dynamodb.js
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var AWS = require("aws-sdk");
var fs = require('fs');
AWS.config.update({
region: "ap-northeast-2"
});
var docClient = new AWS.DynamoDB.DocumentClient();
var pi_table = "pi_data";
var user_table = "user_data";
var dynamodb = new AWS.DynamoDB();
function get_last_weight(ras_id,cb){
params = {
TableName : pi_table,
ExpressionAttributeValues: {
":ras_id": {
S: ras_id
}
},
KeyConditionExpression : "ras_id = :ras_id",
"ScanIndexForward":false,
"Limit" : 1,
}
console.log(ras_id)
dynamodb.query(params, function(err, data) {
if (err) {
console.error("Unable to read item. Error JSON:", JSON.stringify(err, null, 2));
} else {
console.log(data.Items[0])
var last_weight = data.Items[0].weight.N
console.log("Last Weight : ",last_weight)
cb(last_weight)
}
});
}
module.exports = {
save_pi_data: function(pi_data,cb){
console.log(pi_data)
get_last_weight(pi_data.ras_id,function(last_weight){
console.log(last_weight)
var diff_weight = pi_data.weight - last_weight;
if(diff_weight < 0) diff_weight = 0;
var date = new Date(pi_data.date)
date = date.getTime().toString()
var params = {
TableName : pi_table,
Item : {
"ras_id" : pi_data.ras_id,
"save_date" : pi_data,
"weight" : Number(pi_data.weight),
"diff" : diff_weight
}
}
docClient.put(params, function(err, data) {
if (err) {
console.error("Unable to add item. Error JSON:", JSON.stringify(err, null, 2));
cb(false)
} else {
console.log("Added item:", params);
cb(true)
}
});
})
},
save_app_data: function(app_data,cb){
// var app_data = JSON.parse(app_data);
var params = {
TableName : user_table,
Item : {
"ras_id" : app_data.ras_id,
"user_id" : app_data.user_id
}
}
docClient.put(params, function(err, data) {
if (err) {
console.error("Unable to add item. Error JSON:", JSON.stringify(err, null, 2));
cb(false)
} else {
console.log("Added item:", params);
cb(true)
}
});
},
get_user_data: function(ras_id,cb){
// var params = {
// TableName : user_table,
// Key : {
// "user_id" : user_id
// }
// }
// console.log(user_id)
// docClient.get(params, function(err, data) {
// if (err) {
// console.error("Unable to read item. Error JSON:", JSON.stringify(err, null, 2));
// } else {
// console.log("GetItem succeeded:", data);
// console.log(data.Item)
// if(data.Item){
params = {
TableName : pi_table,
ExpressionAttributeValues: {
":ras_id": { S: ras_id }
},
KeyConditionExpression : "ras_id = :ras_id"
}
dynamodb.query(params, function(err, data) {
if (err) {
console.error("Unable to read item. Error JSON:", JSON.stringify(err, null, 2));
} else {
JSON.stringify(data, null, 2)
// console.log(data.Items)
cb(data.Items)
}
});
// }
// else{
// cb("No User")
// }
// }
// });
},
get_diff_data: function(user_info,cb){
console.log(user_info)
params = {
TableName : pi_table,
ExpressionAttributeValues: {
":ras_id": { S: user_info.ras_id},
":save_date" : {S : user_info.date}
},
KeyConditionExpression : "ras_id = :ras_id and save_date > :save_date",
}
dynamodb.query(params, function(err, data) {
if (err) {
console.error("Unable to read item. Error JSON:", JSON.stringify(err, null, 2));
} else {
JSON.stringify(data, null, 2)
console.log(data.Items)
cb(data.Items)
}
});
}
}