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melvinleemelvinlee
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refactor: refactor code for readability and clarity.
1 parent e0a5ee2 commit 30a54be

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2 files changed

+127
-121
lines changed

2 files changed

+127
-121
lines changed

‎todos/index.js‎

Lines changed: 17 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -1,9 +1,25 @@
11
const serverless = require("serverless-http");
22
const express = require("express");
3+
const bodyParser = require("body-parser");
34
const routes = require("./routes");
45

56
const app = express();
67

7-
app.use(routes);
8+
app.use(bodyParser.json({ strict: false }));
9+
10+
app.get("/", (req, res) => {
11+
res.json({ message: "Todo API" });
12+
});
13+
14+
app
15+
.route("/todos")
16+
.get(routes.listItem)
17+
.post(routes.createItem);
18+
19+
app
20+
.route("/todos/:id")
21+
.get(routes.getItem)
22+
.put(routes.editItem)
23+
.delete(routes.deleteItem);
824

925
module.exports.handler = serverless(app);

‎todos/routes.js‎

Lines changed: 110 additions & 120 deletions
Original file line numberDiff line numberDiff line change
@@ -1,138 +1,128 @@
1-
const express = require("express");
2-
const routes = express();
3-
const bodyParser = require("body-parser");
41
const AWS = require("aws-sdk");
52
const uuid = require("uuid");
63

7-
const router = express.Router();
8-
94
const dynamoDb = new AWS.DynamoDB.DocumentClient();
105

116
const tableParams = {
127
TableName: process.env.DYNAMODB_TABLE
138
};
149

15-
router
16-
.route("/todos")
17-
.get(function list(req, res) {
18-
dynamoDb.scan(tableParams, (error, result) => {
19-
if (error) {
20-
console.error(error);
21-
res
22-
.statusCode(error.statusCode || 501)
23-
.send({ error: "Couldn't fetch the todos." });
24-
} else {
25-
res.send(result.Items);
26-
}
27-
});
28-
})
29-
.post(function create(req, res) {
30-
const timestamp = new Date().getTime();
31-
const { text } = req.body;
32-
33-
if (typeof text !== "string") {
34-
res.status(400).send({ error: "Couldn't create todo item." });
10+
const listItem = (req, res) => {
11+
dynamoDb.scan(tableParams, (error, result) => {
12+
if (error) {
13+
console.error(error);
14+
res
15+
.statusCode(error.statusCode || 501)
16+
.send({ error: "Couldn't fetch the todos." });
17+
} else {
18+
res.send(result.Items);
19+
}
20+
});
21+
};
22+
23+
const createItem = (req, res) => {
24+
const timestamp = new Date().getTime();
25+
const { text } = req.body;
26+
27+
if (typeof text !== "string") {
28+
res.status(400).send({ error: "Couldn't create todo item." });
29+
}
30+
31+
const Item = {
32+
id: uuid.v1(),
33+
text: text,
34+
checked: false,
35+
createAt: timestamp,
36+
updateAt: timestamp
37+
};
38+
39+
const params = Object.assign({}, tableParams, { Item: Item });
40+
41+
dynamoDb.put(params, error => {
42+
if (error) {
43+
console.error(error);
44+
res.status(400).send("Couldn't create todo item.");
45+
} else {
46+
res.send(params);
47+
}
48+
});
49+
};
50+
51+
const getItem = (req, res) => {
52+
const params = Object.assign({}, tableParams, {
53+
Key: {
54+
id: req.params.id
55+
}
56+
});
57+
58+
dynamoDb.get(params, (error, result) => {
59+
if (error) {
60+
console.error(error);
61+
res.status(400).send({ error: "Could not get todo item" });
62+
}
63+
64+
if (result.Item) {
65+
res.json(result.Item);
66+
} else {
67+
res.status(400).send({ error: "Item not found" });
3568
}
69+
});
70+
};
3671

