Igthorn Request

Generic API request class that allows to validate query.

Igthorn Request provides two different features:

• request class to parse, validate and create API requests
• express middleware to parse and validate requests

It's part of Igthorn project.

Usage

Typical usage would be to add parsing request as middleware:

var express           = require("express");
var app               = express();
var RequestMiddleware = require("igthorn-request").RequestMiddleware;
app.all("*", RequestMiddleware.validate);

// after that middleware you can refer to parsed request in following way

get(request, response)
{
  let parsedRequest = request.getParsedRequest();

  // ...
}

Request can also be used as a standalone class:

var Request = require("igthorn-request");
var request = new Request();

request.inflate({
  conditions: {
    price: {
      "gt" : 15,
      "lte": 70
    },
    "category": [21, 45]
  }
});

Request query structure

Request class is capable of handling following params:

• fields List of fields to be retrieved

  "name"
  // or
  ["firstName", "lastName"]
  // or
  {
    "name" : "firstName"
  }

• without List of fields to be ignored when retrieving data

  "name"
  // or
  ["firstName", "lastName"]

• joins List of relations(referred by name) to be fetched in addition to data from main resource

  "comments"

• conditions Mongo-like structure allowing multi level nesting - see examples below

  {
    name: "John"
  }
  // or
  { // implicit logical and
    name: "John",
    surname: "Smith"
  }
  // or
  { // explicit logic and
    "and" : [
      {name: "John"}
      {surname: "Smith"}
    ]
  }
  // or
  {
    "or": [
      { // implicit logical and
        name: "John",
        surname: "Smith"
      },
      {
        "age" : 20
      }
    ]
  }
  // or
  { // different operators
    "age" : {
      "gt" : 20,
      "lt" : 25
    }
  }

| operator | meaning | | ---------- | ------------------------------------------------------------------------------------ | | "eq", | Matches values that are exactly the same as the value specified in the query. | | "gt", | Matches values that are greater than the value specified in the query. | | "gte", | Matches values that are greater than or equal to the value specified in the query. | | "lt", | Matches values that are less than the value specified in the query. | | "lte", | Matches values that are less than or equal to the value specified in the query. | | "ne", | Matches all values that are not equal to the value specified in the query. | | "in", | Matches values that do exist in an array specified to the query. | | "nin", | Matches values that do not exist in an array specified to the query. | | "regex", | Matches values using a regular expression on the specified query. | | "like", | Matches values that are matching pattern passed in the value specified in the query. | | "contains" | Matches one of values in passed key which needs to be array |

• order Allows to set ASC/DESC multi field order

  "name"
  // or
  [
    "name",
    "age"
  ]
  // or
  {
    "name": "desc",
    "age": "asc"
  }

• limit - limits number of retrieved resources - numeric value
• offset - specifies offset of skipped resources - numeric value
• storage - special storage name that allows API user to dictate where data should be stored/come from

Methods

Request class implements following methods:

• inflate(data:object) : self

  parses, validates and inflates request object with passed data object

• setFields(fields:string|array|object) : self

  sets fields to be queried

• setWithout(fields:string|array|object) : self

  sets fields to exclude from result

• getFields() : object

  gets list of fields to be queried

• getWithout() : object

  gets list to exclude from result

• setJoins(joins:string|array) : self

  sets list of relationships to be joined to resource, allows for either string or array

• getJoins() : array

  gets list of relationships to be joined to resource

• setConditions(data:object) : self

  parses, validates and sets passed conditions

• getConditions() : object

  gets conditions

• appendConditions(data:object) : self

  parses, validates and appends passed conditions to current conditions

• setOrder(order:string|array|object) : self

  parses, validates and sets order

• getOrder() : object

  gets order

• setLimit(limit:int) : self

  sets limit of resources to be returned

• getLimit() : number

  gets limit of resources to be returned

• disableLimit() : self

  disables limit

• setOffset(offset:int|string) : self

  sets offset

• getOffset() : int

  gets offset

• setStorage(storage:string) : self

  sets storage to be used

• getStorage() : string

  get storage to be used

• enableCount() : self

  enables count to be returned only for that query

• disableCount() : self

  disables count to be returned only for that query

• isCountEnabled() : boolean

  gets flag is count enabled

• getUsedFields() : array

  gets list of fields used acros query

• export() : object

  exports object representation of request

• reset() : self

  sets request object state to it's defaults

License

MIT