import type {  EnvironmentId,  PullRequestActor,  PullRequestComment,  PullRequestDetailView,  PullRequestRef,} from "@t3tools/contracts";import {  ArrowDownUpIcon,  ChevronDownIcon,  ChevronRightIcon,  HammerIcon,  MessageSquareIcon,  PencilIcon,  SendIcon,  TagIcon,  UsersIcon,} from "lucide-react";import { useRef, useState, type ReactNode } from "react"; import { useAtomCommand } from "~/state/use-atom-command";import { pullRequestEnvironment } from "~/state/pullRequests";import { cn } from "~/lib/utils";import { readLocalApi } from "~/localApi";import { formatRelativeTimeLabel } from "~/timestampFormat"; import { Button } from "../ui/button";import { Collapsible, CollapsiblePanel, CollapsibleTrigger } from "../ui/collapsible";import { Textarea } from "../ui/textarea";import { toastManager } from "../ui/toast";import { Tooltip, TooltipPopup, TooltipTrigger } from "../ui/tooltip";import {  PullRequestActorAvatar,  PullRequestActorLabel,  PullRequestCheckStatusIcon,  pullRequestCheckStatusLabel,} from "./pullRequestPresentation";import { PullRequestReviewerPicker } from "./PullRequestReviewerPicker";import { PullRequestActivityUnavailableState } from "./PullRequestActivityUnavailableState";import {  orderPullRequestComments,  pullRequestFindingKey,  type PullRequestFinding,} from "./pullRequestDetail.logic";import {  canEditPullRequestChangeRequest,  canEditPullRequestComment,} from "./pullRequestEditing.logic";import { PullRequestMarkdown } from "./PullRequestMarkdown";import { PullRequestMarkdownEditor } from "./PullRequestMarkdownEditor";import { PullRequestReactionBar } from "./PullRequestReactions";import { PullRequestConversationGhost } from "./PullRequestGhosts";import { sectionCollapseAnchorScrollTop } from "./pullRequestSummaryScroll.logic"; /** A host colour only when it is one, so a malformed value falls back to the neutral dot. */function labelDotColor(color: string | null): string | null {  const hex = color?.trim().replace(/^#/, "") ?? "";  return /^[0-9a-fA-F]{6}$/.test(hex) ? `#${hex}` : null;} /** The avatar carries the attribution alone; who it is arrives on hover, like the reviewer row. */function CommentAuthor({ actor }: { actor: PullRequestActor | null }) {  const login = actor?.login ?? "ghost";  return (    <Tooltip>      <TooltipTrigger render={<span className="shrink-0 rounded-full" aria-label={login} />}>        <PullRequestActorAvatar actor={actor} />      </TooltipTrigger>      <TooltipPopup side="bottom">        {actor?.name && actor.name !== login ? `${actor.name} (@${login})` : login}      </TooltipPopup>    </Tooltip>  );} /** "CHANGES_REQUESTED" reads as "Changes requested": one capital, the host's underscores gone. */function reviewStateLabel(state: string): string {  const words = state.toLowerCase().replace(/_/g, " ");  return words.charAt(0).toUpperCase() + words.slice(1);} /** What every remark in the conversation needs to be rewritten where it sits. */interface CommentEditing {  readonly cwd: string;  readonly canEdit: (comment: PullRequestComment) => boolean;  readonly editingId: string | null;  readonly saving: boolean;  readonly onEdit: (comment: PullRequestComment | null) => void;  readonly onSave: (comment: PullRequestComment, body: string) => void;} /** * A remark's words, and the pencil that swaps them for the editor. The pencil is revealed by * hovering the remark, like the reaction bar's own, so the parent must carry `group`. */function CommentBody({  comment,  editing,  className,}: {  comment: PullRequestComment;  editing: CommentEditing;  className?: string | undefined;}) {  if (editing.editingId === comment.id) {    return (      <PullRequestMarkdownEditor        className={className}        value={comment.body}        cwd={editing.cwd}        label="Edit comment"        saving={editing.saving}        onSave={(body) => editing.onSave(comment, body)}        onCancel={() => editing.onEdit(null)}      />    );  }  return (    <div className={cn("flex items-start gap-1", className)}>      <PullRequestMarkdown className="min-w-0 flex-1" text={comment.body} cwd={editing.cwd} />      {editing.canEdit(comment) ? (        <Button          size="icon-xs"          variant="ghost"          className="shrink-0 text-muted-foreground opacity-0 transition-opacity group-focus-within:opacity-100 group-hover:opacity-100 focus-visible:opacity-100"          aria-label="Edit comment"          onClick={() => editing.onEdit(comment)}        >          <PencilIcon className="size-3" />        </Button>      ) : null}    </div>  );} /** Finished work — a resolved conversation or a dismissed approval — opens collapsed. */function CollapsedComment({  comment,  editing,  label,  reactionBar,}: {  comment: PullRequestComment;  editing: CommentEditing;  label: string;  reactionBar: ReactNode;}) {  const [open, setOpen] = useState(false);  return (    <Collapsible open={open} onOpenChange={setOpen}>      <article className="group rounded-lg border border-border/60 [contain-intrinsic-block-size:44px] [content-visibility:auto]">        <CollapsibleTrigger          className={cn(            "flex w-full items-center gap-2 p-3 text-left transition-opacity hover:opacity-100",            open ? "opacity-100" : "opacity-65",          )}        >          <span className="flex min-w-0 flex-1 items-center gap-2 text-xs text-muted-foreground">            <CommentAuthor actor={comment.author} />            <span>{formatRelativeTimeLabel(comment.createdAt)}</span>            <span>{label}</span>          </span>          <ChevronDownIcon            aria-hidden            className={cn(              "size-3.5 shrink-0 text-muted-foreground transition-transform",              open && "rotate-180",            )}          />        </CollapsibleTrigger>        <CollapsiblePanel>          {open ? (            <div className="px-3 pb-3">              {comment.path ? (                <p className="truncate text-xs text-muted-foreground" title={comment.path}>                  {comment.path}                </p>              ) : null}              <CommentBody className="mt-2" comment={comment} editing={editing} />              {reactionBar}            </div>          ) : null}        </CollapsiblePanel>      </article>    </Collapsible>  );} function MetaRow({  icon,  label,  children,}: {  icon: ReactNode;  label: string;  children: ReactNode;}) {  return (    <div className="flex items-center gap-2 py-1.5 text-xs">      <span className="flex w-24 shrink-0 items-center gap-1.5 text-muted-foreground">        {icon}        {label}      </span>      <span className="min-w-0 flex-1 text-foreground">{children}</span>    </div>  );} function Section({  title,  count,  defaultOpen = true,  actions,  children,}: {  title: string;  count?: number;  defaultOpen?: boolean;  /** Controls riding on the heading row itself. A sibling of the trigger, not a child of it —      a button cannot hold a button — and only while open, since they act on what is shown. */  actions?: ReactNode;  children: ReactNode;}) {  const [open, setOpen] = useState(defaultOpen);  const headingRef = useRef<HTMLDivElement>(null);  const setOpenWithScrollAnchor = (nextOpen: boolean) => {    if (!nextOpen) {      const heading = headingRef.current;      const section = heading?.closest<HTMLElement>("[data-pull-request-summary-section]");      const scroller = heading?.closest<HTMLElement>("[data-pull-request-summary-scroll]");      if (heading && section && scroller) {        const target = sectionCollapseAnchorScrollTop({          scrollTop: scroller.scrollTop,          viewportTop: scroller.getBoundingClientRect().top,          sectionTop: section.getBoundingClientRect().top,          headingTop: heading.getBoundingClientRect().top,        });        // Synchronous with the press: React commits the collapsed height before the browser        // paints, so the reader sees the heading they pressed stay put rather than a jump first.        if (target !== null) scroller.scrollTop = target;      }    }    setOpen(nextOpen);  };  return (    <Collapsible      open={open}      onOpenChange={setOpenWithScrollAnchor}      data-pull-request-summary-section    >      {/* The heading rides the top of the scroll box the way a diff's file header does, so a          section can be collapsed from wherever its body has been read to rather than only from          where it started. Opaque, because the rows it covers scroll beneath it. */}      <div        ref={headingRef}        className="sticky top-0 z-10 flex w-full items-center border-t border-border/60 bg-background pr-4"      >        {/* Title first, chevron riding to its right, count last: the row reads as a heading            with an affordance rather than a tree node. */}        <CollapsibleTrigger className="flex min-w-0 flex-1 items-center gap-1.5 px-4 py-3 text-left text-sm font-medium">          <span>{title}</span>          <ChevronRightIcon            aria-hidden            className={cn(              "size-3.5 text-muted-foreground transition-transform",              open && "rotate-90",            )}          />          {count === undefined ? null : (            <span className="text-xs tabular-nums text-muted-foreground">{count}</span>          )}        </CollapsibleTrigger>        {open ? actions : null}      </div>      <CollapsiblePanel>        <div className="px-4 pb-4">{children}</div>      </CollapsiblePanel>    </Collapsible>  );} function CommentComposer({  environmentId,  detail,  onCommented,}: {  environmentId: EnvironmentId;  detail: PullRequestDetailView;  onCommented: () => void;}) {  const [body, setBody] = useState("");  const [posting, setPosting] = useState(false);  const postComment = useAtomCommand(pullRequestEnvironment.comment, { reportFailure: false });   const submit = async () => {    const trimmed = body.trim();    if (trimmed.length === 0 || posting) return;    setPosting(true);    const result = await postComment({      environmentId,      input: {        projectId: detail.projectId,        repository: detail.repository,        number: detail.number,        body: trimmed,      },    });    setPosting(false);    if (result._tag === "Failure") {      toastManager.add({ type: "error", title: "Could not post the comment" });      return;    }    setBody("");    onCommented();  };   return (    <div className="mt-3 space-y-2">      <Textarea        // Locked while posting: the body is cleared on success, which would otherwise throw        // away a new draft typed while the request was still in flight.        disabled={posting}        value={body}        rows={3}        placeholder="Leave a comment"        aria-label="Comment on this pull request"        onChange={(event) => setBody(event.target.value)}      />      <div className="flex justify-end">        <Button          size="xs"          variant="outline"          disabled={body.trim().length === 0 || posting}          onClick={() => void submit()}        >          <SendIcon className="size-3.5" />          {posting ? "Posting..." : "Comment"}        </Button>      </div>    </div>  );} /** * What a first render of the conversation carries. A pull request with two hundred comments is * two hundred markdown documents, and the ones worth arriving for are the recent ones. */const COMMENT_PAGE = 30; export function PullRequestSummaryTab({  environmentId,  reference,  detail,  activityPending,  activityError,  pendingFinding,  fixFindingLabel = "Fix in a thread",  fixCheckLabel = "Fix",  onFixFinding,  onRefresh,}: {  environmentId: EnvironmentId;  reference: PullRequestRef;  detail: PullRequestDetailView;  activityPending: boolean;  activityError: string | null;  /** The hand-off currently preparing, if any, so only the finding it belongs to says so. */  pendingFinding?: string | null;  fixFindingLabel?: string;  fixCheckLabel?: string;  onFixFinding?: (finding: PullRequestFinding) => void;  onRefresh: () => void;}) {  // Keyed by the pull request, so opening another one starts at the end of its conversation  // rather than wherever the last one had been read back to.  const [shown, setShown] = useState({ url: detail.url, count: COMMENT_PAGE });  const shownComments = shown.url === detail.url ? shown.count : COMMENT_PAGE;  // Windowed by recency regardless of display order: expanding always reaches further back in  // time, whether the newest comment currently reads first or last.  const recentComments = detail.comments.slice(Math.max(0, detail.comments.length - shownComments));  const hiddenCommentCount = detail.comments.length - recentComments.length;  const [commentOrder, setCommentOrder] = useState<"newest" | "oldest">("newest");  const visibleComments = orderPullRequestComments(recentComments, commentOrder);   // A comment that already lives on a review thread is that thread: the thread carries the line  // and side the bare comment has lost, and a resolved one is finished work nobody should be  // invited to fix again — the same call the whole-review hand-off makes.  const threadByCommentId = new Map(    detail.reviewThreads.flatMap((thread) =>      thread.comments.map((comment) => [comment.id, thread] as const),    ),  );   const openCheck = (url: string) => {    void readLocalApi()?.shell.openExternal(url);  };   const update = useAtomCommand(pullRequestEnvironment.update, { reportFailure: false });  const updateComment = useAtomCommand(pullRequestEnvironment.updateComment, {    reportFailure: false,  });  // Keyed by the pull request, like the comment window above it, so an editor left open never  // reappears over the next pull request's description.  