From 9345904992d0795435ae364c825aa527310d1152 Mon Sep 17 00:00:00 2001
From: mohammad <m.mobasher.z@gmail.com>
Date: Tue, 25 Oct 2022 14:38:25 +0330
Subject: [PATCH] make Persian module for recognize persian texts

---
 Persian/persian.go | 45 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 45 insertions(+)
 create mode 100644 Persian/persian.go

diff --git a/Persian/persian.go b/Persian/persian.go
new file mode 100644
index 0000000..24f78e6
--- /dev/null
+++ b/Persian/persian.go
@@ -0,0 +1,45 @@
+package persian
+
+import (
+	"regexp"
+)
+
+var faAlphabet string = `\x{0621}-\x{0628}\x{062A}-\x{063A}\x{0641}-\x{0642}\x{0644}-\x{0648}\x{064E}-\x{0651}\x{0655}\x{067E}\x{0686}\x{0698}\x{06A9}\x{06AF}\x{06BE}\x{06CC}`
+var faNumber string = `\x{06F0}-\x{06F9}`
+
+// var faShortVowels string = "َُِ"
+var faMixedWithArabic string = `\x{0629}\x{0643}\x{0649}-\x{064B}\x{064D}\x{06D5}`
+var faText string = faAlphabet + faNumber //+ faShortVowels
+var faComplexText string = faText + faMixedWithArabic
+var trimPattern string = `[\"'-+()؟\s.]`
+
+func IsFarsi(
+	text string,
+	isComplex bool,
+) bool {
+	return IsPersian(text, isComplex)
+}
+
+func IsPersian(
+	text string,
+	isComplex bool,
+) bool {
+	regexTrimPattern := regexp.MustCompile(trimPattern)
+	text = string(regexTrimPattern.ReplaceAll([]byte(text), []byte("")))
+
+	var regex string
+	if isComplex {
+		regex = faComplexText
+	} else {
+		regex = faText
+	}
+
+	persianCompiledRegex := regexp.MustCompile("^[" + regex + "]+&")
+	for _, item := range persianCompiledRegex.Split(text, -1) {
+		if item != "" && item != " " {
+			return false
+		}
+
+	}
+	return true
+}