GitHub comment

import {Easing, Fill, interpolate, spring, typingFrames, useBrand, useDesignScale, useFrame, useTyping, useVideo} from "odori";
import type {ReactNode} from "react";

export type GithubCommentProps = {
  /** The repository, as the breadcrumb states it. */
  owner?: string;
  repo?: string;
  /** The pull request. */
  title?: string;
  number?: number;
  /** Branches, for the line under the title. */
  branch?: string;
  base?: string;
  /** The comment that asked for something. */
  request?: {author: string; body: string; time?: string};
  /** Who is answering, and what they say. The body types in. */
  agent?: {name: string; body: string; time?: string};
  /** A suggested change under the reply. */
  suggestion?: {file: string; removed?: string; added?: string};
  /** The check the reply ends on. */
  resolved?: string;
  /** Names in the sidebar's reviewers list. */
  reviewers?: string[];
  labels?: string[];
  thinkingFrames?: number;
  theme?: "light" | "dimmed";
  charactersPerSecond?: number;
};

/** Primer's dark tokens, as GitHub ships them. */
/**
 * GitHub's palettes, read out of its own custom properties.
 *
 * "dimmed" is that theme exactly, and it is what this component used to be
 * hard-coded to; light is what GitHub opens as, and there was no way to ask
 * for it at all.
 */
const PALETTE = {
  light: {
    header: "#F6F8FA",
    canvas: "#FFFFFF",
    inset: "#F6F8FA",
    edge: "#D1D9E0",
    ink: "#1F2328",
    muted: "#59636E",
    link: "#0969DA",
    open: "#1F883D",
    bot: "#8250DF",
  },
  dimmed: {
    header: "#151B23",
    canvas: "#212830",
    inset: "#262C36",
    edge: "#3D444D",
    ink: "#D1D7E0",
    muted: "#9198A1",
    link: "#478BE6",
    open: "#347D39",
    bot: "#8256D0",
  },
};
const FONT = '"Mona Sans VF", "Mona Sans", -apple-system, "Segoe UI", "Noto Sans", Helvetica, Arial, sans-serif';
const ORANGE = "#FD8C73";

/**
 * GitHub's default avatar is an identicon, not a letter.
 *
 * A five by five grid, mirrored down the middle, inset by a margin the way
 * GitHub insets it, with the filled cells and the colour both derived from a
 * hash of the login. GitHub keys it off the account id; the login stands in
 * here, and the only property that matters is the one GitHub relies on: the
 * same name always draws the same mark.
 */
const identicon = (name: string, size: number, px: (value: number) => number) => {
  /* FNV-1a, then a mix, because a plain multiply-and-add leaves the low bits
     barely changed between similar logins and every mark comes out alike. */
  let hash = 0x811c9dc5;
  for (const character of name) {
    hash = (hash ^ character.codePointAt(0)!) >>> 0;
    hash = Math.imul(hash, 0x01000193) >>> 0;
  }
  hash = (hash ^ (hash >>> 15)) >>> 0;
  hash = Math.imul(hash, 0x2545f491) >>> 0;
  hash = (hash ^ (hash >>> 13)) >>> 0;

  const ink = `hsl(${hash % 360} 58% 50%)`;
  const margin = size / 12;
  const cell = (size - margin * 2) / 5;
  const cells = [];
  for (let column = 0; column < 3; column += 1) {
    for (let row = 0; row < 5; row += 1) {
      /* One bit per cell, taken from a different part of the word each time
         so the three columns do not repeat one another. */
      const bit = (Math.imul(hash, column * 5 + row + 1) >>> ((column * 5 + row) % 13)) & 1;
      if (!bit) continue;
      for (const x of column === 2 ? [2] : [column, 4 - column]) {
        cells.push(
          <rect
            key={`${x}-${row}`}
            x={margin + x * cell}
            y={margin + row * cell}
            width={cell}
            height={cell}
            fill={ink}
          />,
        );
      }
    }
  }

  return (
    <span style={{borderRadius: px(999), flex: "none", lineHeight: 0, overflow: "hidden"}}>
      <svg width={px(size)} height={px(size)} viewBox={`0 0 ${size} ${size}`}>
        <rect width={size} height={size} fill="#F0F0F0" />
        {cells}
      </svg>
    </span>
  );
};

