Remove "before" field from Response

Listing responses only ever contain a non-empty "before" field when the
"count" parameter is provided, which is only useful for the HTML
website, not really needed for API clients

Signed-off-by: Vartan Benohanian <vartanbeno@gmail.com>

reddit/message.go

@@ -43,24 +43,18 @@ type inboxThing struct {
 type inboxListing struct {
 	inboxThings
 	after string
-	before string
 }
 
 func (l *inboxListing) After() string {
 	return l.after
 }
 
-func (l *inboxListing) Before() string {
-	return l.before
-}
-
 // UnmarshalJSON implements the json.Unmarshaler interface.
 func (l *inboxListing) UnmarshalJSON(b []byte) error {
 	root := new(struct {
 		Data struct {
 			Things inboxThings `json:"children"`
 			After  string      `json:"after"`
-			Before string      `json:"before"`
 		} `json:"data"`
 	})
 
@@ -71,7 +65,6 @@ func (l *inboxListing) UnmarshalJSON(b []byte) error {
 
 	l.inboxThings = root.Data.Things
 	l.after = root.Data.After
-	l.before = root.Data.Before
 
 	return nil
 }

reddit/post.go

@@ -109,8 +109,6 @@ func (s *PostService) Duplicates(ctx context.Context, id string, opts *ListDupli
 	duplicates := listing2.Posts()
 
 	resp.After = listing2.After()
-	resp.Before = listing2.Before()
-
 	return post, duplicates, resp, nil
 }
 

reddit/reddit.go

@@ -293,9 +293,6 @@ type Response struct {
 
 	// Pagination anchor indicating there are more results after this id.
 	After string
-	// Pagination anchor indicating there are more results before this id.
-	// todo: not sure yet if responses ever contain this
-	Before string
 
 	// Rate limit information.
 	Rate Rate
@@ -310,7 +307,6 @@ func newResponse(r *http.Response) *Response {
 
 func (r *Response) populateAnchors(a anchor) {
 	r.After = a.After()
-	r.Before = a.Before()
 }
 
 // parseRate parses the rate related headers.

reddit/subreddit.go

@@ -682,7 +682,6 @@ func (s *SubredditService) Banned(ctx context.Context, subreddit string, opts *L
 		Data struct {
 			Bans  []*Ban `json:"children"`
 			After string `json:"after"`
-			Before string `json:"before"`
 		} `json:"data"`
 	})
 	resp, err := s.client.Do(ctx, req, root)
@@ -691,8 +690,6 @@ func (s *SubredditService) Banned(ctx context.Context, subreddit string, opts *L
 	}
 
 	resp.After = root.Data.After
-	resp.Before = root.Data.Before
-
 	return root.Data.Bans, resp, nil
 }
 
@@ -714,7 +711,6 @@ func (s *SubredditService) Muted(ctx context.Context, subreddit string, opts *Li
 		Data struct {
 			Relationships []*Relationship `json:"children"`
 			After         string          `json:"after"`
-			Before        string          `json:"before"`
 		} `json:"data"`
 	})
 	resp, err := s.client.Do(ctx, req, root)
@@ -723,8 +719,6 @@ func (s *SubredditService) Muted(ctx context.Context, subreddit string, opts *Li
 	}
 
 	resp.After = root.Data.After
-	resp.Before = root.Data.Before
-
 	return root.Data.Relationships, resp, nil
 }
 
@@ -746,7 +740,6 @@ func (s *SubredditService) WikiBanned(ctx context.Context, subreddit string, opt
 		Data struct {
 			Bans  []*Ban `json:"children"`
 			After string `json:"after"`
-			Before string `json:"before"`
 		} `json:"data"`
 	})
 	resp, err := s.client.Do(ctx, req, root)
@@ -755,8 +748,6 @@ func (s *SubredditService) WikiBanned(ctx context.Context, subreddit string, opt
 	}
 
 	resp.After = root.Data.After
-	resp.Before = root.Data.Before
-
 	return root.Data.Bans, resp, nil
 }
 
