Error Handling Module

Common module to create error response object at server side

List of all constant error codes

* Sequelize error code series starts from 1001
* Cassandra error code series starts from 2001
* Unknown error code series starts from 3001
* Business logic error code series starts from 5001
* Internal error code series starts from 7001


###### 1) constants.SUCCESS
###### 2) constants.CREATED
###### 3) constants.SEQUELIZE_DATABASE_ERROR
###### 4) constants.SEQUELIZE_VALIDATION_ERROR
###### 5) constants.CASSANDRA_DATABASE_ERROR
###### 6) constants.CASSANDRA_VALIDATION_ERROR
###### 7) constants.UNDEFINED_DATABASE_ERROR
###### 8) constants.UNDEFINED_ERROR
###### 9) constants.USER_DUPLICATION_ERROR
###### 10) constants.INVALID_JSON_OBJECT
###### 11) constants.USER_NOT_FOUND
###### 12) constants.COMPARE_PASSWORD_ERROR
###### 13) constants.PASSWORD_NOT_MATCH
###### 14) constants.VALID_CREDENTIALS
###### 15) constants.EMAIL_ALREADY_EXIST
###### 16) constants.INVALID_QUERY_PARAMETERS
###### 17) constants.ERROR_OCCURED_IN_GETTING_USER_LIST
###### 18) constants.UPDATE_DATA_ERROR
###### 19) constants.DELETE_DATA_ERROR
###### 20) constants.KEY_ALREADY_USED
###### 21) constants.ERROR_OCCURED_IN_GETTING_MASTER_LIST
###### 22) constants.SEQUELIZE_FOREIGN_KEY_CONSTRAINT_ERROR
###### 23) constants.ERROR_OCCURED_IN_GETTING_ECG_DATA

Sample response

###### 1) Success Response
``json
{
"code": "SS-200",
"message": "Success",
"data": [
{
"id": "204adf30-f444-11e6-bf17-574185f61676",
"account": 1,
"ticket_id": null,
"timestamp": "1486665020",
"sensor_uuid": "1234",
"ecgdata_status": null,
"ticket_number": null,
"patient_id": null
}
]
}
`

###### 2) Error Response
`json
{
"code": "US-1002",
"message": "Sequelize validation failed",
"error": {
"name": "SequelizeValidationError",
"message": "notNull Violation: first_name cannot be null",
"errors": [
{
"message": "first_name cannot be null",
"type": "notNull Violation",
"path": "first_name",
"value": null
}
]
}
}
``

Commands to pubish npm module

###### 1) Login-
npm login
###### 3) Publish npm module-
npm publish
###### 4) Update existing npm module with new version-
npm version [patch/minor/major]
npm publish
###### 5) Update readme file for npm module-
npm publish --update-readme
###### 5) Update package.json of app with new version-
npm update --save