From d591c694dd3cb93112029c43cf2ee574a1417351 Mon Sep 17 00:00:00 2001
From: William Casarin <jb55@jb55.com>
Date: Wed, 28 Jun 2023 23:24:47 -0400
Subject: [PATCH] Add simple parser

Just getting warmed up. This will be used for note parsing.
---
 src/lib.rs    |  1 +
 src/parser.rs | 41 +++++++++++++++++++++++++++++++++++++++++
 2 files changed, 42 insertions(+)
 create mode 100644 src/parser.rs

diff --git a/src/lib.rs b/src/lib.rs
index a380f45c..627f0430 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -2,6 +2,7 @@ mod app;
 //mod camera;
 mod contacts;
 mod error;
+mod parser;
 
 pub use app::Damus;
 pub use error::Error;
diff --git a/src/parser.rs b/src/parser.rs
new file mode 100644
index 00000000..17582dca
--- /dev/null
+++ b/src/parser.rs
@@ -0,0 +1,41 @@
+use log::info;
+
+struct Parser<'a> {
+    data: &'a str,
+    pos: usize,
+}
+
+impl<'a> Parser<'a> {
+    fn new(data: &'a str) -> Parser {
+        Parser { data: data, pos: 0 }
+    }
+
+    fn parse_until(&mut self, needle: char) -> bool {
+        let mut count = 0;
+        for c in self.data[self.pos..].chars() {
+            if c == needle {
+                self.pos += count - 1;
+                return true;
+            } else {
+                count += 1;
+            }
+        }
+
+        return false;
+    }
+}
+
+#[cfg(test)]
+mod test {
+    use super::*;
+
+    #[test]
+    fn test_parser() {
+        let s = "hey there #hashtag";
+        let mut parser = Parser::new(s);
+        parser.parse_until('#');
+        assert_eq!(parser.pos, 9);
+        parser.parse_until('t');
+        assert_eq!(parser.pos, 14);
+    }
+}