Add js-string safe split func

src/utils.rs

@@ -0,0 +1,90 @@
+/// String safe splitting
+/// Strings in this case being literal strings in JavaScript source code 
+pub fn str_safe_split(to_split: &str, split_char: char) -> Vec<String> {
+    let mut current_str = String::new();
+    let mut matches = vec![];
+
+    // Doesn't matter what this is. Backslash is only checked while in strings and that is the only reason why this var is used
+    let mut last_char = 'a';
+    // Used for checking if we should exit a string
+    let mut str_open_char = '"';
+    let mut in_string = false;
+    println!("Entering loop");
+    let mut split_iter = to_split.chars().into_iter();
+    while let Some(c) = split_iter.next() {
+        match c {
+            '\'' => {
+                if in_string && str_open_char == '\'' && last_char != '\\' {
+                    in_string = false;
+                    println!("Exiting string quoted with '");
+                }
+                else if !in_string {
+                    str_open_char = '\'';
+                    in_string = true;
+                    println!("Entered string quoted with '");
+                }
+            },
+            '"' => {
+                if in_string && str_open_char == '"' && last_char != '\\' {
+                    println!("Exiting string quoted with \"");
+                    in_string = false;
+                }
+                else if !in_string {
+                    str_open_char = '"';
+                    in_string = true;
+                    println!("Entered string quoted with \"");
+                }
+            },
+            '`' => {
+                if in_string && str_open_char == '`' && last_char != '\\' {
+                    in_string = false;
+                    println!("Exiting string quoted with `");
+                }
+                else if !in_string {
+                    str_open_char = '`';
+                    in_string = true;
+                    println!("Entered string quoted with `");
+                }
+            },
+            _ => {}
+        }
+        last_char = c.clone();
+        if in_string {
+            current_str.push(c.clone());
+        } else {
+            if c == split_char {
+                matches.push(current_str);
+                current_str = String::new();
+            } else {
+                current_str.push(c.clone());
+            }
+        }
+    }
+    matches.push(current_str);
+    matches
+}
+
+
+#[test]
+fn test_str_safe_split_1() {
+    let res = str_safe_split("this is a test", ' ');
+    assert_eq!(res, vec!["this","is","a","test"]);
+}
+
+#[test]
+fn test_str_safe_split_2() {
+    let res = str_safe_split("Quote \"test one\"", ' ');
+    assert_eq!(res, vec!["Quote", "\"test one\""]);
+}
+
+#[test]
+fn test_str_safe_split_3() {
+    let res = str_safe_split("Quote \"test one\" with 'more quotes' and '`even quotes` in quotes'", ' ');
+    assert_eq!(res, vec!["Quote", "\"test one\"", "with", "'more quotes'", "and", "'`even quotes` in quotes'"]);
+}
+
+#[test]
+fn test_str_safe_split_4() {
+    let res = str_safe_split("Unfinished 'quote", ' ');
+    assert_eq!(res, vec!["Unfinished", "'quote"]);
+}