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backendApi.js
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backendApi.js
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var request = require('request');
// var API_URL = "https://api.us.apiconnect.ibmcloud.com/spbodieusibmcom-kenishia/sb/";
function getPatientInfo(url, patientID) {
return new Promise(function(resolve, reject) {
request(url + "getInfo/patients/" + patientID, function (error, response, body) {
if (!error && response.statusCode == 200) {
body = JSON.parse(body);
var patientInfo = {
name: body["HCCMAREA"]["CA_PATIENT_REQUEST"]["CA_FIRST_NAME"] + " " + body["HCCMAREA"]["CA_PATIENT_REQUEST"]["CA_LAST_NAME"],
age: getAge(body["HCCMAREA"]["CA_PATIENT_REQUEST"]["CA_DOB"]),
street: body["HCCMAREA"]["CA_PATIENT_REQUEST"]["CA_ADDRESS"],
city: body["HCCMAREA"]["CA_PATIENT_REQUEST"]["CA_CITY"],
zipcode: body["HCCMAREA"]["CA_PATIENT_REQUEST"]["CA_POSTCODE"]
};
return resolve(patientInfo);
} else {
return resolve({});
}
});
})
}
function getPatientMedications(url, patientID) {
return new Promise(function(resolve, reject) {
request(url + "getInfo/prescription/" + patientID, function (error, response, body) {
var medications = [];
if (!error && response.statusCode == 200) {
body = JSON.parse(body);
try {
var medicationData = body["GETMEDO"]["CA_LIST_MEDICATION_REQUEST"]["CA_MEDICATIONS"];
} catch(e) {
return resolve(medications);
}
for (var i = 0, len = medicationData.length; i < len; i++) {
if (medications.indexOf(medicationData[i]["CA_DRUG_NAME"]) === -1) {
medications.push(medicationData[i]["CA_DRUG_NAME"]);
}
}
return resolve(medications);
} else {
return resolve(medications);
}
});
})
}
function getPatientAppointments(url, patientID) {
return new Promise(function(resolve, reject) {
request(url + "appointments/list/" + patientID, function (error, response, body) {
var appointments = [];
if (!error && response.statusCode == 200) {
body = JSON.parse(body);
var appointmentsData = body["ResultSet Output"]
for (var i = 0, len = appointmentsData.length; i < len; i++) {
appointments.push(appointmentsData[i]["APPT_DATE"].trim() + " " + appointmentsData[i]["APPT_TIME"].trim().replace(".",":").substring(0,5) + " - " + appointmentsData[i]["MED_FIELD"].trim());
}
return resolve(appointments);
} else {
return resolve(appointments);
}
});
})
}
function getPatientMeasurements(url, patientID) {
return new Promise(function(resolve, reject) {
request(url + "listObs/" + patientID, function (error, response, body) {
var measurements = {};
if (!error && response.statusCode == 200) {
body = JSON.parse(body);
var measurementsData = body["ResultSet Output"]
for (var i = 0, len = measurementsData.length; i < len; i++) {
switch(measurementsData[i][["DESCRIPTION"]]) {
case "Tobacco smoking status NHIS":
if (!measurements.smokerstatus) {
measurements.smokerstatus = measurementsData[i]["CHARACTERVALUE"];
}
break;
case "Body Height":
if (!measurements.height) {
measurements.height = measurementsData[i]["NUMERICVALUE"]/100;
}
break;
case "Body Weight":
if (!measurements.weight) {
measurements.weight = measurementsData[i]["NUMERICVALUE"];
}
break;
case "Body Mass Index":
if (!measurements.bmi) {
measurements.bmi = measurementsData[i]["NUMERICVALUE"];
if (measurements.bmi < 18.5) {
measurements.bmirange = "underweight";
} else if (measurements.bmi <= 24.9) {
measurements.bmirange = "normal";
} else if (measurements.bmi <= 29.9) {
measurements.bmirange = "overweight";
} else {
measurements.bmirange = "obese";
}
}
break;
case "Systolic Blood Pressure":
if (!measurements.sys) {
measurements.sys = measurementsData[i]["NUMERICVALUE"];
}
break;
case "Diastolic Blood Pressure":
if (!measurements.dia) {
measurements.dia = measurementsData[i]["NUMERICVALUE"];
}
break;
}
}
return resolve(measurements);
} else {
return resolve(measurements);
}
});
})
}
function patientLogin(url, username, password) {
return new Promise(function(resolve, reject) {
request.post({url: url + "login/user", json: {"UID":username,"PASS":password}}, function (error, response, body) {
if (!error && response.statusCode == 200) {
if (body["ResultSet Output"].length > 0) {
resolve(body["ResultSet Output"][0]["PATIENTID"]);
} else {
resolve(undefined);
}
} else {
return resolve(undefined);
}
});
})
}
function getAge(dateString)
{
var today = new Date();
var birthDate = new Date(dateString);
var age = today.getFullYear() - birthDate.getFullYear();
var month = today.getMonth() - birthDate.getMonth();
if (month < 0 || (month === 0 && today.getDate() < birthDate.getDate())) {
age--;
}
return age;
}
module.exports.getPatientInfo = getPatientInfo;
module.exports.getPatientMedications = getPatientMedications;
module.exports.getPatientAppointments = getPatientAppointments;
module.exports.getPatientMeasurements = getPatientMeasurements;
module.exports.patientLogin = patientLogin;