lemmy/ui/src/components/post-listing.tsx

import { Component, linkEvent } from 'inferno';
import { Link } from 'inferno-router';
import { WebSocketService, UserService } from '../services';
import { Post, CreatePostLikeForm, PostForm as PostFormI, SavePostForm, CommunityUser, UserView, BanType, BanFromCommunityForm, BanUserForm, AddModToCommunityForm, AddAdminForm, TransferSiteForm, TransferCommunityForm } from '../interfaces';
import { MomentTime } from './moment-time';
import { PostForm } from './post-form';
import { mdToHtml, canMod, isMod, isImage, isVideo, getUnixTime } from '../utils';
import { i18n } from '../i18next';
import { T } from 'inferno-i18next';

interface PostListingState {
  showEdit: boolean;
  showRemoveDialog: boolean;
  removeReason: string;
  showBanDialog: boolean;
  banReason: string;
  banExpires: string;
  banType: BanType;
  showConfirmTransferSite: boolean;
  showConfirmTransferCommunity: boolean;
  imageExpanded: boolean;
  viewSource: boolean;
}

interface PostListingProps {
  post: Post;
  editable?: boolean;
  showCommunity?: boolean;
  showBody?: boolean;
  viewOnly?: boolean;
  moderators?: Array<CommunityUser>;
  admins?: Array<UserView>;
}

export class PostListing extends Component<PostListingProps, PostListingState> {

  private emptyState: PostListingState = {
    showEdit: false,
    showRemoveDialog: false,
    removeReason: null,
    showBanDialog: false,
    banReason: null,
    banExpires: null,
    banType: BanType.Community,
    showConfirmTransferSite: false,
    showConfirmTransferCommunity: false,
    imageExpanded: false,
    viewSource: false,
  }

  constructor(props: any, context: any) {
    super(props, context);

    this.state = this.emptyState;
    this.handlePostLike = this.handlePostLike.bind(this);
    this.handlePostDisLike = this.handlePostDisLike.bind(this);
    this.handleEditPost = this.handleEditPost.bind(this);
    this.handleEditCancel = this.handleEditCancel.bind(this);
  }

  render() {
    return (
      <div class="row">
        {!this.state.showEdit 
          ? this.listing()
          : 
          <div class="col-12">
            <PostForm post={this.props.post} onEdit={this.handleEditPost} onCancel={this.handleEditCancel}/>
          </div>
        }
      </div>
    )
  }