37-
const Item = {
38-
id: uuid.v1(),
39-
text: text,
40-
checked: false,
41-
createAt: timestamp,
42-
updateAt: timestamp
43-
};
44-
45-
const params = Object.assign({}, tableParams, { Item: Item });
46-
47-
dynamoDb.put(params, error => {
48-
if (error) {
49-
console.error(error);
50-
res.status(400).send("Couldn't create todo item.");
51-
} else {
52-
res.send(params);
53-
}
54-
});
72+
const editItem = (req, res) => {
73+
const timestamp = new Date().getTime();
74+
const { text, checked } = req.body;
75+
76+
// validation
77+
if (typeof text !== "string" || typeof checked !== "boolean") {
78+
console.error("Validation failed");
79+
res.status(400).send({ error: "Validation failed" });
80+
}
81+
82+
const params = Object.assign({}, tableParams, {
83+
Key: {
84+
id: req.params.id
85+
},
86+
ExpressionAttributeNames: {
87+
"#todo_text": "text"
88+
},
89+
ExpressionAttributeValues: {
90+
":text": text,
91+
":checked": checked,
92+
":updatedAt": timestamp
93+
},
94+
UpdateExpression:
95+
"SET #todo_text = :text, checked = :checked, updatedAt = :updatedAt",
96+
ReturnValues: "ALL_NEW"
5597
});
5698

57-
router
58-
.route("/todos/:id")
59-
.get(function get(req, res) {
60-
const params = Object.assign({}, tableParams, {
61-
Key: {
62-
id: req.params.id
63-
}
64-
});
65-
66-
dynamoDb.get(params, (error, result) => {
67-
if (error) {
68-
console.error(error);
69-
res.status(400).send({ error: "Could not get todo item" });
70-
}
71-
72-
if (result.Item) {
73-
res.json(result.Item);
74-
} else {
75-
res.status(400).send({ error: "Item not found" });
76-
}
77-
});
78-
})
79-
.put(function update(req, res) {
80-
const timestamp = new Date().getTime();
81-
const { text, checked } = req.body;
82-
83-
// validation
84-
if (typeof text !== "string" || typeof checked !== "boolean") {
85-
console.error("Validation failed");
86-
res.status(400).send({ error: "Validation failed" });
99+
dynamoDb.update(params, (error, result) => {
100+
if (error) {
101+
console.error(error);
102+
res
103+
.status(error.statusCoee || 501)
104+
.send({ error: "Could not update todo item" });
105+
} else {
106+
res.send(result.Attributes);
87107
}
108+
});
109+
};
88110

89-
const params = Object.assign({}, tableParams, {
90-
Key: {
91-
id: req.params.id
92-
},
93-
ExpressionAttributeNames: {
94-
"#todo_text": "text"
95-
},
96-
ExpressionAttributeValues: {
97-
":text": text,
98-
":checked": checked,
99-
":updatedAt": timestamp
100-
},
101-
UpdateExpression:
102-
"SET #todo_text = :text, checked = :checked, updatedAt = :updatedAt",
103-
ReturnValues: "ALL_NEW"
104-
});
105-
106-
dynamoDb.update(params, (error, result) => {
107-
if (error) {
108-
console.error(error);
109-
res
110-
.status(error.statusCoee || 501)
111-
.send({ error: "Could not update todo item" });
112-
} else {
113-
res.send(result.Attributes);
114-
}
115-
});
116-
})
117-
.delete((req, res) => {
118-
console.log(new Date().getTime());
119-
const params = Object.assign({}, tableParams, {
120-
Key: {
121-
id: req.params.id
122-
}
123-
});
124-
125-
dynamoDb.delete(params, error => {
126-
if (error) {
127-
console.error(error);
128-
res.status(501).send({ error: "Could not delete toto item" });
129-
} else {
130-
res.status(204).send();
131-
}
132-
});
111+
const deleteItem = (req, res) => {
112+
const params = Object.assign({}, tableParams, {
113+
Key: {
114+
id: req.params.id
115+
}
133116
});
134117

135-
routes.use(bodyParser.json({ strict: false }));
136-
routes.use(router);
118+
dynamoDb.delete(params, error => {
119+
if (error) {
120+
console.error(error);
121+
res.status(501).send({ error: "Could not delete toto item" });
122+
} else {
123+
res.status(204).send();
124+
}
125+
});
126+
};
137127

138-
module.exports = routes;
128+
module.exports = { listItem, createItem, getItem, editItem, deleteItem };

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