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General Functions

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Return JSON Endpoint Not Supported

general.endpointNotSupported

  • Return a template JSON specifiying that the Endpoint requested is not supported

    general.endpointNotSupported(
  (method = null),
  (key = 'message'),
  (message = 'This endpoint does not support this method requests')
);

  • Example

    general.endpointNotSupported('post', 'error', 'Endpoint not supported');
// returns
{
    method : 'post',
    // property key is called error because that's what was passed as second parameters, passing x will make the key called x
    error: 'Endpoint not supported'
}

general.constructResponse

  • Return a template JSON specifiying the status of an operation

    general.constructResponse(
  (success = true),
  (code = 200),
  (message = null),
  (body = null),
  (otherAttributes = null)
);

  • Example

    // some error object that came back from calling other service
const errorFromOtherService = {errorMessage: 'User Already Exist'}
// extra information we got from the responding service, and we want to pass it to our resopnse
const previousUserIdInThatService = 123;
// setting an object containing the extra information we want to pass with the error
const otherAttributesObj = {extraObj: {userId: perviousUserIdInThatService}, userName: 'Amjad992'}}

// the following function will be called in the catch block for examples and returned to the calling function to indicate the error occuring and its details
// notice that extraObj has to be an object in order to be shows e.g. {extraObj: {userId: 123}}
await general.constructResponse(false, 404, 'Can not add a new user', errorFromOtherService, otherAttributesObj);
// returns
{
    success: false,
    code: 404,
    message: 'Can not add a new user'
    body: {
        errorMessage: 'User Already Exist'
    }
    extraObj: {
        userId: 123
    },
    userName: 'Amjad992'
}

general.sleep

  • Halt the execution of the program for the amount specified in milliseconds

    general.sleep((milliseconds = 1000));

  • Example

    await general.sleep(3000);
// Stops execution for 3 seconds

general.hitInHouseEndpoint

  • Send a request to an endpoint in the current server

  • if the method is get, the body will be stringified before sending

    general.hitInHouseEndpoint((endpoint = ''), (method = 'get'), (body = {}));

  • Example

    await general.hitInHouseEndpoint(endpoint = '/user/add', method = 'post', body = {name: 'Amjad'});
// returns
{
    success: true,
    code: 200,
    message: 'Successfully hit the endpoint /user/add',
    // whatever is returned from the endpoint hit
    body: {
        userId: 123
        name: 'Amjad'
    }
}

general.hitURL

  • Send a request to an external url

  • if the method is get, the body will be stringified before sending

    general.hitURL(url, (method = 'get'), (body = {}));

  • Example

    await general.hitURL('https://example.com/user/add', method = 'post', body = {name: 'Amjad'});
// returns
{
    success: true,
    code: 200,
    message: 'Successfully hit https://example.com/user/add',
    // whatever is returned from the url hit
    body: {
        userId: 123
        name: 'Amjad'
    }
}

    general.performActionForSubArrays

  • Perform an action multiple times (just perform actions and doesn't return anything)

    general.performActionForSubArrays(
  action,
  array,
  (desiredLength = 1),
  (parameters = null),
  (sleepPeriodInMilliseconds = 1000)
);

  • Example

    await util.funcs.g.performActionForSubArrays((chunck, parameters) => {
    console.log(chunck[0])
    console.log(parameters.separator)
}, [1, 2, 3, 4], 1, {separator: '---'}, 1000);
// Prints the following output and each chunk will appear after a second of the previous
[ 1, 2 ]
---
[ 3, 4 ]
---

    general.performActionRepeatedly

  • Perform an action without blocking until the checking function used to check the response return true, or the maximum number of tries reached.

  • This will return whatever the response is in case of success (decided by checking function), or will return the final failure response in case of failure

  • This is a promise and can use with either await or .then()

    general.performActionRepeatedly(
  action,
  checkFunction,
  (attempts = 1),
  (parameters = null),
  (sleepPeriodInMilliseconds = 1000)
);

  • Example 1

    await util.funcs.g.performActionRepeatedly((parameters) => {
    console.log('Call API');
    const callResponse = someCalledFunctionOrAPI(parameters.valueNeeded);
    console.log(parameters.separator)
    // e.g. callResponse = {status: 'fail', message: 'some error message from the API'}
    return callResponse;
}, (response) => {
  if (response.status == 'success') return true;
  else return false
}, 3, {valueNeeded: 'some value', separator: '---'}, 1000);
// Prints the following output and each try will appear after a second of the previous
Call API
---
Call API
---
Call API
---
// Will also return the following since the call to API failed in the 3 times
{
  success: false,
  code: 400,
  message: 'Failed performing an action',
  body:{
    status: 'fail',
    message: 'some error message from the API'
  },
  attempts: 3
}