/**
 * An agent answering on a pull request, on the page the answer appears on.
 *
 * A comment card alone is a screenshot of a comment. The page is what says
 * where the agent is working: the repository above it, the pull request tabs
 * counting what is in review, the timeline the reply joins, and the sidebar
 * that names who is expected to look. The order inside is still the story,
 * though, and it does not change: a person asks, the agent shows it is
 * working, and only then does the answer write itself in.
 */
export const GithubComment = ({
  owner = "johndoe",
  repo = "odori",
  title = "Pin the render toolchain",
  number = 128,
  branch = "fix/toolchain-pin",
  base = "main",
  request = {
    author: "johndoe",
    body: "Why did the export change size between two runs on the same commit?",
    time: "9:38 AM",
  },
  agent = {
    name: "odori-agent",
    body: "The two runs used different FFmpeg builds, so the encoder defaults differed. Pinning both binaries makes the output byte for byte reproducible.",
    time: "9:41 AM",
  },
  suggestion,
  resolved = "Resolved conversation",
  reviewers = ["janedoe", "samdoe"],
  labels = ["render", "bug"],
  thinkingFrames = 30,
  theme = "light",
  charactersPerSecond = 34,
}: GithubCommentProps) => {
  const frame = useFrame();
  const {fps} = useVideo();
  const brand = useBrand();
  const scale = useDesignScale();
  const colors = PALETTE[theme];
  /* Set at the zoom a screen capture is shown at, not at the browser's own
     point sizes: 17px body text is legible on a laptop and a caption strip in
     a video frame. The page crops at the card's edge, the way a capture does. */
  const px = (value: number) => value * scale * 1.38;

  /* The typing is the reviewer's: they write the question into the comment
     box and post it, and the agent's answer arrives as a whole comment. */
  const typeFrom = 14;
  const askAt = typeFrom + typingFrames(request?.body ?? "", {charactersPerSecond}) + 10;
  const workingAt = askAt + 18;
  const replyAt = workingAt + thinkingFrames;
  const enter = interpolate(frame, [0, 14], [0, 1], {easing: Easing.standard});
  const typed = useTyping(request?.body ?? "", {from: typeFrom, charactersPerSecond, chunk: 2});
  const asked = spring({frame, fps, delayInFrames: askAt, stiffness: 150, damping: 16});
  const answering = spring({frame, fps, delayInFrames: workingAt, stiffness: 150, damping: 16});
  const posted = frame >= askAt;
  const landed = frame >= replyAt;
  const working = frame >= workingAt && frame < replyAt;
  const after = interpolate(landed ? frame : 0, [0, 12], [0, 1], {easing: Easing.standard});

  /**
   * A person gets an identicon, the way GitHub draws an account with no
   * picture. An app keeps a solid mark, because that is what a GitHub App
   * shows and it is the fastest way to tell the two apart in a frame.
   */
  const avatar = (name: string, color: string | null, size = 40) =>
    color === null ? (
      identicon(name, size, px)
    ) : (
      <span
        style={{
          alignItems: "center",
          background: color,
          borderRadius: px(999),
          color: "#FFFFFF",
          display: "flex",
          flex: "none",
          fontSize: px(size * 0.42),
          fontWeight: 600,
          height: px(size),
          justifyContent: "center",
          width: px(size),
        }}
      >
        {name.slice(0, 1).toUpperCase()}
      </span>
    );

  /** A comment, drawn the way the timeline draws one: a strip, then a body. */
  const comment = (
    who: {name: string; time?: string; bot?: boolean},
    landed: number,
    body: ReactNode,
    footer?: ReactNode,
  ) => (
    <div
      style={{
        border: `${px(1)}px solid ${who.bot && landed ? colors.bot : colors.edge}`,
        borderRadius: px(10),
        marginTop: px(16),
        opacity: landed,
        overflow: "hidden",
        transform: `translateY(${(1 - landed) * px(8)}px)`,
      }}
    >
      <div
        style={{
          alignItems: "center",
          background: colors.inset,
          borderBottom: `${px(1)}px solid ${colors.edge}`,
          display: "flex",
          gap: px(10),
          padding: `${px(12)}px ${px(16)}px`,
        }}
      >
        {avatar(who.name, who.bot ? colors.bot : null, 30)}
        <span style={{color: colors.ink, fontSize: px(19), fontWeight: 600}}>{who.name}</span>
        {who.bot ? (
          <span
            style={{
              border: `${px(1)}px solid ${colors.edge}`,
              borderRadius: px(999),
              color: colors.muted,
              fontSize: px(14),
              padding: `${px(1)}px ${px(8)}px`,
            }}
          >
            bot
          </span>
        ) : null}
        <span style={{color: colors.muted, fontSize: px(17)}}>
          {who.bot && !landed ? "is working" : `commented ${who.time ?? ""}`}
        </span>
      </div>
      <div style={{padding: `${px(16)}px ${px(18)}px`}}>{body}</div>
      {footer}
    </div>
  );

