From d7cbdf04e95ccf9b49cf9ce204f5df66c04d19d6 Mon Sep 17 00:00:00 2001
From: Billy Zaelani Malik <m.billyzaelani@gmail.com>
Date: Wed, 20 Dec 2023 15:37:39 +0700
Subject: [PATCH] geeksforgeeks: add wildcard pattern matching

---
 .../wildcard-pattern-matching/README.md       | 18 ++++++++
 .../wildcard-pattern-matching/solution.go     | 41 +++++++++++++++++++
 .../solution_test.go                          | 41 +++++++++++++++++++
 3 files changed, 100 insertions(+)
 create mode 100644 geeksforgeeks/wildcard-pattern-matching/README.md
 create mode 100644 geeksforgeeks/wildcard-pattern-matching/solution.go
 create mode 100644 geeksforgeeks/wildcard-pattern-matching/solution_test.go

diff --git a/geeksforgeeks/wildcard-pattern-matching/README.md b/geeksforgeeks/wildcard-pattern-matching/README.md
new file mode 100644
index 0000000..549c1c8
--- /dev/null
+++ b/geeksforgeeks/wildcard-pattern-matching/README.md
@@ -0,0 +1,18 @@
+# Wildcard Pattern Matching
+
+Given a text and a wildcard pattern,
+implement wildcard pattern matching algorithm that finds if wildcard pattern is matched with text.
+The matching should cover the entire text (not partial text).
+The wildcard pattern can include the characters ? and *.
+
+- ? – matches any single character
+- * – Matches any sequence of characters (including the empty sequence)
+
+## Copyright Notice
+
+This problem is based on [content](https://www.geeksforgeeks.org/wildcard-pattern-matching/)
+from [GeeksforGeeks](https://www.geeksforgeeks.org)
+written by Aditya Goel
+and subject to [GeeksforGeeks copyright](https://www.geeksforgeeks.org/legal/copyright-information/).
+The original content from GeeksforGeeks and any modifications made here are attributed to GeeksforGeeks contributors,
+and this work is shared under [CC BY-SA 4.0](../LICENSE).
diff --git a/geeksforgeeks/wildcard-pattern-matching/solution.go b/geeksforgeeks/wildcard-pattern-matching/solution.go
new file mode 100644
index 0000000..5174385
--- /dev/null
+++ b/geeksforgeeks/wildcard-pattern-matching/solution.go
@@ -0,0 +1,41 @@
+package wildcard_pattern_matching
+
+func Solution(text string, pattern string) bool {
+	n, m := len(text), len(pattern)
+	tStart, tEnd := 0, 0  // text window index
+	pStart, pEnd := -1, 0 // pattern window index
+
+	for tEnd < n {
+		if pEnd >= m {
+			break
+		}
+
+		if pattern[pEnd] == '?' || pattern[pEnd] == text[tEnd] {
+			tEnd++
+			pEnd++
+			continue
+		}
+
+		if pattern[pEnd] == '*' {
+			tStart = tEnd
+			pEnd++
+			pStart = pEnd
+			continue
+		}
+
+		if pStart != -1 {
+			tStart++
+			tEnd = tStart
+			pEnd = pStart
+			continue
+		}
+
+		return false
+	}
+
+	for pEnd < m && pattern[pEnd] == '*' {
+		pEnd++
+	}
+
+	return pEnd == m
+}
diff --git a/geeksforgeeks/wildcard-pattern-matching/solution_test.go b/geeksforgeeks/wildcard-pattern-matching/solution_test.go
new file mode 100644
index 0000000..4e4c90e
--- /dev/null
+++ b/geeksforgeeks/wildcard-pattern-matching/solution_test.go
@@ -0,0 +1,41 @@
+package wildcard_pattern_matching_test
+
+import (
+	"testing"
+
+	sut "github.com/minizilla/minmax/geeksforgeeks/wildcard-pattern-matching"
+	"github.com/minizilla/testr"
+)
+
+func TestWildcardPatternMatching(t *testing.T) {
+	tests := map[string]struct {
+		text, pattern string
+		matched       bool
+	}{
+		"no wildcard matched":   {"abcdef", "abcdef", true},
+		"no wildcard unmatched": {"abcdef", "abcdez", false},
+		"?: one":                {"abcdef", "?bcdef", true},
+		"?: middle":             {"abcdef", "ab?def", true},
+		"?: sides":              {"abcdef", "?bcde?", true},
+		"?: random":             {"abcdef", "??cd?f", true},
+		"?: unmatched":          {"abcdef", "???d??f", false},
+		"*: full matched":       {"abcdef", "*abcdef", true},
+		"*: one":                {"abcdef", "*", true},
+		"*: middle":             {"abcdef", "a*f", true},
+		"*: sides":              {"abcdef", "*c*", true},
+		"*: random":             {"abcdef", "*cd***f", true},
+		"*: multi-prefix":       {"acccdef", "*ccd**f*", true},
+		"*: unmatched":          {"abcdef", "*d****d*", false},
+		"combine: separate":     {"abcdef", "*d?f", true},
+		"combine: unite":        {"abcdef", "*?f", true},
+		"combine: unmatched":    {"abcdef", "*f?", false},
+	}
+
+	for name, tc := range tests {
+		t.Run(name, func(t *testing.T) {
+			assert := testr.New(t)
+			matched := sut.Solution(tc.text, tc.pattern)
+			assert.Equal(matched, tc.matched)
+		})
+	}
+}