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package index
import "sync"
type Posting struct {
DocId int
Count int
}
type InvertedIndex struct {
Mu sync.RWMutex
Data map[string][]Posting
DocNames map[int]string
}
func New() *InvertedIndex {
return &InvertedIndex{
Data: make(map[string][]Posting),
DocNames: make(map[int]string),
}
}
func (idx *InvertedIndex) Add(docID int, title string, tokens []string) {
tokenCounts := make(map[string]int)
for _, token := range tokens {
tokenCounts[token]++
}
idx.Mu.Lock()
defer idx.Mu.Unlock()
idx.DocNames[docID] = title
for token, count := range tokenCounts {
idx.Data[token] = append(idx.Data[token], Posting{
DocId: docID,
Count: count,
})
}
}
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