Add ModerationService, tweak structs, delete unneeded ones

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

moderation.go

@@ -0,0 +1,67 @@
+package reddit
+
+import (
+	"context"
+	"fmt"
+	"net/http"
+)
+
+// ModerationService handles communication with the moderation
+// related methods of the Reddit API.
+//
+// Reddit API docs: https://www.reddit.com/dev/api/#section_moderation
+type ModerationService service
+
+// ModAction is an action executed by a moderator of a subreddit, such
+// as inviting another user to be a mod, or setting permissions.
+type ModAction struct {
+	ID      string     `json:"id,omitempty"`
+	Action  string     `json:"action,omitempty"`
+	Created *Timestamp `json:"created_utc,omitempty"`
+
+	Moderator string `json:"mod,omitempty"`
+	// Not the full ID, just the ID36.
+	ModeratorID string `json:"mod_id36,omitempty"`
+
+	// The author of whatever the action was produced on, e.g. a user, post, comment, etc.
+	TargetAuthor string `json:"target_author,omitempty"`
+	// This is the full ID of whatever the target was.
+	TargetID        string `json:"target_fullname,omitempty"`
+	TargetTitle     string `json:"target_title,omitempty"`
+	TargetPermalink string `json:"target_permalink,omitempty"`
+	TargetBody      string `json:"target_body,omitempty"`
+
+	Subreddit string `json:"subreddit,omitempty"`
+	// Not the full ID, just the ID36.
+	SubredditID string `json:"sr_id36,omitempty"`
+}
+
+// GetActions gets a list of moderator actions on a subreddit.
+func (s *ModerationService) GetActions(ctx context.Context, subreddit string, opts ...SearchOptionSetter) (*ModActions, *Response, error) {
+	form := newSearchOptions(opts...)
+
+	path := fmt.Sprintf("r/%s/about/log", subreddit)
+	path = addQuery(path, form)
+
+	req, err := s.client.NewRequest(http.MethodGet, path, nil)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	root := new(rootListing)
+	resp, err := s.client.Do(ctx, req, root)
+	if err != nil {
+		return nil, resp, err
+	}
+
+	return root.getModeratorActions(), resp, nil
+}
+
+/*
+type rootTrophyListing struct {
+	Kind string `json:"kind,omitempty"`
+	Data struct {
+		Trophies []rootTrophy `json:"trophies"`
+	} `json:"data"`
+}
+*/