  • Example 2

    await util.funcs.g.performActionRepeatedly((parameters) => {
    console.log('Call API');
    const callResponse = someCalledFunctionOrAPI(parameters.valueNeeded);
    console.log(parameters.separator)
    // let's assume that on first attempt response was
    // call callResponse = {status: 'fail', message: 'some error message from the API'}
    // while on second attempt it was
    // e.g. callResponse = {status: 'success', message: 'some message'}
    return callResponse;
}, (response) => {
  if (response.status == 'success') return true;
  else return false
}, 3, {valueNeeded: 'some value', separator: '---'}, 1000);
// Prints the following output and each try will appear after a second of the previous
Call API
---
Call API
---
Call API
---
// Will also return the following since the call to API call successed after 2 attempts
{
  success: false,
  code: 200,
  message: 'Successfully performed action',
  body:{
    status: 'success',
    message: 'some message'
  },
  attempts: 2
}

    general.isArray

  • Check if the object is an array or not

    general.isArray(object);

  • Example

    await general.isArray([]);
// returns true

    general.isObject

  • Check if the object is an object or not

    general.isObject(object);

  • Example

    await general.isObject({});
// returns true

    general.isFunction

  • Check if the object is a function or not

    general.isFunction(object);

  • Example

    await general.isFunction(()=>{return true}));
// returns true

    general.isNumber

  • Check if the object is a number or not

    general.isNumber(object);

  • Example

    await general.isNumber(1);
// returns true

    general.isString

  • Check if the object is a string or not

    general.isString(object);

  • Example

    await general.isString('Hello');
// returns true

    general.isBoolean

  • Check if the object is a boolean or not

    general.isBoolean(object);

  • Example

    await general.isBoolean(true);
// returns true

    general.isEmptyArray

  • Check if the object is an empty array or not

    general.isEmptyArray(object);

  • Example

    await general.isEmptyArray([]);
// returns true

    general.isEmptyString

  • Check if the object is an empty string or not

    general.isArray(object);

  • Example

    await general.isArray('');
// returns true

    general.isEmptyObject

  • Check if the object is an empty object or not

    general.isEmptyObject(object);

  • Example

    await general.isEmptyObject({});
// returns true

///

general.generateString

  • Generate a string with variable parts inside it

    general.generateString(string, variables, values);

  • Example

    await general.generateString(
  'My Name is {firstName} {lastName}',
  ['firstName', 'lastName'],
  ['John', 'Doe']
);
// returns the string: 'My Name is John Doe'

general.filterJSONElementsByKeyValue

  • Filter the elements of a nested JSON object or array that includes a specific value for an element

    general.filterJSONElementsByKeyValue(object, key, value);

  • Example

    await general.filterJSONElementsByKeyValue(
  {
    emp1: {name: 'Amjad', position: 'Programmer'},
    emp2: {name: 'Sarah', position: 'Business Manager'},
    emp3: {name: 'Hussam', position: 'Programmer'},
  },
  'position',
  'Programmer'
);
// returns
{
  emp1: {name: 'Amjad', position: 'Programmer'},
  emp3: {name: 'Hussam', position: 'Programmer'},
}
    await general.filterJSONElementsByKeyValue(
  [
    {name: 'Amjad', position: 'Programmer'},
    {name: 'Sarah', position: 'Business Manager'},
    {name: 'Hussam', position: 'Programmer'},
  ],
  'position',
  'Programmer'
);
// returns
[
  {name: 'Amjad', position: 'Programmer'},
  {name: 'Hussam', position: 'Programmer'},
];

general.filterUniqueJSONElementsByKey

  • Filter the elements of a nested JSON object or array by the values of a specific key inside each element

    general.filterUniqueJSONElementsByKey(object, key);

  • Example

    await general.filterUniqueJSONElementsByKey(
  {
    emp1: {name: 'Amjad', position: 'Programmer'},
    emp2: {name: 'Sarah', position: 'Business Manager'},
    emp3: {name: 'Hussam', position: 'Programmer'},
  },
  'position'
);
// returns
{
  emp3: { name: 'Hussam', position: 'Programmer' },
  emp2: { name: 'Sarah', position: 'Business Manager' }
};
    await general.filterJSONElementsByKeyValue(
  [
    {name: 'Amjad', position: 'Programmer'},
    {name: 'Sarah', position: 'Business Manager'},
    {name: 'Hussam', position: 'Programmer'},
  ],
  'position'
);
// returns
[
  {name: 'Hussam', position: 'Programmer'},
  {name: 'Sarah', position: 'Business Manager'},
];