Add transaction card component and provider (#5)

explorer/src/App.tsx

@@ -1,28 +1,40 @@
 import React from "react";
 import { NetworkProvider } from "./providers/network";
-import NetworkStatusButton from "./components/networkStatusButton";
+import { TransactionsProvider } from "./providers/transactions";
+import NetworkStatusButton from "./components/NetworkStatusButton";
+import TransactionsCard from "./components/TransactionsCard";
 
 function App() {
   return (
-    <div className="main-content">
-      <div className="header">
-        <div className="container-fluid">
-          <div className="header-body">
-            <div className="row align-items-end">
-              <div className="col">
-                <h6 className="header-pretitle">Beta</h6>
-                <h1 className="header-title">Solana Explorer</h1>
-              </div>
-              <div className="col-auto">
-                <NetworkProvider>
+    <NetworkProvider>
+      <div className="main-content">
+        <div className="header">
+          <div className="container">
+            <div className="header-body">
+              <div className="row align-items-end">
+                <div className="col">
+                  <h6 className="header-pretitle">Beta</h6>
+                  <h1 className="header-title">Solana Explorer</h1>
+                </div>
+                <div className="col-auto">
                   <NetworkStatusButton />
-                </NetworkProvider>
+                </div>
               </div>
             </div>
           </div>
         </div>
+
+        <div className="container">
+          <div className="row">
+            <div className="col-12">
+              <TransactionsProvider>
+                <TransactionsCard />
+              </TransactionsProvider>
+            </div>
+          </div>
+        </div>
       </div>
-    </div>
+    </NetworkProvider>
   );
 }
 

explorer/src/components/NetworkStatusButton.tsx

@@ -6,22 +6,22 @@ function NetworkStatusButton() {
 
   switch (status) {
     case NetworkStatus.Connected:
-      return <a className="btn btn-primary lift">{url}</a>;
+      return <span className="btn btn-white lift">{url}</span>;
 
     case NetworkStatus.Connecting:
       return (
-        <a className="btn btn-warning lift">
+        <span className="btn btn-warning lift">
           {"Connecting "}
           <span
             className="spinner-grow spinner-grow-sm text-dark"
             role="status"
             aria-hidden="true"
           ></span>
-        </a>
+        </span>
       );
 
     case NetworkStatus.Failure:
-      return <a className="btn btn-danger lift">Disconnected</a>;
+      return <span className="btn btn-danger lift">Disconnected</span>;
   }
 }
 

explorer/src/components/TransactionsCard.tsx

@@ -0,0 +1,88 @@
+import React from "react";
+import {
+  useTransactions,
+  Transaction,
+  Status
+} from "../providers/transactions";
+
+function TransactionsCard() {
+  const { transactions } = useTransactions();
+
+  return (
+    <div className="card">
+      {renderHeader()}
+
+      <div className="table-responsive mb-0">
+        <table className="table table-sm table-nowrap card-table">
+          <thead>
+            <tr>
+              <th className="text-muted">Status</th>
+              <th className="text-muted">Signature</th>
+              <th className="text-muted">Confirmations</th>
+              <th className="text-muted">Slot Number</th>
+            </tr>
+          </thead>
+          <tbody className="list">
+            {Object.values(transactions).map(transaction =>
+              renderTransactionRow(transaction)
+            )}
+          </tbody>
+        </table>
+      </div>
+    </div>
+  );
+}
+
+const renderHeader = () => {
+  return (
+    <div className="card-header">
+      <div className="row align-items-center">
+        <div className="col">
+          <h4 className="card-header-title">Transactions</h4>
+        </div>
+      </div>
+    </div>
+  );
+};
+
+const renderTransactionRow = (transaction: Transaction) => {
+  let statusText;
+  let statusClass;
+  switch (transaction.status) {
+    case Status.CheckFailed:
+      statusClass = "dark";
+      statusText = "Network Error";
+      break;
+    case Status.Checking:
+      statusClass = "info";
+      statusText = "Checking";
+      break;
+    case Status.Success:
+      statusClass = "success";
+      statusText = "Success";
+      break;
+    case Status.Failure:
+      statusClass = "danger";
+      statusText = "Failed";
+      break;
+    case Status.Pending:
+      statusClass = "warning";
+      statusText = "Pending";
+      break;
+  }
+
+  return (
+    <tr key={transaction.signature}>
+      <td>
+        <span className={`badge badge-soft-${statusClass}`}>{statusText}</span>
+      </td>
+      <td>
+        <code>{transaction.signature}</code>
+      </td>
+      <td>TODO</td>
+      <td>TODO</td>
+    </tr>
+  );
+};
+
+export default TransactionsCard;

