GitHubMilestones.ps1

# Copyright (c) Microsoft Corporation. All rights reserved.
# Licensed under the MIT License.

# For more information refer to"
#  https://github.community/t5/How-to-use-Git-and-GitHub/Milestone-quot-Due-On-quot-field-defaults-to-7-00-when-set-by-v3/m-p/6901
$script:minimumHoursToEnsureDesiredDateInPacificTime = 9

function Get-GitHubMilestone
{
<#
    .DESCRIPTION
        Get the milestones for a given Github repository.

        The Git repo for this module can be found here: http://aka.ms/PowerShellForGitHub

    .PARAMETER OwnerName
        Owner of the repository.
        If not supplied here, the DefaultOwnerName configuration property value will be used.

    .PARAMETER RepositoryName
        Name of the repository.
        If not supplied here, the DefaultRepositoryName configuration property value will be used.

    .PARAMETER Uri
        Uri for the repository.
        The OwnerName and RepositoryName will be extracted from here instead of needing to provide
        them individually.

    .PARAMETER Milestone
        The number of a specific milestone to get. If not supplied, will return back all milestones for this repository.

    .PARAMETER Sort
        How to sort the results.

    .PARAMETER Direction
        How to list the results. Ignored without the sort parameter.

    .PARAMETER State
        Only milestones with this state are returned.

    .PARAMETER AccessToken
        If provided, this will be used as the AccessToken for authentication with the
        REST Api.  Otherwise, will attempt to use the configured value or will run unauthenticated.

    .PARAMETER NoStatus
        If this switch is specified, long-running commands will run on the main thread
        with no commandline status update.  When not specified, those commands run in
        the background, enabling the command prompt to provide status information.
        If not supplied here, the DefaultNoStatus configuration property value will be used.

    .EXAMPLE
        Get-GitHubMilestone -OwnerName Microsoft -RepositoryName PowerShellForGitHub
        Get the milestones for the Microsoft\PowerShellForGitHub project.

    .EXAMPLE
        Get-GitHubMilestone -Uri 'https://github.com/PowerShell/PowerShellForGitHub' -Milestone 1
        Get milestone number 1 for the Microsoft\PowerShellForGitHub project.
#>
    [CmdletBinding(
        SupportsShouldProcess,
        DefaultParameterSetName='RepositoryElements')]
    [Diagnostics.CodeAnalysis.SuppressMessageAttribute("PSShouldProcess", "", Justification="Methods called within here make use of PSShouldProcess, and the switch is passed on to them inherently.")]
    param(
        [Parameter(Mandatory, ParameterSetName='MilestoneElements')]
        [Parameter(Mandatory, ParameterSetName='RepositoryElements')]
        [string] $OwnerName,

        [Parameter(Mandatory, ParameterSetName='MilestoneElements')]
        [Parameter(Mandatory, ParameterSetName='RepositoryElements')]
        [string] $RepositoryName,

        [Parameter(Mandatory, ParameterSetName='MilestoneUri')]
        [Parameter(Mandatory, ParameterSetName='RepositoryUri')]
        [string] $Uri,

        [Parameter(Mandatory, ParameterSetName='MilestoneUri')]
        [Parameter(Mandatory, ParameterSetName='MilestoneElements')]
        [int64] $Milestone,

        [Parameter(ParameterSetName='RepositoryUri')]
        [Parameter(ParameterSetName='RepositoryElements')]
        [ValidateSet('Open', 'Closed', 'All')]
        [string] $State,

        [Parameter(ParameterSetName='RepositoryUri')]
        [Parameter(ParameterSetName='RepositoryElements')]
        [ValidateSet('DueOn', 'Completeness')]
        [string] $Sort,

        [Parameter(ParameterSetName='RepositoryUri')]
        [Parameter(ParameterSetName='RepositoryElements')]
        [ValidateSet('Ascending', 'Descending')]
        [string] $Direction,

        [string] $AccessToken,

        [switch] $NoStatus
    )

    Write-InvocationLog

    $elements = Resolve-RepositoryElements
    $OwnerName = $elements.ownerName
    $RepositoryName = $elements.repositoryName
    $uriFragment = [String]::Empty
    $description = [String]::Empty

