Piko Pet Social Media Platform

// Platform-Specific Component Adapter
// Image.tsx (Web)
import React from 'react';

export const Image = ({ source, style, ...props }) => (

);

// Image.native.tsx (iOS/Android)
import FastImage from '@d11/react-native-fast-image';

export const Image = ({ source, style, ...props }) => (
  
);

// GraphQL Subscription for Real-Time Messages
import { useSubscription } from '@apollo/client';
import { graphql } from './graphql';

const NEW_MESSAGE_SUBSCRIPTION = graphql(`
  subscription OnNewMessage($chatId: ID!) {
    messageAdded(chatId: $chatId) {
      id
      content
      sender {
        id
        name
        avatar
      }
      createdAt
    }
  }
`);

export const useChatSubscription = (chatId: string) => {
  const { data, loading } = useSubscription(
    NEW_MESSAGE_SUBSCRIPTION,
    {
      variables: { chatId },
      onData: ({ data }) => {
        // Update local cache with new message
        updateChatMessages(data.messageAdded);
      },
    }
  );
  
  return { newMessage: data?.messageAdded, loading };
};

// Redux Slice with Async Thunks
import { createSlice, createAsyncThunk } from '@reduxjs/toolkit';
import { postConnector } from '@/connectors/postConnector';

export const fetchPostFeed = createAsyncThunk(
  'post/fetchFeed',
  async ({ cursor, limit }: FeedParams) => {
    const response = await postConnector.getPostFeed(cursor, limit);
    return response;
  }
);

const postSlice = createSlice({
  name: 'post',
  initialState: {
    feed: [],
    loading: false,
    error: null,
    hasMore: true,
  },
  reducers: {
    optimisticLikePost: (state, action) => {
      const post = state.feed.find(p => p.id === action.payload);
      if (post) post.isLiked = !post.isLiked;
    },
  },
  extraReducers: (builder) => {
    builder
      .addCase(fetchPostFeed.pending, (state) => {
        state.loading = true;
      })
      .addCase(fetchPostFeed.fulfilled, (state, action) => {
        state.feed = [...state.feed, ...action.payload.posts];
        state.hasMore = action.payload.hasMore;
        state.loading = false;
      });
  },
});

// LinguiJS Implementation
import { Trans, t } from '@lingui/macro';
import { useLingui } from '@lingui/react';

export const WelcomeScreen = () => {
  const { i18n } = useLingui();
  
  return (
    
      
        Welcome to PetoKingdom!
      
      
        {i18n._(t`You have ${count} new notifications`)}
      
      
    
  );
};

// Extracted messages (messages.po)
// msgid "Welcome to PetoKingdom!"
// msgstr "欢迎来到宠物王国！"

// Video Compression with FFmpeg
import { FFmpegKit } from 'ffmpeg-kit-react-native';

const compressVideo = async (inputPath: string) => {
  const outputPath = `${FileSystem.cacheDirectory}compressed_${Date.now()}.mp4`;
  
  const command = `-i ${inputPath} -c:v libx264 -crf 28 -preset fast ` +
                  `-c:a aac -b:a 128k -movflags +faststart ${outputPath}`;
  
  const session = await FFmpegKit.execute(command);
  const returnCode = await session.getReturnCode();
  
  if (returnCode.isValueSuccess()) {
    return outputPath; // Typically 60-80% size reduction
  }
  throw new Error('Compression failed');
};