gno.land/p/gnoland/boards/v0⧉

1package boards23import (4	"errors"5	"strings"6	"time"78	"gno.land/p/nt/ufmt/v0"9)1011// NewThread creates a new board thread.12func NewThread(b *Board, creator address, title, body string) (*Post, error) {13	if b == nil {14		return nil, errors.New("thread requires a parent board")15	}1617	if !creator.IsValid() {18		return nil, ufmt.Errorf("invalid thread creator address: %s", creator)19	}2021	title = strings.TrimSpace(title)22	if title == "" {23		return nil, errors.New("thread title is required")24	}2526	body = strings.TrimSpace(body)27	if body == "" {28		return nil, errors.New("thread body is required")29	}3031	id := b.ThreadsSequence.Next()32	return &Post{33		ID:        id,34		ThreadID:  id,35		Board:     b,36		Title:     title,37		Body:      body,38		Replies:   NewPostStorage(),39		Reposts:   NewRepostStorage(),40		Flags:     NewFlagStorage(),41		Creator:   creator,42		CreatedAt: time.Now(),43	}, nil44}4546// MustNewThread creates a new thread or panics on error.47func MustNewThread(b *Board, creator address, title, body string) *Post {48	t, err := NewThread(b, creator, title, body)49	if err != nil {50		panic(err)51	}52	return t53}5455// NewRepost creates a new thread that is a repost of a thread from another board.56func NewRepost(thread *Post, dst *Board, creator address) (*Post, error) {57	if thread == nil {58		return nil, errors.New("thread to repost is required")59	}6061	if thread.Board == nil {62		return nil, errors.New("original thread has no board assigned")63	}6465	if dst == nil {66		return nil, errors.New("thread repost requires a destination board")67	}6869	if IsRepost(thread) {70		return nil, errors.New("reposting a thread that is a repost is not allowed")71	}7273	if !IsThread(thread) {74		return nil, errors.New("post must be a thread to be reposted to another board")75	}7677	if !creator.IsValid() {78		return nil, ufmt.Errorf("invalid thread repost creator address: %s", creator)79	}8081	id := dst.ThreadsSequence.Next()82	return &Post{83		ID:              id,84		ThreadID:        id,85		ParentID:        thread.ID,86		OriginalBoardID: thread.Board.ID,87		Board:           dst,88		Replies:         NewPostStorage(),89		Reposts:         NewRepostStorage(),90		Flags:           NewFlagStorage(),91		Creator:         creator,92		CreatedAt:       time.Now(),93	}, nil94}9596// MustNewRepost creates a new thread that is a repost of a thread from another board or panics on error.97func MustNewRepost(thread *Post, dst *Board, creator address) *Post {98	r, err := NewRepost(thread, dst, creator)99	if err != nil {100		panic(err)101	}102	return r103}104