    $telemetryProperties = @{
        'OwnerName' = (Get-PiiSafeString -PlainText $OwnerName)
        'RepositoryName' = (Get-PiiSafeString -PlainText $RepositoryName)
        'ProvidedMilestone' = $PSBoundParameters.ContainsKey('Milestone')
    }

    if ($PSBoundParameters.ContainsKey('Milestone'))
    {
        $uriFragment = "repos/$OwnerName/$RepositoryName/milestones/$Milestone"
        $description = "Getting milestone $Milestone for $RepositoryName"
    }
    else
    {
        $getParams = @()

        if ($PSBoundParameters.ContainsKey('Sort'))
        {
            $sortConverter = @{
                'Completeness' = 'completeness'
                'DueOn' = 'due_on'
            }

            $getParams += "sort=$($sortConverter[$Sort])"
        }

        if ($PSBoundParameters.ContainsKey('Direction'))
        {
            $directionConverter = @{
                'Ascending' = 'asc'
                'Descending' = 'desc'
            }

            $getParams += "direction=$($directionConverter[$Direction])"
        }

        if ($PSBoundParameters.ContainsKey('State'))
        {
            $State = $State.ToLower()
            $getParams += "state=$State"
        }

        $uriFragment = "repos/$OwnerName/$RepositoryName/milestones`?" +  ($getParams -join '&')
        $description = "Getting milestones for $RepositoryName"
    }

    $params = @{
        'UriFragment' = $uriFragment
        'Description' = $description
        'AccessToken' = $AccessToken
        'TelemetryEventName' = $MyInvocation.MyCommand.Name
        'TelemetryProperties' = $telemetryProperties
        'NoStatus' = (Resolve-ParameterWithDefaultConfigurationValue -Name NoStatus -ConfigValueName DefaultNoStatus)
    }

    return Invoke-GHRestMethodMultipleResult @params
}

function New-GitHubMilestone
{
<#
    .DESCRIPTION
        Creates a new Github milestone for the given repository

        The Git repo for this module can be found here: http://aka.ms/PowerShellForGitHub

    .PARAMETER OwnerName
        Owner of the repository.
        If not supplied here, the DefaultOwnerName configuration property value will be used.

    .PARAMETER RepositoryName
        Name of the repository.
        If not supplied here, the DefaultRepositoryName configuration property value will be used.

    .PARAMETER Uri
        Uri for the repository.
        The OwnerName and RepositoryName will be extracted from here instead of needing to provide
        them individually.

    .PARAMETER Title
        The title of the milestone.

    .PARAMETER State
        The state of the milestone.

    .PARAMETER Description
        A description of the milestone.

    .PARAMETER DueOn
        The milestone due date.
        GitHub will drop any time provided with this value, therefore please ensure that the
        UTC version of this value has your desired date.

    .PARAMETER AccessToken
        If provided, this will be used as the AccessToken for authentication with the
        REST Api.  Otherwise, will attempt to use the configured value or will run unauthenticated.

    .PARAMETER NoStatus
        If this switch is specified, long-running commands will run on the main thread
        with no commandline status update.  When not specified, those commands run in
        the background, enabling the command prompt to provide status information.
        If not supplied here, the DefaultNoStatus configuration property value will be used.

    .EXAMPLE
        New-GitHubMilestone -OwnerName Microsoft -RepositoryName PowerShellForGitHub -Title "Testing this API"

        Creates a new Github milestone for the Microsoft\PowerShellForGitHub project.

    .NOTES
        For more information on how GitHub handles the dates specified in DueOn, please refer to
        this support forum post:
        https://github.community/t5/How-to-use-Git-and-GitHub/Milestone-quot-Due-On-quot-field-defaults-to-7-00-when-set-by-v3/m-p/6901

        Please note that due to artifacts of how GitHub was originally designed, all timestamps
        in the GitHub database are normalized to Pacific Time.  This means that any dates specified
        that occur before 7am UTC will be considered timestamps for the _previous_ day.

