49 lines
1.3 KiB
Go
49 lines
1.3 KiB
Go
package services
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import (
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"encoding/binary"
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"github.com/Damillora/Shioriko/pkg/database"
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"github.com/Damillora/Shioriko/pkg/models"
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"github.com/corona10/goimagehash"
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)
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func SimilaritySearch(originalHashInt uint64) ([]models.PostSimilarityListItem, error) {
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originalHash := goimagehash.NewImageHash(originalHashInt, goimagehash.PHash)
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hashSlice := make([]byte, 8)
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binary.LittleEndian.PutUint64(hashSlice, originalHashInt)
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var blobs []database.Blob
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database.DB.
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Joins("inner join posts on posts.blob_id = blobs.id").
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Where("hash1 = ?", hashSlice[0:2]).
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Or("hash2 = ?", hashSlice[2:4]).
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Or("hash3 = ?", hashSlice[4:6]).
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Or("hash4 = ?", hashSlice[6:8]).
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Find(&blobs)
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posts := make([]models.PostSimilarityListItem, 0)
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for _, blob := range blobs {
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hash2 := append(blob.Hash1, blob.Hash2...)
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hash3 := append(hash2, blob.Hash3...)
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hash4 := append(hash3, blob.Hash4...)
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hashInt := binary.LittleEndian.Uint64(hash4)
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compareHash := goimagehash.NewImageHash(hashInt, goimagehash.PHash)
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distance, _ := compareHash.Distance(originalHash)
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if distance < 1 {
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var post database.Post
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database.DB.Where("blob_id = ?", blob.ID).Find(&post)
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posts = append(posts, models.PostSimilarityListItem{
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ID: post.ID,
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Distance: distance,
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})
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}
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}
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return posts, nil
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}
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