  const dots = (
    <span style={{alignItems: "center", display: "inline-flex", gap: px(7), height: px(26)}}>
      {[0, 1, 2].map((dot) => (
        <span
          key={dot}
          style={{
            background: colors.muted,
            borderRadius: px(999),
            height: px(9),
            opacity: 0.35 + 0.65 * Math.max(0, Math.sin(((frame - dot * 4) / fps) * Math.PI * 2)),
            width: px(9),
          }}
        />
      ))}
    </span>
  );

  const sidebarSection = (heading: string, body: ReactNode) => (
    <div style={{borderBottom: `${px(1)}px solid ${colors.edge}`, padding: `${px(18)}px 0`}}>
      <div style={{color: colors.muted, fontSize: px(17), fontWeight: 600, marginBottom: px(10)}}>{heading}</div>
      {body}
    </div>
  );

  return (
    <Fill style={{background: theme === "light" ? "#E7EAEE" : "#010409", padding: px(34)}}>
      <div
        style={{
          background: colors.canvas,
          borderRadius: px(12),
          display: "flex",
          flexDirection: "column",
          fontFamily: FONT,
          height: "100%",
          opacity: enter,
          overflow: "hidden",
          transform: `translateY(${(1 - enter) * px(12)}px)`,
          width: "100%",
        }}
      >
        {/* The site header and the repository's own nav. */}
        <div style={{background: colors.header, borderBottom: `${px(1)}px solid ${colors.edge}`}}>
          <div style={{alignItems: "center", display: "flex", gap: px(16), padding: `${px(14)}px ${px(22)}px`}}>
            {identicon(owner, 30, px)}
            <span style={{color: colors.ink, fontSize: px(19)}}>
              <span style={{color: colors.link}}>{owner}</span>
              <span style={{color: colors.muted}}> / </span>
              <span style={{color: colors.link, fontWeight: 600}}>{repo}</span>
            </span>
            <span
              style={{
                border: `${px(1)}px solid ${colors.edge}`,
                borderRadius: px(7),
                color: colors.muted,
                fontSize: px(16),
                marginLeft: "auto",
                padding: `${px(7)}px ${px(60)}px ${px(7)}px ${px(12)}px`,
              }}
            >
              Search
            </span>
          </div>
          <div style={{display: "flex", gap: px(22), padding: `0 ${px(22)}px`}}>
            {["Code", "Issues", "Pull requests", "Actions", "Insights"].map((tab) => (
              <span
                key={tab}
                style={{
                  borderBottom: `${px(2)}px solid ${tab === "Pull requests" ? ORANGE : "transparent"}`,
                  color: tab === "Pull requests" ? colors.ink : colors.muted,
                  fontSize: px(17),
                  fontWeight: tab === "Pull requests" ? 600 : 400,
                  paddingBottom: px(11),
                }}
              >
                {tab}
              </span>
            ))}
          </div>
        </div>

        <div style={{display: "flex", flex: 1, flexDirection: "column", minHeight: 0, padding: `${px(22)}px ${px(28)}px 0`}}>
          <div style={{color: colors.ink, fontSize: px(32), fontWeight: 400, letterSpacing: "-0.01em"}}>
            {title} <span style={{color: colors.muted}}>#{number}</span>
          </div>