        Given that GitHub drops the _time_ aspect of this DateTime, this function will ensure that
        the requested DueOn date specified is honored by manipulating the time as needed.
#>
    [CmdletBinding(
        SupportsShouldProcess,
        DefaultParameterSetName='Elements')]
    [Diagnostics.CodeAnalysis.SuppressMessageAttribute("PSShouldProcess", "", Justification="Methods called within here make use of PSShouldProcess, and the switch is passed on to them inherently.")]
    param(
        [Parameter(Mandatory, ParameterSetName='Elements')]
        [string] $OwnerName,

        [Parameter(Mandatory, ParameterSetName='Elements')]
        [string] $RepositoryName,

        [Parameter(Mandatory, ParameterSetName='Uri')]
        [string] $Uri,

        [Parameter(Mandatory, ParameterSetName='Uri')]
        [Parameter(Mandatory, ParameterSetName='Elements')]
        [string] $Title,

        [ValidateSet('Open', 'Closed')]
        [string] $State,

        [string] $Description,

        [DateTime] $DueOn,

        [string] $AccessToken,

        [switch] $NoStatus
    )

    Write-InvocationLog

    $elements = Resolve-RepositoryElements
    $OwnerName = $elements.ownerName
    $RepositoryName = $elements.repositoryName

    $telemetryProperties = @{
        'OwnerName' = (Get-PiiSafeString -PlainText $OwnerName)
        'RepositoryName' = (Get-PiiSafeString -PlainText $RepositoryName)
        'Title' =  (Get-PiiSafeString -PlainText $Title)
    }

    $hashBody = @{
        'title' = $Title
    }

    if ($PSBoundParameters.ContainsKey('State'))
    {
        $State = $State.ToLower()
        $hashBody.add('state', $State)
    }

    if ($PSBoundParameters.ContainsKey('Description'))
    {
        $hashBody.add('description', $Description)
    }

    if ($PSBoundParameters.ContainsKey('DueOn'))
    {
        # If you set 'due_on' to be '2020-09-24T06:59:00Z', GitHub considers that to be '2020-09-23T07:00:00Z'
        # And if you set 'due_on' to be '2020-09-24T07:01:00Z', GitHub considers that to be '2020-09-24T07:00:00Z'
        # SO....we can't depend on the typical definition of midnight when trying to specify a specific day.
        # Instead, we'll use 9am on the designated date to ensure we're always dealing with the
        # same date that GitHub uses, regardless of the current state of Daylight Savings Time.
        # (See .NOTES for more info)
        $modifiedDueOn = $DueOn.ToUniversalTime().date.AddHours($script:minimumHoursToEnsureDesiredDateInPacificTime)
        $dueOnFormattedTime = $modifiedDueOn.ToString('o')
        $hashBody.add('due_on', $dueOnFormattedTime)
    }

    $params = @{
        'UriFragment' = "repos/$OwnerName/$RepositoryName/milestones"
        'Body' = (ConvertTo-Json -InputObject $hashBody)
        'Method' = 'Post'
        'Description' =  "Creating milestone for $RepositoryName"
        'AccessToken' = $AccessToken
        'TelemetryEventName' = $MyInvocation.MyCommand.Name
        'TelemetryProperties' = $telemetryProperties
        'NoStatus' = (Resolve-ParameterWithDefaultConfigurationValue -Name NoStatus -ConfigValueName DefaultNoStatus)
    }

    return Invoke-GHRestMethod @params
}

function Set-GitHubMilestone
{
<#
    .DESCRIPTION
        Update an existing milestone for the given repository

        The Git repo for this module can be found here: http://aka.ms/PowerShellForGitHub

    .PARAMETER OwnerName
        Owner of the repository.
        If not supplied here, the DefaultOwnerName configuration property value will be used.

    .PARAMETER RepositoryName
        Name of the repository.
        If not supplied here, the DefaultRepositoryName configuration property value will be used.

    .PARAMETER Uri
        Uri for the repository.
        The OwnerName and RepositoryName will be extracted from here instead of needing to provide
        them individually.

    .PARAMETER Milestone
        The number of a specific milestone to get.

    .PARAMETER Title
        The title of the milestone.

    .PARAMETER State
        The state of the milestone.

    .PARAMETER Description
        A description of the milestone.

    .PARAMETER DueOn
        The milestone due date.
        GitHub will drop any time provided with this value, therefore please ensure that the
        UTC version of this value has your desired date.

    .PARAMETER AccessToken
        If provided, this will be used as the AccessToken for authentication with the
        REST Api.  Otherwise, will attempt to use the configured value or will run unauthenticated.

