68 lines
2.6 KiB
PowerShell
68 lines
2.6 KiB
PowerShell
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function Remove-PersonaConditionNode {
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<#
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.SYNOPSIS
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Removes a condition or nested group from a rule's condition tree (FR-028).
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.DESCRIPTION
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Two structural rules are enforced here rather than left to schema validation,
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because both would otherwise produce a document the schema calls invalid with
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no indication which editor action caused it:
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- The root group itself cannot be removed - a rule's `match` is required
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(RE-001). Delete the rule instead (Remove-PersonaConfigRule).
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- A group's last remaining condition cannot be removed - an empty
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`conditions` array violates the schema's `minItems: 1` on conditionGroup.
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Remove the parent group instead, or add a replacement first.
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.PARAMETER Group
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The rule's `match` condition group (the root).
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.PARAMETER Path
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Path (see Get-PersonaConditionNode) to the node to remove. Must not be empty.
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.OUTPUTS
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System.Object - the same Group, mutated in place, returned for convenience.
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#>
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[CmdletBinding()]
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[OutputType([object])]
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param(
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[Parameter(Mandatory)]
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[object] $Group,
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[Parameter(Mandatory)]
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[AllowEmptyCollection()]
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[int[]] $Path
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)
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if (@($Path).Count -eq 0) {
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throw "The root condition group cannot be removed this way - delete the rule instead."
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}
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# Special-cased at length 1 because PowerShell's range operator treats 0..-1 as
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# the two-element descending range (0, -1), not an empty range - the naive slice
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# would silently pick up the wrong parent for a top-level path.
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$parentPath = (@($Path).Count -eq 1) ? @() : @($Path)[0..($Path.Count - 2)]
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$index = @($Path)[-1]
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$parent = Get-PersonaConditionNode -Group $Group -Path $parentPath
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$children = @($parent.conditions)
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if ($index -lt 0 -or $index -ge $children.Count) {
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throw "Path segment $index is out of range - this group has $($children.Count) condition(s)."
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}
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if ($children.Count -eq 1) {
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throw 'This is the only condition in its group. A group requires at least one condition - remove the group itself instead, or add a replacement first.'
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}
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# Removed by position, not by value or reference - two structurally identical
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# sibling conditions are otherwise indistinguishable.
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$remaining = [System.Collections.Generic.List[object]]::new()
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for ($i = 0; $i -lt $children.Count; $i++) {
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if ($i -ne $index) { $remaining.Add($children[$i]) }
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}
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$parent.conditions = $remaining.ToArray()
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$Group
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}
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