const [bodyScope, setBodyScope] = useState<string | null>(null);  const [bodySaving, setBodySaving] = useState(false);  // The remark being rewritten, named with the pull request it belongs to: a comment id is the  // host's own, and two hosts — or two pull requests on Azure DevOps, which numbers a remark  // inside its thread — hand out the same one. Without the pull request beside it, opening a  // different one would leave its like-numbered remark sitting open in an editor.  const [commentScope, setCommentScope] = useState<{    readonly pullRequest: string;    readonly commentId: string;  } | null>(null);  const [commentSaving, setCommentSaving] = useState(false);  const editingCommentId = commentScope?.pullRequest === detail.url ? commentScope.commentId : null;   const saveBody = async (body: string) => {    if (bodySaving) return;    setBodySaving(true);    const result = await update({ environmentId, input: { ...reference, body } });    setBodySaving(false);    if (result._tag === "Failure") {      toastManager.add({ type: "error", title: "Could not save the description" });      return;    }    setBodyScope(null);    onRefresh();  };   const commentEditing: CommentEditing = {    cwd: detail.workspaceRoot,    canEdit: (comment) => canEditPullRequestComment(detail, comment),    editingId: editingCommentId,    saving: commentSaving,    onEdit: (comment) =>      setCommentScope(comment === null ? null : { pullRequest: detail.url, commentId: comment.id }),    onSave: async (comment, body) => {      // A review's own summary is not a kind any host rewrites, which is why no pencil is ever      // offered on one; the check is here because the comment's own type still allows it.      if (commentSaving || comment.kind === "review") return;      setCommentSaving(true);      const result = await updateComment({        environmentId,        input: { ...reference, commentId: comment.id, kind: comment.kind, body },      });      setCommentSaving(false);      if (result._tag === "Failure") {        toastManager.add({ type: "error", title: "Could not save the comment" });        return;      }      setCommentScope(null);      onRefresh();    },  };   return (    <div className="h-full overflow-y-auto" data-pull-request-summary-scroll>      <section className="px-4 py-3">        <div>          <MetaRow icon={<UsersIcon className="size-3.5" />} label="Reviewers">            <span className="flex min-w-0 flex-wrap items-center gap-1.5">              {detail.reviewers.length === 0 ? (                <span className="text-muted-foreground">None</span>              ) : (                <span className="flex items-center -space-x-1">                  {detail.reviewers.map((actor) => (                    <Tooltip key={actor.login}>                      <TooltipTrigger                        render={                          <span                            className="relative rounded-full hover:z-10"                            aria-label={actor.name ?? actor.login}                          />                        }                      >                        <PullRequestActorLabel                          actor={actor}                          className="gap-0 [&>img]:ring-2 [&>img]:ring-background [&>span:first-child]:ring-2 [&>span:first-child]:ring-background [&>span:last-child]:sr-only"                        />                      </TooltipTrigger>                      <TooltipPopup side="bottom">                        {actor.name && actor.name !== actor.login                          ? `${actor.name} (@${actor.login})`                          : actor.login}                      </TooltipPopup>                    </Tooltip>                  ))}                </span>              )}              {/* Shown wherever the host can take a review request at all, and disabled with the                  reason where this account may not make one: a control that vanishes teaches                  nobody why, and "you need write access" is the answer to the question a reader                  actually has. Azure DevOps is the exception — it takes a reviewer but will not                  say who could be one, so there is nothing to open. */}              {detail.capabilities.reviewers.request &&              detail.capabilities.reviewers.listCandidates ? (                <PullRequestReviewerPicker                  environmentId={environmentId}                  reference={reference}                  allowed={detail.viewerPermissions.requestReviewers}

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