    .PARAMETER NoStatus
        If this switch is specified, long-running commands will run on the main thread
        with no commandline status update.  When not specified, those commands run in
        the background, enabling the command prompt to provide status information.
        If not supplied here, the DefaultNoStatus configuration property value will be used.

    .EXAMPLE
        Set-GitHubMilestone -OwnerName Microsoft -RepositoryName PowerShellForGitHub -Milestone 1 -Title "Testing this API"

        Update an existing milestone for the Microsoft\PowerShellForGitHub project.

    .NOTES
        For more information on how GitHub handles the dates specified in DueOn, please refer to
        this support forum post:
        https://github.community/t5/How-to-use-Git-and-GitHub/Milestone-quot-Due-On-quot-field-defaults-to-7-00-when-set-by-v3/m-p/6901

        Please note that due to artifacts of how GitHub was originally designed, all timestamps
        in the GitHub database are normalized to Pacific Time.  This means that any dates specified
        that occur before 7am UTC will be considered timestamps for the _previous_ day.

        Given that GitHub drops the _time_ aspect of this DateTime, this function will ensure that
        the requested DueOn date specified is honored by manipulating the time as needed.
#>
    [CmdletBinding(
        SupportsShouldProcess,
        DefaultParameterSetName='Elements')]
    [Diagnostics.CodeAnalysis.SuppressMessageAttribute("PSShouldProcess", "", Justification="Methods called within here make use of PSShouldProcess, and the switch is passed on to them inherently.")]
    param(
        [Parameter(Mandatory, ParameterSetName='Elements')]
        [string] $OwnerName,

        [Parameter(Mandatory, ParameterSetName='Elements')]
        [string] $RepositoryName,

        [Parameter(Mandatory, ParameterSetName='Uri')]
        [string] $Uri,

        [Parameter(Mandatory, ParameterSetName='Uri')]
        [Parameter(Mandatory, ParameterSetName='Elements')]
        [int64] $Milestone,

        [Parameter(Mandatory, ParameterSetName='Uri')]
        [Parameter(Mandatory, ParameterSetName='Elements')]
        [string] $Title,

        [ValidateSet('Open', 'Closed')]
        [string] $State,

        [string] $Description,

        [DateTime] $DueOn,

        [string] $AccessToken,

        [switch] $NoStatus
    )

    Write-InvocationLog

    $elements = Resolve-RepositoryElements
    $OwnerName = $elements.ownerName
    $RepositoryName = $elements.repositoryName

    $telemetryProperties = @{
        'OwnerName' = (Get-PiiSafeString -PlainText $OwnerName)
        'RepositoryName' = (Get-PiiSafeString -PlainText $RepositoryName)
        'Title' =  (Get-PiiSafeString -PlainText $Title)
        'Milestone' =  (Get-PiiSafeString -PlainText $Milestone)
    }

    $hashBody = @{
        'title' = $Title
    }

    if ($PSBoundParameters.ContainsKey('State'))
    {
        $State = $State.ToLower()
        $hashBody.add('state', $State)
    }

    if ($PSBoundParameters.ContainsKey('Description'))
    {
        $hashBody.add('description', $Description)
    }

    if ($PSBoundParameters.ContainsKey('DueOn'))
    {
        # If you set 'due_on' to be '2020-09-24T06:59:00Z', GitHub considers that to be '2020-09-23T07:00:00Z'
        # And if you set 'due_on' to be '2020-09-24T07:01:00Z', GitHub considers that to be '2020-09-24T07:00:00Z'
        # SO....we can't depend on the typical definition of midnight when trying to specify a specific day.
        # Instead, we'll use 9am on the designated date to ensure we're always dealing with the
        # same date that GitHub uses, regardless of the current state of Daylight Savings Time.
        # (See .NOTES for more info)
        $modifiedDueOn = $DueOn.ToUniversalTime().date.AddHours($script:minimumHoursToEnsureDesiredDateInPacificTime)
        $dueOnFormattedTime = $modifiedDueOn.ToString('o')
        $hashBody.add('due_on', $dueOnFormattedTime)
    }

