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import { SQLite } from 'expo';
class TodoManager {
constructor() {
this.db = SQLite.openDatabase('todoDB4');
this.db.transaction((tx) => {
const sql = "create table 'main'.'todo' ('id' integer not null primary key autoincrement,'name' text,'content' text,'finish' integer)";
tx.executeSql(sql, null, (tx, result) => {
console.log('====================================');
console.log('创建表成功');
console.log('====================================');
}, (tx, error) => {
console.log('====================================');
console.log('创建表失败' + error);
console.log('====================================');
});
});
}
setListener(listener) {
this.listener = listener;
}
setFinishListener(listener) {
this.finishListener = listener;
}
getTodoInfo(callBack) {
console.log('====================================');
console.log('bbbbb');
console.log('====================================');
this.db.transaction((tx) => {
const sql = 'select * from todo';
tx.executeSql(sql, null, (tx, result) => {
const todos = result.rows._array;
console.log('=============todostodos=======================');
console.log(todos);
console.log('====================================');
//监听选中与否的变量变化
let selectCount = 0;
todos.map((value) => {
if (value.finish == 1) {
selectCount++;
}
});
//巧妙思路的变化
if (callBack) {
callBack(todos);
}
if (this.listener) {
console.log('====================================');
console.log('this.listener');
console.log('====================================');
this.listener(todos);
}
//回传过去
this.finishListener(selectCount);
}, (tx, error) => {
console.log('====================================');
console.log('查询失败' + error);
console.log('====================================');
//巧妙思路的变化
if (callBack) {
callBack([]);
}
if (this.listener) {
this.listener([]);
}
});
});
}
addTodoInfo(info, callBack) {
this.db.transaction((tx) => {
const sql = `insert into todo(name,content,finish) values('${info.name}','${info.content}',0)`;
tx.executeSql(sql, null, (tx, result) => {
console.log('====================================');
console.log('添加成功');
console.log('====================================');
this.getTodoInfo();
if (callBack) {
callBack(true);
}
}, (tx, error) => {
console.log('====================================');
console.log('添加失败' + error);
console.log('====================================');
if (callBack) {
callBack(false);
}
});
});
}
delTodoInfo() {
// this.db.transaction((tx) => {
// const ids = info.id.join(',');
// const sql = `delete from todo where id in (${ids})`;
// tx.executeSql(sql, null, (tx, result) => {
// console.log('====================================');
// console.log('删除成功');
// console.log('====================================');
// if (callBack) {
// callBack(true);
// }
// this.getTodoInfo();
// }, (tx, error) => {
// console.log('====================================');
// console.log('删除失败' + error);
// console.log('====================================');
// if (callBack) {
// callBack(false);
// }
// });
// });
this.db.transaction((tx) => {
const sql = 'delete from todo where finish = 1';
tx.executeSql(sql, null, (tx, resultSet) => {
console.log('删除成功');
this.getTodoInfo();
})
})
}
//全选
selectAll() {
this.db.transaction((tx) => {
const sql = 'select * from todo';
tx.executeSql(sql, null, (tx, result) => {
const array = result.rows._array;
let length = array.length;
let slength = 0;
array.map((value, key) => {
if (value.finish == 1) {
slength++;
}
});
if (slength == length) {
//取消全选
const sql = 'update todo set finish=0';
tx.executeSql(sql, null, (tx, resultSet) => {
if (resultSet) {
this.getTodoInfo();
}
}, (tx, error) => {
console.log('====================================');
console.log('取消全选失败' + error);
console.log('====================================');
});
} else {
//全选
const sql = 'update todo set finish=1';
tx.executeSql(sql, null, (tx, resultSet) => {
if (resultSet) {
this.getTodoInfo();
}
}, (tx, error) => {
console.log('====================================');
console.log('全选失败' + error);
console.log('====================================');
});
}
}, (tx, error) => {
console.log('====================================');
console.log('全选失败' + error);
console.log('====================================');
});
});
}
//单选
singleSelect(id) {
//先根据传过来的id查询一下
this.db.transaction((tx) => {
const sql = `select * from todo where id=${id}`;
tx.executeSql(sql, null, (tx, resultSet) => {
//修改其状态
const todo = resultSet.rows._array[0];
const finish = todo.finish ? 0 : 1;//修改
const sql = `update todo set finish=${finish} where id=${id}`;
tx.executeSql(sql, null, (tx, resultSet) => {
console.log('==============aaaa======================');
console.log('aaaa');
console.log('====================================');
this.getTodoInfo();
})
}, (tx, error) => {
console.log('====================================');
console.log('单选失败' + error);
console.log('====================================');
});
});
}
}
export default new TodoManager();
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