# All files / utils orderBy.ts

78.12% Statements 75/96
49.31% Branches 36/73
73.33% Functions 11/15
78.94% Lines 75/95

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     import {get} from './get'
    import {isLength} from './isLength'
    import {isSymbol} from './isSymbol'
    import {isString} from './isString'

    const baseSortBy = (array, comparer) => {
      let {length} = array

      array.sort(comparer)
      while (length--) {
        array[length] = array[length].value
      }
      return array
    }

    const identity = value => value

    const compareAscending = (value, other) => {
      if (value !== other) {
        const valIsDefined = value !== undefined
        const valIsNull = value === null
        const valIsReflexive = value === value
        const valIsSymbol = isSymbol(value)

        const othIsDefined = other !== undefined
        const othIsNull = other === null
        const othIsReflexive = other === other
        const othIsSymbol = isSymbol(other)

        const val =
          typeof value === 'string' ? value.localeCompare(other) : value - other

        if (
          (!othIsNull && !othIsSymbol && !valIsSymbol && val > 0) ||
          (valIsSymbol &&
            othIsDefined &&
            othIsReflexive &&
            !othIsNull &&
            !othIsSymbol) ||
          (valIsNull && othIsDefined && othIsReflexive) ||
          (!valIsDefined && othIsReflexive) ||
          !valIsReflexive
        ) {
          return 1
        }
        if (
          (!valIsNull && !valIsSymbol && !othIsSymbol && val < 0) ||
          (othIsSymbol &&
            valIsDefined &&
            valIsReflexive &&
            !valIsNull &&
            !valIsSymbol) ||
          (othIsNull && valIsDefined && valIsReflexive) ||
          (!othIsDefined && valIsReflexive) ||
          !othIsReflexive
        ) {
          return -1
        }
      }
      return 0
    }

    const compareMultiple = (object, other, orders) => {
      let index = -1
      const objCriteria = object.criteria
      const othCriteria = other.criteria
      const length = objCriteria.length
      const ordersLength = orders.length

      while (++index < length) {
        const order = index < ordersLength ? orders[index] : null
        const cmpFn =
          order && typeof order === 'function' ? order : compareAscending
        const result = cmpFn(objCriteria[index], othCriteria[index])
        if (result) {
          if (order && typeof order !== 'function') {
            return result * (order == 'desc' ? -1 : 1)
          }
          return result
        }
      }
      return object.index - other.index
    }

    const isArrayLike = value => {
      return value != null && typeof value !== 'function' && isLength(value.length)
    }

    const baseFor = (object, iteratee, keysFunc) => {
      const iterable = Object(object)
      const props = keysFunc(object)
      let {length} = props
      let index = -1

      while (length--) {
        const key = props[++index]
        Iif (iteratee(iterable[key], key, iterable) === false) {
          break
        }
      }
      return object
    }

    const baseForOwn = (object, iteratee) => {
      return object && baseFor(object, iteratee, Object.keys)
    }

    const baseEach = (collection, iteratee) => {
      Iif (collection == null) {
        return collection
      }
      Iif (!isArrayLike(collection)) {
        return baseForOwn(collection, iteratee)
      }
      const length = collection.length
      const iterable = Object(collection)
      let index = -1

      while (++index < length) {
        Iif (iteratee(iterable[index], index, iterable) === false) {
          break
        }
      }
      return collection
    }

    const baseOrderBy = (collection, iteratees, orders) => {
      if (iteratees.length) {
        iteratees = iteratees.map(iteratee => {
          Iif (Array.isArray(iteratee)) {
            return value =>
              get(value, iteratee.length === 1 ? iteratee[0] : iteratee)
          }

          return iteratee
        })
      } else E{
        iteratees = [identity]
      }

      let criteriaIndex = -1
      let eachIndex = -1

      const result = Array.isArray(collection) ? new Array(collection.length) : []

      baseEach(collection, value => {
        const criteria = iteratees.map(iteratee => {
          if (isString(iteratee)) {
            return typeof value === 'function' ? value(iteratee) : value[iteratee]
          }
          return iteratee(value)
        })

        result[++eachIndex] = {
          criteria,
          index: ++criteriaIndex,
          value,
        }
      })

      return baseSortBy(result, (object, other) =>
        compareMultiple(object, other, orders)
      )
    }

    type OrderByIteratees =
      | Function
      | Array<string>
      | Array<Function>
      | Array<Array<string>>
      | Array<object>

    export const orderBy = <X>(
      collection: Array<X> | object,
      iteratees: OrderByIteratees,
      orders: Array<string>
    ): Array<X> => {
      Iif (collection == null) {
        return []
      }
      if (!Array.isArray(iteratees)) {
        iteratees = iteratees == null ? [] : [iteratees]
      }
      Iif (!Array.isArray(orders)) {
        orders = orders == null ? [] : [orders]
      }
      return baseOrderBy(collection, iteratees, orders)
    }