merged stuff in

step07/src/App.tsx

@@ -0,0 +1,78 @@
+import React from "react";
+import { TodoFooter } from "./components/TodoFooter";
+import { TodoHeader } from "./components/TodoHeader";
+import { TodoList } from "./components/TodoList";
+
+export class TodoApp extends React.Component<any, any> {
+  constructor(props) {
+    super(props);
+    this.state = {
+      inputValue: "",
+      todos: [],
+      filter: "all"
+    };
+  }
+  render() {
+    const { filter, todos, inputValue } = this.state;
+    return (
+      <div>
+        <TodoHeader
+          onInputChange={this._updateInput}
+          inputValue={inputValue}
+          onTodoSubmit={this._addTodo}
+          onFilterClick={this._updateFilter}
+          filter={filter}
+        />
+        <TodoList onTodoToggle={this._toggleTodoComplete} todos={todos} filter={filter} />
+        <TodoFooter onClearClick={this._removeCompletedTodos} todos={todos} />
+      </div>
+    );
+  }
+
+  _addTodo = () => {
+    const { todos, inputValue } = this.state;
+    const id = todos[0] ? todos[0].id + 1 : 0;
+    const newTodos = [
+      {
+        id: id,
+        key: id,
+        text: inputValue
+      },
+      ...todos
+    ];
+
+    this.setState({
+      todos: newTodos,
+      inputValue: ""
+    });
+  };
+
+  _toggleTodoComplete = (id) => {
+    this.setState({
+      todos: this.state.todos.map(todo => {
+        if (todo.id == id) {todo.completed = !todo.completed}
+        return todo;
+      })
+    })
+  }
+
+  _removeCompletedTodos = () => {
+    this.setState({
+      todos: this.state.todos.filter(todo => {
+        return !todo.completed;
+      })
+    })
+  }
+
+  _updateFilter = (filter) => {
+    this.setState({
+      filter: filter
+    })
+  };
+
+  _updateInput = ev => {
+    this.setState({
+      inputValue: ev.target.value
+    });
+  };
+}