const index = props.index; if (!index) { return "props.index is not defined"; } const renderItem = props.renderItem ?? ((item, i) => ( <div key={i}> #{i}: {JSON.stringify(item)} </div> )); index.options = index.options || {}; const initialRenderLimit = props.initialRenderLimit ?? index.options.limit ?? 10; index.options.limit = Math.min( Math.max(initialRenderLimit * 2, index.options.limit), 100 ); const reverse = !!props.reverse; const initialItems = Social.index(index.action, index.key, index.options); if (initialItems === null) { return ""; } const computeFetchFrom = (items, limit) => { if (!items || items.length < limit) { return false; } const blockHeight = items[items.length - 1].blockHeight; return index.options.order === "desc" ? blockHeight - 1 : blockHeight + 1; }; const mergeItems = (newItems) => { const items = [ ...new Set([...newItems, ...state.items].map((i) => JSON.stringify(i))), ].map((i) => JSON.parse(i)); items.sort((a, b) => a.blockHeight - b.blockHeight); if (index.options.order === "desc") { items.reverse(); } return items; }; const jInitialItems = JSON.stringify(initialItems); if (state.jInitialItems !== jInitialItems) { const jIndex = JSON.stringify(index); if (jIndex !== state.jIndex) { State.update({ jIndex, jInitialItems, items: initialItems, fetchFrom: false, nextFetchFrom: computeFetchFrom(initialItems, index.options.limit), displayCount: initialRenderLimit, }); } else { State.update({ jInitialItems, items: mergeItems(initialItems), }); } } if (state.fetchFrom) { const limit = Math.max(props.nextLimit, index.options.limit); const newItems = Social.index( index.action, index.key, Object.assign({}, index.options, { from: state.fetchFrom, subscribe: undefined, limit, }) ); if (newItems !== null) { State.update({ items: mergeItems(newItems), fetchFrom: false, nextFetchFrom: computeFetchFrom(newItems, limit), }); } } const makeMoreItems = () => { State.update({ displayCount: state.displayCount + (props.nextLimit ?? index.initialRenderLimit ?? index.options.limit), }); if (state.nextFetchFrom && state.nextFetchFrom !== state.fetchFrom) { State.update({ fetchFrom: state.nextFetchFrom, }); } }; const fetchMore = state.fetchFrom && state.items.length < state.displayCount ? ( <div className="loader" key={"loader"}> <span className="spinner-grow spinner-grow-sm me-1" role="status" aria-hidden="true" /> Loading ... </div> ) : ( state.displayCount < state.items.length && ( <div key={"loader more"}> <a href="javascript:void" onClick={(e) => makeMoreItems()}> {props.loadMoreText ?? "Load more..."} </a> </div> ) ); const items = state.items ? state.items.slice(0, state.displayCount) : []; if (reverse) { items.reverse(); } console.log(items); return ( <> {reverse && fetchMore} {items.map(renderItem)} {!reverse && fetchMore} </> );