flag.gno

 1package boards2
 2
 3import (
 4	"strconv"
 5
 6	"gno.land/p/gnoland/boards/v0"
 7	"gno.land/p/nt/bptree/v0"
 8)
 9
10// DefaultFlaggingThreshold defines the default number of flags that hides flaggable items.
11const DefaultFlaggingThreshold = 1
12
13var gFlaggingThresholds bptree.BPTree // string(board ID) -> int
14
15// flagItem adds a flag to a post.
16// Returns whether flag count threshold is reached and post can be hidden.
17// Panics if flag count threshold was already reached.
18func flagItem(post *boards.Post, user address, reason string, threshold int) bool {
19	if post.Flags.Size() >= threshold {
20		panic("flag count threshold exceeded: " + strconv.Itoa(threshold))
21	}
22
23	if post.Flags.Exists(user) {
24		panic("post has been already flagged by " + user.String())
25	}
26
27	post.Flags.Add(boards.Flag{
28		User:   user,
29		Reason: reason,
30	})
31
32	return post.Flags.Size() == threshold
33}
34
35func getFlaggingThreshold(bid boards.ID) int {
36	if v := gFlaggingThresholds.Get(bid.String()); v != nil {
37		return v.(int)
38	}
39	return DefaultFlaggingThreshold
40}