Definition of query language

query-language.ts

type Query = {
  search?: string,
  filter_group: FilterGroup,
  pagination: Pagination,
  sort: Sort
}

type FilterGroup = {
  conditional: Conditional,
  expressions: Array<Filter | FilterGroup>
}

enum Conditional {
  And = "and",
  Or = "or"
}

type Filter = {
  property: string,
  operator: Operator,
  values: Array<string | number | boolean>
}

enum Operator  {
  Eq = "equal",
  NotEq = "not_equal",
  Lte = "lte",
  Lt = "lt" ,
  Gt = "gt",
  Gte = "gte",
  Exist = "exist",
  NotExist = "not_exist",
  In = "in",
  NotIn = "not_in"
}

type Sort = {
  property: string,
  direction: Direction
}

enum Direction {
  Asc = "asc",
  Desc = "desc"
}

type Pagination = {
  page: number,
  perPage: number
}