@nostr-dev-kit/ndk-mobile/dist/module/components/event/content.js

NDK Mobile

"use strict";

/**
 * A React Native component that renders Nostr event content with rich formatting support.
 * Handles rendering of mentions, hashtags, URLs, emojis, and images within event content.
 *
 * Features:
 * - Renders nostr: mentions with optional custom mention component
 * - Formats hashtags with optional press handling
 * - Renders URLs and images with press handling
 * - Supports custom emoji rendering from event tags
 * - Special handling for reaction events (❤️, 👎)
 *
 * @package @nostr-dev-kit/ndk-mobile
 */

import { NDKKind, NDKUser } from "@nostr-dev-kit/ndk-hooks";
import { Image } from "expo-image";
// biome-ignore lint/style/useImportType: <explanation>
import React from "react";
import { useEffect, useState } from "react";
import { Pressable, StyleSheet, Text } from "react-native";
import { useNDK, useProfileValue } from "@nostr-dev-kit/ndk-hooks";
import { jsxs as _jsxs, jsx as _jsx } from "react/jsx-runtime";
const styles = StyleSheet.create({
  mention: {
    fontWeight: "bold",
    color: "#0066CC"
  },
  hashtag: {
    fontWeight: "bold",
    color: "#0066CC"
  },
  url: {
    fontWeight: "bold",
    color: "#0066CC",
    textDecorationLine: "underline"
  },
  image: {
    width: "100%",
    height: "100%",
    resizeMode: "cover",
    borderRadius: 12
  }
});

/**
 * Props for the EventContent component
 */

/**
 * Renders an emoji from an event's emoji tags
 */
function RenderEmoji({
  shortcode,
  event,
  fontSize
}) {
  if (!event) return /*#__PURE__*/_jsxs(Text, {
    style: {
      fontSize
    },
    children: [":", shortcode, ":"]
  });
  const emojiTag = event.tags.find(tag => tag[0] === "emoji" && tag[1] === shortcode);
  if (!emojiTag || !emojiTag[2]) return /*#__PURE__*/_jsxs(Text, {
    style: {
      fontSize
    },
    children: [":", shortcode, ":"]
  });
  const emojiSize = fontSize || 14;
  return /*#__PURE__*/_jsx(Image, {
    source: {
      uri: emojiTag[2]
    },
    style: {
      width: emojiSize,
      height: emojiSize,
      resizeMode: "contain"
    }
  });
}

/**
 * Renders a hashtag with optional press handling
 */
function RenderHashtag({
  hashtag,
  onHashtagPress,
  fontSize,
  style
}) {
  const combinedStyle = [styles.hashtag, {
    fontSize
  }, style];
  if (onHashtagPress) {
    return /*#__PURE__*/_jsxs(Text, {
      onPress: () => onHashtagPress(`#${hashtag}`),
      style: combinedStyle,
      children: ["#", hashtag]
    });
  }
  return /*#__PURE__*/_jsxs(Text, {
    style: combinedStyle,
    children: ["#", hashtag]
  });
}

/**
 * Renders a Nostr mention (npub or nprofile) with optional custom component
 */

function RenderMention({
  user,
  onUserPress,
  MentionComponent,
  fontSize,
  style
}) {
  const userProfile = useProfileValue(user.pubkey);
  const combinedStyle = [styles.mention, {
    fontSize
  }, style];
  return /*#__PURE__*/_jsxs(Text, {
    style: combinedStyle,
    onPress: () => onUserPress?.(user.pubkey),
    children: ["@", MentionComponent ? /*#__PURE__*/_jsx(MentionComponent, {
      pubkey: user.pubkey
    }) : userProfile?.name ?? user.pubkey.substring(0, 8)]
  });
}
function RenderEvent({
  entity,
  onUserPress
}) {
  const {
    ndk
  } = useNDK();
  const [event, setEvent] = useState(null);
  useEffect(() => {
    if (!entity) return;
    ndk.fetchEvent(entity).then(event => setEvent(event));
  }, [entity]);
  if (!event) return /*#__PURE__*/_jsx(Text, {
    children: entity
  });
  return /*#__PURE__*/_jsx(EventContent, {
    event: event,
    onUserPress: onUserPress
  });
}

