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pasty/internal/pastes/paste.go

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2020-08-22 23:27:37 +03:00
package pastes
import (
"github.com/alexedwards/argon2id"
"github.com/bwmarrin/snowflake"
)
func init() {
snowflakeNode, _ = snowflake.NewNode(1)
}
// snowflakeNode holds the current snowflake node
var snowflakeNode *snowflake.Node
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// Paste represents a saved paste
type Paste struct {
ID snowflake.ID `json:"id" bson:"_id"`
Content string `json:"content" bson:"content"`
SuggestedSyntaxType string `json:"suggestedSyntaxType" bson:"suggestedSyntaxType"`
DeletionToken string `json:"deletionToken" bson:"deletionToken"`
}
// Create creates a new paste object using the given content
func Create(content string) (*Paste, error) {
// TODO: Generate the suggested syntax type
suggestedSyntaxType := ""
// Generate the deletion token
deletionToken, err := generateDeletionToken()
if err != nil {
return nil, err
}
// Return the paste object
return &Paste{
ID: snowflakeNode.Generate(),
Content: content,
SuggestedSyntaxType: suggestedSyntaxType,
DeletionToken: deletionToken,
}, nil
}
// HashDeletionToken hashes the current deletion token of a paste
func (paste *Paste) HashDeletionToken() error {
hash, err := argon2id.CreateHash(paste.DeletionToken, argon2id.DefaultParams)
if err != nil {
return err
}
paste.DeletionToken = hash
return nil
}
// CheckDeletionToken checks whether or not the given deletion token is correct
func (paste *Paste) CheckDeletionToken(deletionToken string) bool {
match, err := argon2id.ComparePasswordAndHash(deletionToken, paste.DeletionToken)
return err != nil && match
}