Prompt Title: React: Virtual Scroll API

To implement a virtual scroll with week and year parameters in an API using React, you can follow these general steps:

1. Create a component that will handle the virtual scroll. This component should have a state to keep track of the current week and year that the user is viewing.

2. In the component's componentDidMount method, make an API request to get the data for the initial week and year. You can use a library like Axios to make the API request.

3. In the response callback of the API request, update the component's state with the received data.

4. Create a virtual scrolling mechanism that listens to scroll events on the page. You can use a library like react-virtualized to implement this.

5. When the user scrolls to the end of the current data set, make another API request to get the next week and year's data.

6. In the response callback of the API request, append the received data to the current data set and update the component's state with the new data.

7. Render the data using a component that takes in the current week and year as props.

Here's some sample code that demonstrates these steps:

javascriptCopy code
import React, { Component } from 'react';
import axios from 'axios';
import { List, AutoSizer } from 'react-virtualized';

class VirtualScroll extends Component {
  state = {
    data: [],
    week: 1,
    year: 2022,
  };

  componentDidMount() {
    this.loadData();
  }

  loadData = () => {
    const { week, year } = this.state;
    axios.get(`/api/data?week=${week}&year=${year}`)
      .then(response => {
        const newData = response.data;
        this.setState(prevState => ({ data: [...prevState.data, ...newData] }));
      })
      .catch(error => console.log(error));
  };

  handleScroll = ({ clientHeight, scrollHeight, scrollTop }) => {
    if (scrollHeight - scrollTop <= clientHeight) {
      this.setState(prevState => ({ week: prevState.week + 1 }), this.loadData);
    }
  };

  renderRow = ({ index, key, style }) => {
    const { data } = this.state;
    const { week, year } = data

Sure, here's an example of how you can implement a virtual scroll with week and year parameters in an API using React functional components:

javascriptCopy code
import React, { useState, useEffect, useRef } from 'react';
import axios from 'axios';
import { List, AutoSizer } from 'react-virtualized';

const VirtualScroll = () => {
  const [data, setData] = useState([]);
  const [week, setWeek] = useState(1);
  const [year, setYear] = useState(2022);
  const listRef = useRef();

  useEffect(() => {
    loadData();
  }, []);

  const loadData = () => {
    axios.get(`/api/data?week=${week}&year=${year}`)
      .then(response => {
        const newData = response.data;
        setData(prevData => [...prevData, ...newData]);
      })
      .catch(error => console.log(error));
  };

  const handleScroll = () => {
    const { clientHeight, scrollHeight, scrollTop } = listRef.current;
    if (scrollHeight - scrollTop <= clientHeight) {
      setWeek(prevWeek => prevWeek + 1);
    }
  };

  useEffect(() => {
    loadData();
  }, [week]);

  const rowRenderer = ({ index, key, style }) => {
    const { week, year } = data[index];
    return <div key={key} style={style}>{`Week ${week}, ${year}`}</div>;
  };

  return (
    <AutoSizer>
      {({ height, width }) => (
        <List
          ref={listRef}
          height={height}
          width={width}
          rowCount={data.length}
          rowHeight={30}
          rowRenderer={rowRenderer}
          onScroll={handleScroll}
        />
      )}
    </AutoSizer>
  );
};

export default VirtualScroll;

In this example, we use the useState hook to manage the component's state for the data, week, and year. We also use the useEffect hook to load the initial data when the component mounts, and to load more data whenever the week changes.

We use the useRef hook to get a reference to the List component from react-virtualized, which we use to detect when the user has scrolled to the end of the current data set.

We define a rowRenderer function to render each row of data, and pass it to the List component. The handleScroll function is called when the user scrolls to the end of the current data set, and it updates the week state, which triggers another API call to load more data. Finally, we use AutoSizer from react-virtualized to automatically resize the List component based on the available space.