  listing() {
    let post = this.props.post;
    return (
      <div class="listing col-12">
        <div className={`vote-bar mr-2 float-left small text-center ${this.props.viewOnly && 'no-click'}`}>
          <button className={`btn p-0 ${post.my_vote == 1 ? 'text-info' : 'text-muted'}`} onClick={linkEvent(this, this.handlePostLike)}>
            <svg class="icon upvote"><use xlinkHref="#icon-arrow-up"></use></svg>
          </button>
          <div class={`font-weight-bold text-muted`}>{post.score}</div>
          <button className={`btn p-0 ${post.my_vote == -1 ? 'text-danger' : 'text-muted'}`} onClick={linkEvent(this, this.handlePostDisLike)}>
            <svg class="icon downvote"><use xlinkHref="#icon-arrow-down"></use></svg>
          </button>
        </div>
        {post.url && isImage(post.url) &&
          <span title={i18n.t('expand_here')} class="pointer" onClick={linkEvent(this, this.handleImageExpandClick)}><img class="mx-2 mt-1 float-left img-fluid thumbnail rounded" src={post.url} /></span>
        }
        {post.url && isVideo(post.url) &&
          <video controls autoPlay muted loop class="mx-2 mt-1 float-left img-fluid thumbnail rounded">
            <source src={post.url} type="video/mp4" />
          </video>
        }
        <div className="ml-4">
          <div className="post-title">
            <h5 className="mb-0 d-inline">
              {post.url ? 
              <a className="text-white" href={post.url} target="_blank" title={post.url}>{post.name}</a> : 
              <Link className="text-white" to={`/post/${post.id}`} title={i18n.t('comments')}>{post.name}</Link>
              }
            </h5>
            {post.url && 
              <small>
                <a className="ml-2 text-muted font-italic" href={post.url} target="_blank" title={post.url}>{(new URL(post.url)).hostname}</a>
              </small>
            }
            { post.url && isImage(post.url) && 
              <>
                { !this.state.imageExpanded
                  ? <span class="text-monospace pointer ml-2 text-muted small" title={i18n.t('expand_here')} onClick={linkEvent(this, this.handleImageExpandClick)}>[+]</span>
                  : 
                  <span>
                    <span class="text-monospace pointer ml-2 text-muted small" onClick={linkEvent(this, this.handleImageExpandClick)}>[-]</span>
                    <div>
                      <span class="pointer" onClick={linkEvent(this, this.handleImageExpandClick)}><img class="img-fluid" src={post.url} /></span>
                    </div>
                  </span>
                }
              </>
            }
            {post.removed &&
              <small className="ml-2 text-muted font-italic"><T i18nKey="removed">#</T></small>
            }
            {post.deleted &&
              <small className="ml-2 text-muted font-italic"><T i18nKey="deleted">#</T></small>
            }
            {post.locked &&
              <small className="ml-2 text-muted font-italic"><T i18nKey="locked">#</T></small>
            }
            {post.stickied &&
              <small className="ml-2 text-muted font-italic"><T i18nKey="stickied">#</T></small>
            }
            {post.nsfw &&
              <small className="ml-2 text-muted font-italic"><T i18nKey="nsfw">#</T></small>
            }
          </div>
        </div>
        <div className="details ml-4">
          <ul class="list-inline mb-0 text-muted small">
            <li className="list-inline-item">
              <span>{i18n.t('by')} </span>
              <Link className="text-info" to={`/u/${post.creator_name}`}>{post.creator_name}</Link>
              {this.isMod && 
                <span className="mx-1 badge badge-light"><T i18nKey="mod">#</T></span>
              }
              {this.isAdmin && 
                <span className="mx-1 badge badge-light"><T i18nKey="admin">#</T></span>
              }
              {(post.banned_from_community || post.banned) &&  
                <span className="mx-1 badge badge-danger"><T i18nKey="banned">#</T></span>
              }
              {this.props.showCommunity && 
                <span>
                  <span> {i18n.t('to')} </span>
                  <Link to={`/c/${post.community_name}`}>{post.community_name}</Link>
                </span>
              }
            </li>
            <li className="list-inline-item">
