SPClient

0.3

helpers/Invoke-SPClientLoadQuery.ps1

                                #Requires -Version 3.0

# Invoke-SPClientLoadQuery.ps1

#

# Copyright (c) 2017 karamem0

# 

# Permission is hereby granted, free of charge, to any person obtaining a copy

# of this software and associated documentation files (the "Software"), to deal

# in the Software without restriction, including without limitation the rights

# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell

# copies of the Software, and to permit persons to whom the Software is

# furnished to do so, subject to the following conditions:

# 

# The above copyright notice and this permission notice shall be included in all

# copies or substantial portions of the Software.

# 

# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE

# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE

# SOFTWARE.

function Invoke-SPClientLoadQuery {

    [CmdletBinding()]

    param (

        [Parameter(Mandatory = $true)]

        [Microsoft.SharePoint.Client.ClientContext]

        $ClientContext = $SPClient.ClientContext,

        [Parameter(Mandatory = $true)]

        [Microsoft.SharePoint.Client.ClientObject]

        $ClientObject,

        [Parameter(Mandatory = $false)]

        [String]

        $Retrievals

    )

    process {

        $objType = $ClientObject.GetType()

        $funcType = [Type]'System.Func`2' | ForEach-Object { $_.MakeGenericType($objType, [Object]) }

        $exprType = [Type]'System.Linq.Expressions.Expression`1' | ForEach-Object { $_.MakeGenericType($funcType) }

        $listType = [Type]'System.Collections.Generic.List`1' | ForEach-Object { $_.MakeGenericType($exprType) }

        $exprList = New-Object $listType

        if (-not [String]::IsNullOrEmpty($Retrievals)) {

            if (Test-GenericSubclassOf -InputType $objType -TestType 'Microsoft.SharePoint.Client.ClientObjectCollection`1') {

                if ((-not $Retrievals.StartsWith('Include(')) -or

                    (-not $Retrievals.EndsWith(')'))) {

                    $Retrievals = 'Include(' + $Retrievals + ')'

                }

                $paramExpr = [System.Linq.Expressions.Expression]::Parameter($objType, $objType.Name)

                $propExpr = Convert-SPClientIncludeExpression -InputString $Retrievals -Expression $paramExpr

                $lambdaExpr = [System.Linq.Expressions.Expression]::Lambda($funcType, $propExpr, $paramExpr)

                $exprList.Add($lambdaExpr)

            } else {

                if (($Retrievals.StartsWith('Include(')) -and

                    ($Retrievals.EndsWith(')'))) {

                    $Retrievals = $Retrievals.Substring(8, $Retrievals.Length - 9)

                }

                $paramExpr = [System.Linq.Expressions.Expression]::Parameter($objType, $objType.Name)

                Split-SPClientExpressionString -InputString $Retrievals -Separator ',' | ForEach-Object {

                    $propExpr = Convert-SPClientMemberAccessExpression -InputString $_ -Expression $paramExpr

                    $castExpr = [System.Linq.Expressions.Expression]::Convert($propExpr, [Object])

                    $lambdaExpr = [System.Linq.Expressions.Expression]::Lambda($funcType, $castExpr, $paramExpr)

                    $exprList.Add($lambdaExpr)

                }

            }

        }

        $loadMethod = $ClientContext.GetType().GetMethod('Load').MakeGenericMethod($objType)

        $loadMethod.Invoke($ClientContext, @($ClientObject, $exprList.ToArray())) | Out-Null

        $ClientContext.ExecuteQuery()

    }

}