Transform into library

Signed-off-by: Thomas Klaehn <thomas.klaehn@perinet.io>

src/lib.rs

@@ -0,0 +1,72 @@
+use std::io::prelude::*;
+use std::io::BufReader;
+use std::fs::File;
+use chrono::{DateTime, Utc};
+use nmea_parser::*;
+
+#[derive(Debug)]
+pub struct ParseResult {
+    lat: f64,
+    lon: f64,
+    timestamp: DateTime<Utc>,
+    speed: f64
+}
+
+pub struct GpsParser {
+    gps_file: String,
+}
+
+impl GpsParser {
+    pub fn new(gps_device: &str) -> GpsParser{
+        GpsParser {
+            gps_file: format!("{}",gps_device),
+        }
+    }
+
+    pub fn parse_nmea(&mut self) -> Result<ParseResult, ParseError> {
+        let f = match File::open(&self.gps_file) {
+            Ok(f) => f,
+            Err(error) => panic!("Error: {error:?}"),
+        };
+        let mut reader = BufReader::new(f);
+        let mut line = String::new();
+        let mut parser = NmeaParser::new();
+        let mut res = ParseResult {
+            lat: 0.0,
+            lon: 0.0,
+            timestamp: Utc::now(),
+            speed: 0.0,
+        };
+
+        let mut parsing_complete = false;
+        let mut parsed_gga:bool = false;
+        let mut parsed_vtg:bool = false;
+        while !parsing_complete {
+                let len = match reader.read_line(&mut line) {
+                Ok(len) => len,
+                Err(_) => 0,
+            };
+            if len > 1 {
+                match parser.parse_sentence(&line)? {
+                    ParsedMessage::Gga(gga) => {
+                        parsed_gga = true;
+                        res.lat = gga.latitude.unwrap();
+                        res.lon = gga.longitude.unwrap();
+                        res.timestamp = gga.timestamp.unwrap();
+                    },
+                    ParsedMessage::Vtg(vtg) => {
+                        parsed_vtg = true;
+                        res.speed = vtg.sog_kph.unwrap();
+                    },
+                    _ => {
+                    }
+                }
+            }
+            if parsed_gga && parsed_vtg {
+                parsing_complete = true;
+            }
+            line.clear();
+        }
+        Ok(res)
+    }
+}

src/main.rs

@@ -1,60 +0,0 @@
-use std::io::prelude::*;
-use std::io::BufReader;
-use std::fs::File;
-use nmea_parser::*;
-
-fn main() -> std::io::Result<()> {
-    let f = File::open("/dev/ttyACM0")?;
-    let mut reader = BufReader::new(f);
-
-    let mut line = String::new();
-
-    let mut parser = NmeaParser::new();
-    loop {
-        let len = reader.read_line(&mut line)?;
-        if len > 1 {
-            match parser.parse_sentence(&line) {
-                Ok(msg) => {
-                    match msg {
-                        ParsedMessage::Gga(gga) => {
-                            println!("Source:          {}",     gga.source);
-                            println!("Latitude:        {:.3}°", gga.latitude.unwrap());
-                            println!("Longitude:       {:.3}°", gga.longitude.unwrap());
-                            match gga.satellite_count {
-                                Some(sat_count) => {
-                                    println!("Satellite count: {}", sat_count);
-                                },
-                                None => {
-                                    println!("No satellites in sight");
-                                }
-                            }
-                            match gga.timestamp {
-                                Some(timestamp) => {
-                                    println!("Timestamp:       {}", timestamp);
-                                },
-                                None => {
-                                    println!("No timestamp
-                                    ")
-                                }
-                            }
-                        },
-                        // ParsedMessage::Gsa(gsa) => {
-                        //     println!("{}", gsa.mode1_automatic)
-                        // }
-                        _ => {
-                        }
-                    }
-                },
-                Err(_err) => {}
-            }
-        }
-        line.clear();
-    }
-}
-
-// $GNRMC,204607.00,A,5222.24380,N,01351.13504,E,0.103,,210621,,,A*62
-// $GNVTG,,T,,M,0.103,N,0.191,K,A*36
-// $GNGGA,204607.00,5222.24380,N,01351.13504,E,1,08,1.29,29.2,M,41.8,M,,*7C
-// $GNGSA,A,3,04,09,06,03,07,26,,,,,,,1.90,1.29,1.39*1E
-// $GPGSV,4,1,13,02,40,283,19,03,08,126,08,04,39,073,27,06,44,232,31*77
-// $GNGLL,5222.24380,N,01351.13504,E,204607.00,A,A*7F