              <span><MomentTime data={post} /></span>
            </li>
            <li className="list-inline-item">
              <span>(
                <span className="text-info">+{post.upvotes}</span>
                <span> | </span>
                <span className="text-danger">-{post.downvotes}</span>
                <span>) </span>
              </span>
            </li>
            <li className="list-inline-item">
              <Link className="text-muted" to={`/post/${post.id}`}><T i18nKey="number_of_comments" interpolation={{count: post.number_of_comments}}>#</T></Link>
            </li>
          </ul>
          <ul class="list-inline mb-1 text-muted small font-weight-bold"> 
            {UserService.Instance.user && this.props.editable &&
              <>
                <li className="list-inline-item mr-2">
                  <span class="pointer" onClick={linkEvent(this, this.handleSavePostClick)}>{post.saved ? i18n.t('unsave') : i18n.t('save')}</span>
                </li>
                <li className="list-inline-item mr-2">
                  <Link className="text-muted" to={`/create_post${this.crossPostParams}`}><T i18nKey="cross_post">#</T></Link>
                </li>
                {this.myPost && 
                  <>
                    <li className="list-inline-item">
                      <span class="pointer" onClick={linkEvent(this, this.handleEditClick)}><T i18nKey="edit">#</T></span>
                    </li>
                    <li className="list-inline-item mr-2">
                      <span class="pointer" onClick={linkEvent(this, this.handleDeleteClick)}>
                        {!post.deleted ? i18n.t('delete') : i18n.t('restore')}
                      </span>
                    </li>
                  </>
                }
                {this.canModOnSelf &&
                  <>
                    <li className="list-inline-item">
                      <span class="pointer" onClick={linkEvent(this, this.handleModLock)}>{post.locked ? i18n.t('unlock') : i18n.t('lock')}</span>
                    </li>
                    <li className="list-inline-item">
                      <span class="pointer" onClick={linkEvent(this, this.handleModSticky)}>{post.stickied ? i18n.t('unsticky') : i18n.t('sticky')}</span>
                    </li>
                  </>
                }
                {/* Mods can ban from community, and appoint as mods to community */}
                {this.canMod &&
                  <>
                    <li className="list-inline-item">
                      {!post.removed ? 
                      <span class="pointer" onClick={linkEvent(this, this.handleModRemoveShow)}><T i18nKey="remove">#</T></span> :
                      <span class="pointer" onClick={linkEvent(this, this.handleModRemoveSubmit)}><T i18nKey="restore">#</T></span>
                      }
                    </li>
                    {!this.isMod && 
                      <li className="list-inline-item">
                        {!post.banned_from_community ? 
                        <span class="pointer" onClick={linkEvent(this, this.handleModBanFromCommunityShow)}><T i18nKey="ban">#</T></span> :
                        <span class="pointer" onClick={linkEvent(this, this.handleModBanFromCommunitySubmit)}><T i18nKey="unban">#</T></span>
                        }
                      </li>
                    }
                    {!post.banned_from_community &&
                      <li className="list-inline-item">
                        <span class="pointer" onClick={linkEvent(this, this.handleAddModToCommunity)}>{this.isMod ? i18n.t('remove_as_mod') : i18n.t('appoint_as_mod')}</span>
                      </li>
                    }
                  </>
                }
                {/* Community creators and admins can transfer community to another mod */}
                {(this.amCommunityCreator || this.canAdmin) && this.isMod &&
                  <li className="list-inline-item">
                    {!this.state.showConfirmTransferCommunity ?
                    <span class="pointer" onClick={linkEvent(this, this.handleShowConfirmTransferCommunity)}><T i18nKey="transfer_community">#</T>
                  </span> : <>
                    <span class="d-inline-block mr-1"><T i18nKey="are_you_sure">#</T></span>
