.NewsSource {
sentenceslist, _ = sentences.SplitTextForSentencesFromNews(text)
} else {
sentenceslist, _ = sentences.SplitTextForSentences(text)
}
// convert to internal list
inphrasesconv := []phrases.InPhrase{}
for _, ph := range inphrases {
phconv := phrases.InPhrase{ph.Phrase, ph.Synonims}
inphrasesconv = append(inphrasesconv, phconv)
}
phraseslisttmp, _ := phrases.GetPhrasesByPredefinedList(sentenceslist, inphrasesconv)
phraseslist := PhrasesList{}
for _, i := range phraseslisttmp {
phraseslist = append(phraseslist, i)
}
return phraseslist
}