From ececdecdaf6c6f6295d31a92f0663d703e7760dd Mon Sep 17 00:00:00 2001
From: Charlie Stanton <charlie@shtanton.xyz>
Date: Tue, 23 Aug 2022 22:09:14 +0100
Subject: Initial commit

No parsing yet, but the execution is not bad

Commands:
- Print value
- Toggle terminal (switch between array and map)
- Filter command

Filters:
- Path filter

Path filters are compiled from a regex like AST
---
 main/filter.go | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)
 create mode 100644 main/filter.go

(limited to 'main/filter.go')

diff --git a/main/filter.go b/main/filter.go
new file mode 100644
index 0000000..95e6d82
--- /dev/null
+++ b/main/filter.go
@@ -0,0 +1,34 @@
+package main
+
+type PathFilter struct {
+	initial PathFilterState
+}
+func (filter PathFilter) exec(state *ProgramState) bool {
+	pathFilterState := make(map[PathFilterState]struct{})
+	pathFilterState[filter.initial] = struct{}{}
+	for _, segment := range state.space.path {
+		nextPathFilterState := make(map[PathFilterState]struct{})
+		for curState := range pathFilterState {
+			for nextState := range curState.eat(segment) {
+				nextPathFilterState[nextState] = struct{}{}
+			}
+		}
+		pathFilterState = nextPathFilterState
+	}
+	for pathState := range pathFilterState {
+		if pathState.accept() {
+			return true
+		}
+	}
+	return false
+}
+
+type RangeFilter struct {
+	start Filter
+	end Filter
+	active bool
+}
+
+type Filter interface {
+	exec(*ProgramState) bool
+}
\ No newline at end of file
-- 
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