                    <span class="pointer d-inline-block mr-1" onClick={linkEvent(this, this.handleTransferCommunity)}><T i18nKey="yes">#</T></span>
                    <span class="pointer d-inline-block" onClick={linkEvent(this, this.handleCancelShowConfirmTransferCommunity)}><T i18nKey="no">#</T></span>
                  </>
                    }
                  </li>
                }
                {/* Admins can ban from all, and appoint other admins */}
                {this.canAdmin &&
                  <>
                    {!this.isAdmin && 
                      <li className="list-inline-item">
                        {!post.banned ? 
                        <span class="pointer" onClick={linkEvent(this, this.handleModBanShow)}><T i18nKey="ban_from_site">#</T></span> :
                        <span class="pointer" onClick={linkEvent(this, this.handleModBanSubmit)}><T i18nKey="unban_from_site">#</T></span>
                        }
                      </li>
                    }
                    {!post.banned &&
                      <li className="list-inline-item">
                        <span class="pointer" onClick={linkEvent(this, this.handleAddAdmin)}>{this.isAdmin ? i18n.t('remove_as_admin') : i18n.t('appoint_as_admin')}</span>
                      </li>
                    }
                  </>
                }
                {/* Site Creator can transfer to another admin */}
                {this.amSiteCreator && this.isAdmin &&
                  <li className="list-inline-item">
                    {!this.state.showConfirmTransferSite ?
                    <span class="pointer" onClick={linkEvent(this, this.handleShowConfirmTransferSite)}><T i18nKey="transfer_site">#</T>
                  </span> : <>
                    <span class="d-inline-block mr-1"><T i18nKey="are_you_sure">#</T></span>
                    <span class="pointer d-inline-block mr-1" onClick={linkEvent(this, this.handleTransferSite)}><T i18nKey="yes">#</T></span>
                    <span class="pointer d-inline-block" onClick={linkEvent(this, this.handleCancelShowConfirmTransferSite)}><T i18nKey="no">#</T></span>
                  </>
                    }
                  </li>
                }
              </>
            }
            {this.props.showBody && post.body && 
              <li className="list-inline-item">
                <span className="pointer" onClick={linkEvent(this, this.handleViewSource)}><T i18nKey="view_source">#</T></span>
              </li>
            }
          </ul>
          {this.state.showRemoveDialog && 
            <form class="form-inline" onSubmit={linkEvent(this, this.handleModRemoveSubmit)}>
              <input type="text" class="form-control mr-2" placeholder={i18n.t('reason')} value={this.state.removeReason} onInput={linkEvent(this, this.handleModRemoveReasonChange)} />
              <button type="submit" class="btn btn-secondary"><T i18nKey="remove_post">#</T></button>
            </form>
          }
          {this.state.showBanDialog && 
            <form onSubmit={linkEvent(this, this.handleModBanBothSubmit)}>
              <div class="form-group row">
                <label class="col-form-label"><T i18nKey="reason">#</T></label>
                <input type="text" class="form-control mr-2" placeholder={i18n.t('reason')} value={this.state.banReason} onInput={linkEvent(this, this.handleModBanReasonChange)} />
              </div>
              {/* TODO hold off on expires until later */}
              {/* <div class="form-group row"> */}
                {/*   <label class="col-form-label">Expires</label> */}
                {/*   <input type="date" class="form-control mr-2" placeholder={i18n.t('expires')} value={this.state.banExpires} onInput={linkEvent(this, this.handleModBanExpiresChange)} /> */}
                {/* </div> */}
                <div class="form-group row">
                  <button type="submit" class="btn btn-secondary">{i18n.t('ban')} {post.creator_name}</button>
                </div>
              </form>
          }
            {this.props.showBody && post.body &&
              <>
                {this.state.viewSource ? <div>{post.body}</div> : 
                <div className="md-div" dangerouslySetInnerHTML={mdToHtml(post.body)} />
                }
              </>
            }
        </div>
      </div>
    )
  }