@@ -778,7 +769,6 @@ func (s *SubredditService) Contributors(ctx context.Context, subreddit string, o
 		Data struct {
 			Relationships []*Relationship `json:"children"`
 			After         string          `json:"after"`
-			Before        string          `json:"before"`
 		} `json:"data"`
 	})
 	resp, err := s.client.Do(ctx, req, root)
@@ -787,8 +777,6 @@ func (s *SubredditService) Contributors(ctx context.Context, subreddit string, o
 	}
 
 	resp.After = root.Data.After
-	resp.Before = root.Data.Before
-
 	return root.Data.Relationships, resp, nil
 }
 
@@ -810,7 +798,6 @@ func (s *SubredditService) WikiContributors(ctx context.Context, subreddit strin
 		Data struct {
 			Relationships []*Relationship `json:"children"`
 			After         string          `json:"after"`
-			Before        string          `json:"before"`
 		} `json:"data"`
 	})
 	resp, err := s.client.Do(ctx, req, root)
@@ -819,8 +806,6 @@ func (s *SubredditService) WikiContributors(ctx context.Context, subreddit strin
 	}
 
 	resp.After = root.Data.After
-	resp.Before = root.Data.Before
-
 	return root.Data.Relationships, resp, nil
 }
 

reddit/things.go

@@ -31,7 +31,6 @@ const (
 
 type anchor interface {
 	After() string
-	Before() string
 }
 
 // thing is an entity on Reddit.
@@ -53,17 +52,6 @@ func (t *thing) After() string {
 	return a.After()
 }
 
-func (t *thing) Before() string {
-	if t == nil {
-		return ""
-	}
-	a, ok := t.Data.(anchor)
-	if !ok {
-		return ""
-	}
-	return a.Before()
-}
-
 // UnmarshalJSON implements the json.Unmarshaler interface.
 func (t *thing) UnmarshalJSON(b []byte) error {
 	root := new(struct {
@@ -239,27 +227,21 @@ func (t *thing) StyleSheet() (v *SubredditStyleSheet, ok bool) {
 }
 
 // listing is a list of things coming from the Reddit API.
-// It also contains the after/before anchors useful for subsequent requests.
+// It also contains the after anchor useful to get the next results via subsequent requests.
 type listing struct {
 	things things
 	after  string
-	before string
 }
 
 func (l *listing) After() string {
 	return l.after
 }
 
-func (l *listing) Before() string {
-	return l.before
-}
-
 // UnmarshalJSON implements the json.Unmarshaler interface.
 func (l *listing) UnmarshalJSON(b []byte) error {
 	root := new(struct {
 		Things things `json:"children"`
 		After  string `json:"after"`
-		Before string `json:"before"`
 	})
 
 	err := json.Unmarshal(b, root)
@@ -269,7 +251,6 @@ func (l *listing) UnmarshalJSON(b []byte) error {
 
 	l.things = root.Things
 	l.after = root.After
-	l.before = root.Before
 
 	return nil
 }

reddit/wiki.go

@@ -127,7 +127,6 @@ type wikiPageRevisionListing struct {
 	Data struct {
 		Revisions []*WikiPageRevision `json:"children"`
 		After     string              `json:"after"`
-		Before    string              `json:"before"`
 	} `json:"data"`
 }
 
@@ -135,10 +134,6 @@ func (l *wikiPageRevisionListing) After() string {
 	return l.Data.After
 }
 
-func (l *wikiPageRevisionListing) Before() string {
-	return l.Data.Before
-}
-
 // WikiPageRevision is a revision of a wiki page.
 type WikiPageRevision struct {
 	ID      string     `json:"id,omitempty"`
@@ -329,7 +324,7 @@ func (s *WikiService) revisions(ctx context.Context, subreddit, page string, opt
 	}
 
 	if opts != nil {
-		idPrefix := "WikiRevision_"
+		const idPrefix = "WikiRevision_"
 		if opts.After != "" && !strings.HasPrefix(opts.After, idPrefix) {
 			opts.After = idPrefix + opts.After
 		}