/**
 * Renders a part of the content with appropriate formatting based on content type
 * Handles:
 * - Emoji shortcodes (:shortcode:)
 * - Image URLs
 * - Regular URLs
 * - Nostr mentions (nostr:npub1...)
 * - Hashtags (#hashtag)
 * - Plain text
 */
function RenderPart({
  part,
  onUserPress,
  onHashtagPress,
  onUrlPress,
  MentionComponent,
  event,
  style,
  ...props
}) {
  const {
    ndk
  } = useNDK();
  const fontSize = style?.fontSize;

  // Check for emoji shortcode
  const emojiMatch = part.match(/^:([a-zA-Z0-9_+-]+):$/);
  if (emojiMatch) {
    return /*#__PURE__*/_jsx(RenderEmoji, {
      shortcode: emojiMatch[1],
      event: event,
      fontSize: fontSize
    });
  }
  if (part.startsWith("https://") && part.match(/\.(jpg|jpeg|png|gif)/)) {
    return /*#__PURE__*/_jsx(Pressable, {
      onPress: () => onUrlPress?.(part),
      children: /*#__PURE__*/_jsx(Image, {
        source: {
          uri: part
        },
        style: [styles.image, style]
      })
    });
  }
  if (part.startsWith("https://") || part.startsWith("http://")) {
    return /*#__PURE__*/_jsx(Text, {
      style: [styles.url, style],
      onPress: () => onUrlPress?.(part),
      children: part
    });
  }
  const mentionMatch = part.match(/nostr:([a-zA-Z0-9]+)/)?.[1];
  if (mentionMatch) {
    const entity = ndk.getEntity(mentionMatch);
    if (entity instanceof NDKUser) {
      if (MentionComponent) {
        return /*#__PURE__*/_jsx(MentionComponent, {
          pubkey: entity.pubkey
        });
      }
      return /*#__PURE__*/_jsx(RenderMention, {
        user: entity,
        onUserPress: onUserPress,
        fontSize: fontSize,
        style: style
      });
    }
    if (entity) {
      return /*#__PURE__*/_jsx(RenderEvent, {
        entity: mentionMatch,
        onUserPress: onUserPress
      });
    }
  }
  const hashtagMatch = part.match(/^#([\p{L}\p{N}_\-]+)/u);
  if (hashtagMatch) {
    return /*#__PURE__*/_jsx(RenderHashtag, {
      hashtag: hashtagMatch[1],
      onHashtagPress: onHashtagPress,
      fontSize: fontSize,
      style: style
    });
  }
  return /*#__PURE__*/_jsx(Text, {
    style: {
      ...style,
      fontSize
    },
    ...props,
    children: part
  });
}

/**
 * Main component for rendering Nostr event content with rich formatting
 *
 * @example
 * ```tsx
 * // Basic usage
 * <EventContent event={ndkEvent} />
 *
 * // With custom handlers
 * <EventContent
 *     event={ndkEvent}
 *     onUserPress={(pubkey) => console.log('User pressed:', pubkey)}
 *     onHashtagPress={(hashtag) => console.log('Hashtag pressed:', hashtag)}
 *     onUrlPress={(url) => console.log('URL pressed:', url)}
 * />
 *
 * // With custom mention component
 * <EventContent
 *     event={ndkEvent}
 *     MentionComponent={({ pubkey }) => <UserName pubkey={pubkey} />}
 * />
 * ```
 */
const EventContent = ({
  event,
  numberOfLines,
  content,
  style,
  onUserPress,
  onHashtagPress,
  onUrlPress,
  MentionComponent,
  ...props
}) => {
  if (!event && !content) return null;

  // Handle reaction events
  if (event?.kind === NDKKind.Reaction) {
    return /*#__PURE__*/_jsx(Text, {
      style: style,
      children: event.content || "❤️"
    });
  }
  const contentToRender = content || event?.content || "";
  const parts = contentToRender.split(/(\s+|(?=https?:\/\/)|(?<=\s)#[\p{L}\p{N}_\-]+|(?<=\s)nostr:[a-zA-Z0-9]+|:[a-zA-Z0-9_+-]+:)/u);
  return /*#__PURE__*/_jsx(Text, {
    numberOfLines: numberOfLines,
    style: style,
    ...props,
    children: parts.map((part, index) => /*#__PURE__*/_jsx(RenderPart, {
      part: part,
      onUserPress: onUserPress,
      onHashtagPress: onHashtagPress,
      onUrlPress: onUrlPress,
      MentionComponent: MentionComponent,
      event: event,
      style: style
    }, index))
  });
};
export default EventContent;
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