  private get myPost(): boolean {
    return UserService.Instance.user && this.props.post.creator_id == UserService.Instance.user.id;
  }

  get isMod(): boolean {
    return this.props.moderators && isMod(this.props.moderators.map(m => m.user_id), this.props.post.creator_id);
  }

  get isAdmin(): boolean {
    return this.props.admins && isMod(this.props.admins.map(a => a.id), this.props.post.creator_id);
  }

  get adminsThenMods(): Array<number> {
    return this.props.admins.map(a => a.id)
    .concat(this.props.moderators.map(m => m.user_id));
  }

  get canMod(): boolean {

    if (this.props.editable) {
      return canMod(UserService.Instance.user, this.adminsThenMods, this.props.post.creator_id);
    } else return false;
  }

  get canModOnSelf(): boolean {

    if (this.props.editable) {
      return canMod(UserService.Instance.user, this.adminsThenMods, this.props.post.creator_id, true);
    } else return false;
  }

  get canAdmin(): boolean {
    return this.props.admins && canMod(UserService.Instance.user, this.props.admins.map(a => a.id), this.props.post.creator_id);
  }

  get amCommunityCreator(): boolean {
    return this.props.moderators && 
      UserService.Instance.user && 
      (this.props.post.creator_id != UserService.Instance.user.id) &&
      (UserService.Instance.user.id == this.props.moderators[0].user_id);
  }

  get amSiteCreator(): boolean {
    return this.props.admins && 
      UserService.Instance.user && 
      (this.props.post.creator_id != UserService.Instance.user.id) &&
      (UserService.Instance.user.id == this.props.admins[0].id);
  }

  handlePostLike(i: PostListing) {

    let form: CreatePostLikeForm = {
      post_id: i.props.post.id,
      score: (i.props.post.my_vote == 1) ? 0 : 1
    };
    WebSocketService.Instance.likePost(form);
  }

  handlePostDisLike(i: PostListing) {
    let form: CreatePostLikeForm = {
      post_id: i.props.post.id,
      score: (i.props.post.my_vote == -1) ? 0 : -1
    };
    WebSocketService.Instance.likePost(form);
  }

  handleEditClick(i: PostListing) {
    i.state.showEdit = true;
    i.setState(i.state);
  }

  handleEditCancel() {
    this.state.showEdit = false;
    this.setState(this.state);
  }

  // The actual editing is done in the recieve for post
  handleEditPost() {
    this.state.showEdit = false;
    this.setState(this.state);
  }

  handleDeleteClick(i: PostListing) {
    let deleteForm: PostFormI = {
      body: i.props.post.body,
      community_id: i.props.post.community_id,
      name: i.props.post.name,
      url: i.props.post.url,
      edit_id: i.props.post.id,
      creator_id: i.props.post.creator_id,
      deleted: !i.props.post.deleted,
      nsfw: i.props.post.nsfw,
      auth: null
    };
    WebSocketService.Instance.editPost(deleteForm);
  }

  handleSavePostClick(i: PostListing) {
    let saved = (i.props.post.saved == undefined) ? true : !i.props.post.saved;
    let form: SavePostForm = {
      post_id: i.props.post.id,
      save: saved
    };

    WebSocketService.Instance.savePost(form);
  }

  get crossPostParams(): string {
    let params = `?name=${this.props.post.name}`;
    if (this.props.post.url) {
      params += `&url=${this.props.post.url}`;
    }
    if (this.props.post.body) {
      params += `&body=${this.props.post.body}`;
    }
    return params;
  }

  handleModRemoveShow(i: PostListing) {
    i.state.showRemoveDialog = true;
    i.setState(i.state);
  }

  handleModRemoveReasonChange(i: PostListing, event: any) {
    i.state.removeReason = event.target.value;
    i.setState(i.state);
  }

  handleModRemoveSubmit(i: PostListing) {
    event.preventDefault();
    let form: PostFormI = {
      name: i.props.post.name,
      community_id: i.props.post.community_id,
      edit_id: i.props.post.id,
      creator_id: i.props.post.creator_id,
      removed: !i.props.post.removed,
      reason: i.state.removeReason,
      nsfw: i.props.post.nsfw,
      auth: null,
    };
    WebSocketService.Instance.editPost(form);

    i.state.showRemoveDialog = false;
    i.setState(i.state);
  }

  handleModLock(i: PostListing) {
    let form: PostFormI = {
      name: i.props.post.name,
      community_id: i.props.post.community_id,
      edit_id: i.props.post.id,
      creator_id: i.props.post.creator_id,
      nsfw: i.props.post.nsfw,
      locked: !i.props.post.locked,
      auth: null,
    };
    WebSocketService.Instance.editPost(form);
  }

  handleModSticky(i: PostListing) {
    let form: PostFormI = {
      name: i.props.post.name,
      community_id: i.props.post.community_id,
      edit_id: i.props.post.id,
      creator_id: i.props.post.creator_id,
      nsfw: i.props.post.nsfw,
      stickied: !i.props.post.stickied,
      auth: null,
    };
    WebSocketService.Instance.editPost(form);
  }

