From 094c9a8921fb5f54a34d8cdcb924b5dbacd336d8 Mon Sep 17 00:00:00 2001
From: Charlie Stanton <charlie@shtanton.xyz>
Date: Fri, 26 Aug 2022 18:15:56 +0100
Subject: Adds a bunch of new path pattern features

- Bracketting in expressions
- OR with |
- Optional with ?
---
 main/pathfilterast.go | 30 ++++++++++++++++++++++++------
 1 file changed, 24 insertions(+), 6 deletions(-)

(limited to 'main/pathfilterast.go')

diff --git a/main/pathfilterast.go b/main/pathfilterast.go
index c2ddc7f..c84b8af 100644
--- a/main/pathfilterast.go
+++ b/main/pathfilterast.go
@@ -24,19 +24,19 @@ type RepeatPathFilterAST struct {
 	content PathFilterAST
 }
 func (ast RepeatPathFilterAST) compileWith(next PathFilterState) PathFilterState {
-	nextGroup := &GroupPathFilter{}
+	nextGroup := &OrPathFilter{}
 	repeatStart := ast.content.compileWith(nextGroup)
-	nextGroup.filters = []PathFilterState{next, repeatStart}
+	nextGroup.filters = [2]PathFilterState{next, repeatStart}
 	return nextGroup
 }
 
 type SequencePathFilterAST struct {
-	sequence []PathFilterAST
+	first PathFilterAST
+	second PathFilterAST
 }
 func (ast SequencePathFilterAST) compileWith(next PathFilterState) PathFilterState {
-	for i := len(ast.sequence) - 1; i >= 0; i -= 1 {
-		next = ast.sequence[i].compileWith(next)
-	}
+	next = ast.second.compileWith(next)
+	next = ast.first.compileWith(next)
 	return next
 }
 
@@ -45,6 +45,24 @@ func (ast AnySegmentPathFilterAST) compileWith(next PathFilterState) PathFilterS
 	return AnySegmentPathFilter{next: next}
 }
 
+type OrPathFilterAST struct {
+	first PathFilterAST
+	second PathFilterAST
+}
+func (ast OrPathFilterAST) compileWith(next PathFilterState) PathFilterState {
+	return OrPathFilter {
+		filters: [2]PathFilterState{
+			ast.first.compileWith(next),
+			ast.second.compileWith(next),
+		},
+	}
+}
+
+type NonePathFilterAST struct {}
+func (ast NonePathFilterAST) compileWith(next PathFilterState) PathFilterState {
+	return next
+}
+
 type PathFilterAST interface {
 	compileWith(PathFilterState) PathFilterState
 }
-- 
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