82 lines
1.9 KiB
Go
82 lines
1.9 KiB
Go
package store
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import (
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"time"
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"github.com/pkg/errors"
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)
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// Service wraps store.Interface with additional methods
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type Service struct {
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Interface
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EditDuration time.Duration
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}
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// SetPin pin/un-pin comment as special
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func (s *Service) SetPin(locator Locator, commentID string, status bool) error {
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comment, err := s.Get(locator, commentID)
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if err != nil {
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return err
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}
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comment.Pin = status
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return s.Put(locator, comment)
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}
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// Vote for comment by id and locator
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func (s *Service) Vote(locator Locator, commentID string, userID string, val bool) (comment Comment, err error) {
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comment, err = s.Get(locator, commentID)
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if err != nil {
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return comment, err
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}
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v, voted := comment.Votes[userID]
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if voted && v == val {
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return comment, errors.Errorf("user %s already voted for %s", userID, commentID)
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}
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// reset vote if user changed to opposite
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if voted && v != val {
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delete(comment.Votes, userID)
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}
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// add to voted map if first vote
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if !voted {
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comment.Votes[userID] = val
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}
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// update score
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if val {
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comment.Score++
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} else {
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comment.Score--
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}
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return comment, s.Put(locator, comment)
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}
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// EditComment to edit text and update Edit info
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func (s *Service) EditComment(locator Locator, commentID string, text string, edit Edit) (comment Comment, err error) {
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comment, err = s.Get(locator, commentID)
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if err != nil {
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return comment, err
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}
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// edit allowed only once
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if comment.Edit != nil {
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return comment, errors.Errorf("comment %s already edited at %s", commentID, comment.Edit.Timestamp)
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}
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// edit allowed in editDuration window only
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if s.EditDuration > 0 && time.Now().After(comment.Timestamp.Add(s.EditDuration)) {
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return comment, errors.Errorf("too late to edit %s", commentID)
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}
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comment.Text = text
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comment.Edit = &edit
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comment.Edit.Timestamp = time.Now()
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comment = sanitizeComment(comment)
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err = s.Put(locator, comment)
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return comment, err
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}
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