  handleModBanFromCommunityShow(i: PostListing) {
    i.state.showBanDialog = true;
    i.state.banType = BanType.Community;
    i.setState(i.state);
  }

  handleModBanShow(i: PostListing) {
    i.state.showBanDialog = true;
    i.state.banType = BanType.Site;
    i.setState(i.state);
  }

  handleModBanReasonChange(i: PostListing, event: any) {
    i.state.banReason = event.target.value;
    i.setState(i.state);
  }

  handleModBanExpiresChange(i: PostListing, event: any) {
    i.state.banExpires = event.target.value;
    i.setState(i.state);
  }

  handleModBanFromCommunitySubmit(i: PostListing) {
    i.state.banType = BanType.Community;
    i.setState(i.state);
    i.handleModBanBothSubmit(i);
  }

  handleModBanSubmit(i: PostListing) {
    i.state.banType = BanType.Site;
    i.setState(i.state);
    i.handleModBanBothSubmit(i);
  }

  handleModBanBothSubmit(i: PostListing) {
    event.preventDefault();

    if (i.state.banType == BanType.Community) {
      let form: BanFromCommunityForm = {
        user_id: i.props.post.creator_id,
        community_id: i.props.post.community_id,
        ban: !i.props.post.banned_from_community,
        reason: i.state.banReason,
        expires: getUnixTime(i.state.banExpires),
      };
      WebSocketService.Instance.banFromCommunity(form);
    } else {
      let form: BanUserForm = {
        user_id: i.props.post.creator_id,
        ban: !i.props.post.banned,
        reason: i.state.banReason,
        expires: getUnixTime(i.state.banExpires),
      };
      WebSocketService.Instance.banUser(form);
    }

    i.state.showBanDialog = false;
    i.setState(i.state);
  }

  handleAddModToCommunity(i: PostListing) {
    let form: AddModToCommunityForm = {
      user_id: i.props.post.creator_id,
      community_id: i.props.post.community_id,
      added: !i.isMod,
    };
    WebSocketService.Instance.addModToCommunity(form);
    i.setState(i.state);
  }

  handleAddAdmin(i: PostListing) {
    let form: AddAdminForm = {
      user_id: i.props.post.creator_id,
      added: !i.isAdmin,
    };
    WebSocketService.Instance.addAdmin(form);
    i.setState(i.state);
  }

  handleShowConfirmTransferCommunity(i: PostListing) { 
    i.state.showConfirmTransferCommunity = true;
    i.setState(i.state);
  }

  handleCancelShowConfirmTransferCommunity(i: PostListing) { 
    i.state.showConfirmTransferCommunity = false;
    i.setState(i.state);
  }

  handleTransferCommunity(i: PostListing) {
    let form: TransferCommunityForm = {
      community_id: i.props.post.community_id,
      user_id: i.props.post.creator_id,
    };
    WebSocketService.Instance.transferCommunity(form);
    i.state.showConfirmTransferCommunity = false;
    i.setState(i.state);
  }

  handleShowConfirmTransferSite(i: PostListing) { 
    i.state.showConfirmTransferSite = true;
    i.setState(i.state);
  }

  handleCancelShowConfirmTransferSite(i: PostListing) { 
    i.state.showConfirmTransferSite = false;
    i.setState(i.state);
  }

  handleTransferSite(i: PostListing) {
    let form: TransferSiteForm = {
      user_id: i.props.post.creator_id,
    };
    WebSocketService.Instance.transferSite(form);
    i.state.showConfirmTransferSite = false;
    i.setState(i.state);
  }

  handleImageExpandClick(i: PostListing) {
    i.state.imageExpanded = !i.state.imageExpanded;
    i.setState(i.state);
  }

  handleViewSource(i: PostListing) {
    i.state.viewSource = !i.state.viewSource;
    i.setState(i.state);
  }
}