src/cmdlets/Connect-GraphApi.ps1

# Copyright 2019, Adam Edwards
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

. (import-script ../client/GraphConnection)
. (import-script ../client/GraphContext)
. (import-script ../client/LogicalGraphManager)
. (import-script New-GraphConnection)
. (import-script common/DynamicParamHelper)
. (import-script ../common/ScopeHelper)
. (import-script common/PermissionParameterCompleter)

function Connect-GraphApi {
    [cmdletbinding(positionalbinding=$false, defaultparametersetname='msgraph')]
    param(
        [parameter(parametersetname='msgraph', position=0)]
        [parameter(parametersetname='cloud', position=0)]
        [parameter(parametersetname='customendpoint', position=0)]
        [parameter(parametersetname='cert', position=0)]
        [parameter(parametersetname='certpath', position=0)]
        [parameter(parametersetname='autocert', position=0)]
        [parameter(parametersetname='secret', position=0)]
        [String[]] $Permissions = $null,

        [parameter(parametersetname='cloud')]
        [parameter(parametersetname='msgraph')]
        [parameter(parametersetname='cert')]
        [parameter(parametersetname='certpath')]
        [parameter(parametersetname='secret')]
        [parameter(parametersetname='customendpoint')]
        [parameter(parametersetname='autocert')]
        [string] $AppId = $null,

        [parameter(parametersetname='msgraph')]
        [parameter(parametersetname='secret')]
        [parameter(parametersetname='cert')]
        [parameter(parametersetname='certpath')]
        [parameter(parametersetname='autocert')]
        [Switch] $NoninteractiveAppOnlyAuth,

        [string] $TenantId,

        [parameter(parametersetname='certpath', mandatory=$true)]
        [parameter(parametersetname='customendpoint')]
        [string] $CertificatePath,

        [parameter(parametersetname='cert', mandatory=$true)]
        [parameter(parametersetname='customendpoint')]
        [System.Security.Cryptography.X509Certificates.X509Certificate2] $Certificate = $null,

        [switch] $Confidential,

        [parameter(parametersetname='secret', mandatory=$true)]
        [parameter(parametersetname='customendpoint')]
        [Switch] $Secret,

        [parameter(parametersetname='secret', mandatory=$true)]
        [parameter(parametersetname='customendpoint')]
        [SecureString] $Password,

        [parameter(parametersetname='msgraph')]
        [parameter(parametersetname='cloud', mandatory=$true)]
        [parameter(parametersetname='cert')]
        [parameter(parametersetname='certpath')]
        [parameter(parametersetname='secret')]
        [parameter(parametersetname='autocert')]
        [validateset("Public", "ChinaCloud", "GermanyCloud", "USGovernmentCloud")]
        [string] $Cloud = $null,

        [alias('ReplyUrl')]
        [Uri] $AppRedirectUri,

        [Switch] $NoBrowserSigninUI,

        [parameter(parametersetname='customendpoint', mandatory=$true)]
        [parameter(parametersetname='secret')]
        [parameter(parametersetname='cert')]
        [parameter(parametersetname='certpath')]
        [Uri] $GraphEndpointUri = $null,

        [parameter(parametersetname='customendpoint', mandatory=$true)]
        [parameter(parametersetname='secret')]
        [parameter(parametersetname='cert')]
        [parameter(parametersetname='certpath')]
        [Uri] $AuthenticationEndpointUri = $null,

        [parameter(parametersetname='customendpoint')]
        [parameter(parametersetname='secret')]
        [parameter(parametersetname='cert')]
        [parameter(parametersetname='certpath')]
        [Uri] $GraphResourceUri = $null,

        [parameter(parametersetname='msgraph')]
        [parameter(parametersetname='secret')]
        [parameter(parametersetname='cert')]
        [parameter(parametersetname='certpath')]
        [parameter(parametersetname='customendpoint')]
        [ValidateSet('v1', 'v2', 'Default')]
        [String] $AuthProtocol = 'Default',

        [parameter(parametersetname='aadgraph', mandatory=$true)]
        [parameter(parametersetname='customendpoint')]
        [switch] $AADGraph,

        [string] $UserAgent = $null,

        [parameter(parametersetname='reconnect', mandatory=$true)]
        [Switch] $Reconnect,

        [parameter(parametersetname='existingconnection',mandatory=$true)]
        [PSCustomObject] $Connection = $null
    )

    begin {
    }

    process {
        Enable-ScriptClassVerbosePreference

        $validatedCloud = if ( $Cloud ) {
            [GraphCloud] $Cloud
        } else {
            ([GraphCloud]::Public)
        }

        $computedScopes = if ( $Permissions -ne $null ) {
            $Permissions
        } else {
            @('User.Read')
        }

        $context = $::.GraphContext |=> GetCurrent

        if ( ! $context ) {
            throw "No current session -- unable to connect it to Graph"
        }

        $connectionResult = if ( $Connection ) {
            write-verbose "Explicit connection was specified"

            $newContext = $::.LogicalGraphManager |=> Get |=> NewContext $context $Connection

            $::.GraphContext |=> SetCurrentByName $newContext.name

            $Connection
        } else {
            write-verbose "Connecting context '$($context.name)'"
            $applicationId = if ( $AppId ) {
            [Guid] $AppId
            } else {
                $::.Application.DefaultAppId
            }

            $newConnection = if ( $Reconnect.IsPresent ) {
                write-verbose 'Reconnecting using the existing connection if it exists'
                if ( $Permissions -and $context.connection -and $context.connection.identity ) {
                    write-verbose 'Creating connection from existing connection but with new permissions'
                    $identity = new-so GraphIdentity $context.connection.identity.app $context.connection.graphEndpoint $context.connection.identity.tenantname
                    new-so GraphConnection $context.connection.graphEndpoint $identity $computedScopes $NoBrowserSigninUI.IsPresent
                } else {
                    write-verbose 'Just reconnecting the existing connection'
                    $context.connection
                }
            } else {
                write-verbose 'No reconnect -- creating a new connection for this context'

                $conditionalArguments = @{}

                $PSBoundParameters.keys | where { $_ -notin @('Connect', 'Reconnect', 'ErrorAction') } | foreach {
                    $conditionalArguments[$_] = $PSBoundParameters[$_]
                }

                try {
                    new-graphconnection @conditionalArguments -erroraction stop
                } catch {
                    throw
                }
            }

            $context |=> UpdateConnection $newConnection
            $newConnection
        }

        $::.GraphConnection |=> ToConnectionInfo $connectionResult
    }
}

$::.ParameterCompleter |=> RegisterParameterCompleter Connect-GraphApi Permissions (new-so PermissionParameterCompleter ([PermissionCompletionType]::DelegatedPermission))