          <div style={{alignItems: "center", display: "flex", gap: px(12), marginTop: px(14)}}>
            <span
              style={{
                alignItems: "center",
                background: colors.open,
                borderRadius: px(999),
                color: "#FFFFFF",
                display: "inline-flex",
                fontSize: px(17),
                fontWeight: 600,
                padding: `${px(6)}px ${px(14)}px`,
              }}
            >
              Open
            </span>
            <span style={{color: colors.muted, fontSize: px(18)}}>
              <span style={{color: colors.ink}}>{request?.author}</span> wants to merge 3 commits into{" "}
              <span style={{background: colors.inset, borderRadius: px(5), color: colors.ink, fontFamily: brand.typography.mono, padding: `${px(2)}px ${px(7)}px`}}>
                {base}
              </span>{" "}
              from{" "}
              <span style={{background: colors.inset, borderRadius: px(5), color: colors.ink, fontFamily: brand.typography.mono, padding: `${px(2)}px ${px(7)}px`}}>
                {branch}
              </span>
            </span>
          </div>

          <div style={{borderBottom: `${px(1)}px solid ${colors.edge}`, display: "flex", gap: px(24), marginTop: px(18)}}>
            {[
              ["Conversation", "2"],
              ["Commits", "3"],
              ["Checks", "3"],
              ["Files changed", "6"],
            ].map(([tab, count]) => (
              <span
                key={tab}
                style={{
                  alignItems: "center",
                  borderBottom: `${px(2)}px solid ${tab === "Conversation" ? ORANGE : "transparent"}`,
                  color: tab === "Conversation" ? colors.ink : colors.muted,
                  display: "flex",
                  fontSize: px(18),
                  fontWeight: tab === "Conversation" ? 600 : 400,
                  gap: px(8),
                  paddingBottom: px(12),
                }}
              >
                {tab}
                <span style={{background: colors.inset, borderRadius: px(999), color: colors.muted, fontSize: px(15), padding: `${px(1)}px ${px(8)}px`}}>
                  {count}
                </span>
              </span>
            ))}
          </div>

          <div style={{display: "flex", flex: 1, gap: px(28), minHeight: 0, paddingTop: px(6)}}>
            {/* The timeline. */}
            <div style={{flex: 1, minWidth: 0}}>
              {request && posted ? comment({name: request.author, time: request.time}, asked, <span style={{color: colors.ink, fontSize: px(20), lineHeight: 1.55}}>{request.body}</span>) : null}

              {frame >= workingAt && agent
                ? comment(
                    {name: agent.name, time: agent.time, bot: true},
                    answering,
                    <div style={{minHeight: px(60)}}>
                      {working ? (
                        dots
                      ) : (
                        <span style={{color: colors.ink, fontSize: px(20), lineHeight: 1.55}}>{agent.body}</span>
                      )}

                      {suggestion && landed ? (
                        <div
                          style={{
                            border: `${px(1)}px solid ${colors.edge}`,
                            borderRadius: px(8),
                            fontFamily: brand.typography.mono,
                            fontSize: px(17),
                            marginTop: px(14),
                            opacity: after,
                            overflow: "hidden",
                          }}
                        >
                          <div style={{background: colors.inset, borderBottom: `${px(1)}px solid ${colors.edge}`, color: colors.muted, padding: `${px(9)}px ${px(14)}px`}}>
                            {suggestion.file}
                          </div>
                          {suggestion.removed ? (
                            <div style={{background: "rgba(248,81,73,0.12)", color: colors.ink, padding: `${px(7)}px ${px(14)}px`}}>
                              <span style={{color: "#F85149"}}>- </span>
                              {suggestion.removed}
                            </div>
                          ) : null}
                          {suggestion.added ? (
                            <div style={{background: "rgba(63,185,80,0.12)", color: colors.ink, padding: `${px(7)}px ${px(14)}px`}}>
                              <span style={{color: "#3FB950"}}>+ </span>
                              {suggestion.added}
                            </div>
                          ) : null}
                        </div>
                      ) : null}
                    </div>,
                    resolved && landed ? (
                      <div
                        style={{
                          alignItems: "center",
                          borderTop: `${px(1)}px solid ${colors.edge}`,
                          color: colors.muted,
                          display: "flex",
                          fontSize: px(18),
                          gap: px(10),
                          opacity: after,
                          padding: `${px(12)}px ${px(18)}px`,
                        }}
                      >
                        <svg viewBox="0 0 24 24" width={px(20)} height={px(20)}>
                          <circle cx="12" cy="12" r="10" fill={colors.bot} />
                          <path d="M7.5 12.2l3 3 6-6.4" fill="none" stroke={colors.canvas} strokeLinecap="round" strokeLinejoin="round" strokeWidth={2.4} />
                        </svg>
                        {resolved}
                      </div>
                    ) : undefined,
                  )
                : null}