    $params = @{
        'UriFragment' = "repos/$OwnerName/$RepositoryName/milestones/$Milestone"
        'Body' = (ConvertTo-Json -InputObject $hashBody)
        'Method' = 'Patch'
        'Description' =  "Setting milestone $Milestone for $RepositoryName"
        'AccessToken' = $AccessToken
        'TelemetryEventName' = $MyInvocation.MyCommand.Name
        'TelemetryProperties' = $telemetryProperties
        'NoStatus' = (Resolve-ParameterWithDefaultConfigurationValue -Name NoStatus -ConfigValueName DefaultNoStatus)
    }

    return Invoke-GHRestMethod @params
}

function Remove-GitHubMilestone
{
<#
    .DESCRIPTION
        Deletes a Github milestone for the given repository

        The Git repo for this module can be found here: http://aka.ms/PowerShellForGitHub

    .PARAMETER OwnerName
        Owner of the repository.
        If not supplied here, the DefaultOwnerName configuration property value will be used.

    .PARAMETER RepositoryName
        Name of the repository.
        If not supplied here, the DefaultRepositoryName configuration property value will be used.

    .PARAMETER Uri
        Uri for the repository.
        The OwnerName and RepositoryName will be extracted from here instead of needing to provide
        them individually.

    .PARAMETER Milestone
        The number of a specific milestone to delete.

    .PARAMETER AccessToken
        If provided, this will be used as the AccessToken for authentication with the
        REST Api.  Otherwise, will attempt to use the configured value or will run unauthenticated.

    .PARAMETER NoStatus
        If this switch is specified, long-running commands will run on the main thread
        with no commandline status update.  When not specified, those commands run in
        the background, enabling the command prompt to provide status information.
        If not supplied here, the DefaultNoStatus configuration property value will be used.

    .EXAMPLE
        Remove-GitHubMilestone -OwnerName Microsoft -RepositoryName PowerShellForGitHub -Milestone 1

        Deletes a Github milestone from the Microsoft\PowerShellForGitHub project.

    .EXAMPLE
        Remove-GitHubMilestone -OwnerName Microsoft -RepositoryName PowerShellForGitHub -Milestone 1 -Confirm:$false

        Deletes a Github milestone from the Microsoft\PowerShellForGitHub project. Will not prompt for confirmation, as -Confirm:$false was specified.
#>
    [CmdletBinding(
        SupportsShouldProcess,
        DefaultParameterSetName='Elements',
        ConfirmImpact="High")]
    [Alias('Delete-GitHubMilestone')]
    [Diagnostics.CodeAnalysis.SuppressMessageAttribute("PSReviewUnusedParameter", "", Justification="One or more parameters (like NoStatus) are only referenced by helper methods which get access to it from the stack via Get-Variable -Scope 1.")]
    param(
        [Parameter(Mandatory, ParameterSetName='Elements')]
        [string] $OwnerName,

        [Parameter(Mandatory, ParameterSetName='Elements')]
        [string] $RepositoryName,

        [Parameter(Mandatory, ParameterSetName='Uri')]
        [string] $Uri,

        [Parameter(Mandatory, ParameterSetName='Uri')]
        [Parameter(Mandatory, ParameterSetName='Elements')]
        [string] $Milestone,

        [string] $AccessToken,

        [switch] $NoStatus
    )

    Write-InvocationLog

    $elements = Resolve-RepositoryElements
    $OwnerName = $elements.ownerName
    $RepositoryName = $elements.repositoryName

    $telemetryProperties = @{
        'OwnerName' = (Get-PiiSafeString -PlainText $OwnerName)
        'RepositoryName' = (Get-PiiSafeString -PlainText $RepositoryName)
        'Milestone' =  (Get-PiiSafeString -PlainText $Milestone)
    }

    if ($PSCmdlet.ShouldProcess($Milestone, "Remove milestone"))
    {
        $params = @{
            'UriFragment' = "repos/$OwnerName/$RepositoryName/milestones/$Milestone"
            'Method' = 'Delete'
            'Description' =  "Removing milestone $Milestone for $RepositoryName"
            'AccessToken' = $AccessToken
            'TelemetryEventName' = $MyInvocation.MyCommand.Name
            'TelemetryProperties' = $telemetryProperties
            'NoStatus' = (Resolve-ParameterWithDefaultConfigurationValue -Name NoStatus -ConfigValueName DefaultNoStatus)
        }

        return Invoke-GHRestMethod @params
    }
}