explorer/src/providers/transactions.tsx

@@ -0,0 +1,139 @@
+import React from "react";
+import { TransactionSignature, Connection } from "@solana/web3.js";
+import { findGetParameter } from "../utils";
+import { useNetwork } from "../providers/network";
+
+export enum Status {
+  Checking,
+  CheckFailed,
+  Success,
+  Failure,
+  Pending
+}
+
+export interface Transaction {
+  id: number;
+  status: Status;
+  recent: boolean;
+  signature: TransactionSignature;
+}
+
+type Transactions = { [id: number]: Transaction };
+interface State {
+  idCounter: number;
+  transactions: Transactions;
+}
+
+interface UpdateStatus {
+  id: number;
+  status: Status;
+}
+
+type Action = UpdateStatus;
+type Dispatch = (action: Action) => void;
+
+function reducer(state: State, action: Action): State {
+  let transaction = state.transactions[action.id];
+  if (transaction) {
+    transaction = { ...transaction, status: action.status };
+    const transactions = { ...state.transactions, [action.id]: transaction };
+    return { ...state, transactions };
+  }
+  return state;
+}
+
+function initState(): State {
+  let idCounter = 0;
+  const signatures = findGetParameter("txs")?.split(",") || [];
+  const transactions = signatures.reduce(
+    (transactions: Transactions, signature) => {
+      const id = ++idCounter;
+      transactions[id] = {
+        id,
+        status: Status.Checking,
+        recent: true,
+        signature
+      };
+      return transactions;
+    },
+    {}
+  );
+  return { idCounter, transactions };
+}
+
+const StateContext = React.createContext<State | undefined>(undefined);
+const DispatchContext = React.createContext<Dispatch | undefined>(undefined);
+
+type TransactionsProviderProps = { children: React.ReactNode };
+export function TransactionsProvider({ children }: TransactionsProviderProps) {
+  const [state, dispatch] = React.useReducer(reducer, undefined, initState);
+
+  const { status, url } = useNetwork();
+
+  // Check transaction statuses on startup and whenever network updates
+  React.useEffect(() => {
+    const connection = new Connection(url);
+    Object.values(state.transactions).forEach(tx => {
+      checkTransactionStatus(dispatch, tx, connection);
+    });
+  }, [status, url]); // eslint-disable-line react-hooks/exhaustive-deps
+
+  return (
+    <StateContext.Provider value={state}>
+      <DispatchContext.Provider value={dispatch}>
+        {children}
+      </DispatchContext.Provider>
+    </StateContext.Provider>
+  );
+}
+
+export async function checkTransactionStatus(
+  dispatch: Dispatch,
+  transaction: Transaction,
+  connection: Connection
+) {
+  const id = transaction.id;
+  dispatch({
+    status: Status.Checking,
+    id
+  });
+
+  let status;
+  try {
+    const signatureStatus = await connection.getSignatureStatus(
+      transaction.signature
+    );
+
+    if (signatureStatus === null) {
+      status = Status.Pending;
+    } else if ("Ok" in signatureStatus) {
+      status = Status.Success;
+    } else {
+      status = Status.Failure;
+    }
+  } catch (error) {
+    console.error("Failed to check transaction status", error);
+    status = Status.CheckFailed;
+  }
+  dispatch({ status, id });
+}
+
+export function useTransactions() {
+  const context = React.useContext(StateContext);
+  if (!context) {
+    throw new Error(
+      `useTransactions must be used within a TransactionsProvider`
+    );
+  }
+  return context;
+}
+
+export function useTransactionsDispatch() {
+  const context = React.useContext(DispatchContext);
+  if (!context) {
+    throw new Error(
+      `useTransactionsDispatch must be used within a TransactionsProvider`
+    );
+  }
+  return context;
+}

explorer/src/scss/_solana.scss

@@ -2,3 +2,10 @@
 // solana.scss
 // Use this to write your custom SCSS
 //
+
+code {
+  padding: 0.33rem;
+  border-radius: $border-radius;
+  background-color: $gray-200;
+  color: $black;
+}