              {/* The comment box, where the question is actually written.
                  It empties on post, the way the real one does. */}
              <div
                style={{
                  border: `${px(1)}px solid ${colors.edge}`,
                  borderRadius: px(10),
                  marginTop: px(16),
                  overflow: "hidden",
                }}
              >
                <div
                  style={{
                    background: colors.inset,
                    borderBottom: `${px(1)}px solid ${colors.edge}`,
                    color: colors.ink,
                    fontSize: px(18),
                    fontWeight: 600,
                    padding: `${px(10)}px ${px(16)}px`,
                  }}
                >
                  Write
                </div>
                <div style={{color: posted ? colors.muted : colors.ink, fontSize: px(20), lineHeight: 1.55, minHeight: px(56), padding: `${px(14)}px ${px(18)}px`}}>
                  {posted ? (
                    "Add your comment here..."
                  ) : (
                    <>
                      {typed.text}
                      {typed.caret ? (
                        <span
                          style={{
                            background: colors.ink,
                            display: "inline-block",
                            height: px(19),
                            marginLeft: px(2),
                            transform: `translateY(${px(3)}px)`,
                            width: px(2),
                          }}
                        />
                      ) : null}
                    </>
                  )}
                </div>
              </div>
            </div>

            {/* The sidebar, which names who is expected to look. */}
            <div style={{flex: "none", width: px(330)}}>
              {sidebarSection(
                "Reviewers",
                <div style={{display: "grid", gap: px(10)}}>
                  {reviewers.map((name) => (
                    <span key={name} style={{alignItems: "center", color: colors.ink, display: "flex", fontSize: px(18), gap: px(10)}}>
                      {avatar(name, null, 26)}
                      {name}
                    </span>
                  ))}
                </div>,
              )}
              {sidebarSection(
                "Assignees",
                <span style={{alignItems: "center", color: colors.ink, display: "flex", fontSize: px(18), gap: px(10)}}>
                  {avatar(agent?.name ?? "odori", colors.bot, 26)}
                  {agent?.name}
                </span>,
              )}
              {sidebarSection(
                "Labels",
                <div style={{display: "flex", flexWrap: "wrap", gap: px(8)}}>
                  {labels.map((label) => (
                    <span
                      key={label}
                      style={{
                        border: `${px(1)}px solid ${colors.edge}`,
                        borderRadius: px(999),
                        color: colors.muted,
                        fontSize: px(16),
                        padding: `${px(4)}px ${px(12)}px`,
                      }}
                    >
                      {label}
                    </span>
                  ))}
                </div>,
              )}
            </div>
          </div>
        </div>
      </div>
    </Fill>
  );
};

import {defineComponentPreview} from "odori/preview";
import {GithubComment} from "./github-comment";

export default defineComponentPreview({
  title: "GitHub comment",
  category: "Products",
  description: "An agent response on a GitHub pull request.",
  component: GithubComment,
  canvas: {width: 1920, height: 1080, duration: "9s"},
  controls: {
    title: {type: "text", defaultValue: "Pin the render toolchain", maxLength: 64},
    owner: {type: "text", defaultValue: "johndoe", maxLength: 28},
    repo: {type: "text", defaultValue: "odori", maxLength: 28},
    number: {type: "number", defaultValue: 128, min: 1, max: 99999, step: 1},
    resolved: {type: "text", defaultValue: "Resolved conversation", maxLength: 40},
    theme: {type: "select", defaultValue: "light", options: ["light", "dimmed"]},
    charactersPerSecond: {type: "number", defaultValue: 34, min: 10, max: 80, step: 1},
  },
  examples: [
    {name: "Default", props: {}},
    {
      name: "With a suggestion",
      props: {
        suggestion: {
          file: "packages/odori-cli/src/binaries.ts",
          removed: 'const chrome = which("chrome");',
          added: 'const chrome = await resolveBrowser(config);',
        },
      },
    },
  ],
});

import {Scene, Video} from "odori";
import {GithubComment} from "../components/github-comment/github-comment";

<Video>
  <Scene id="github-comment" duration="9s">
    <GithubComment
      owner="johndoe"
      repo="odori"
      title="Pin the render toolchain"
      number={128}
      resolved="Resolved conversation"
      theme="light"
      charactersPerSecond={34}
    />
  </Scene>
</Video>