From 86c489c3c8ab1fa46fdcae022289f414f2de04cd Mon Sep 17 00:00:00 2001
From: Arturs Artamonovs <arturs.artamonovs@protonmail.com>
Date: Wed, 5 Jun 2024 09:09:36 +0100
Subject: Decoder part

---
 ADSBDecoder/main.swift | 119 ++++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 118 insertions(+), 1 deletion(-)

(limited to 'ADSBDecoder/main.swift')

diff --git a/ADSBDecoder/main.swift b/ADSBDecoder/main.swift
index fa84962..a324a0f 100644
--- a/ADSBDecoder/main.swift
+++ b/ADSBDecoder/main.swift
@@ -6,6 +6,123 @@
 //
 
 import Foundation
+import ArgumentParser
+import RegexBuilder
 
-print("Hello, World!")
+//return true if file excists
+func checkIfFileExists(_ fname: String) -> Bool {
+    let fm = FileManager.default
+    if fm.fileExists(atPath: fname) {
+        return true
+    }
+    return false
+}
 
+//get current run directory
+func getCurrentDirPath() -> String {
+    return Process().currentDirectoryPath
+}
+
+struct CommandLineArgs: ParsableCommand {
+    @Option(name: .shortAndLong) var inputfile: String
+    @Flag(name: .shortAndLong) var debug:Bool = false
+    @Flag(name: .shortAndLong) var version:Bool = false
+    @Flag(name: .shortAndLong) var show_stats:Bool = false
+}
+
+let args = CommandLineArgs.parseOrExit()
+
+let fileUrl = URL(fileURLWithPath:args.inputfile)
+print("File location [\(fileUrl.absoluteString)]")
+
+//check if file excists
+if (checkIfFileExists(fileUrl.path) == false) {
+    print("Supplied path \(fileUrl.path) doesnt exists")
+    exit(1)
+}
+
+//load the file with adsb data
+var adsb_source = ""
+do {
+    adsb_source = try String(contentsOfFile: fileUrl.path)
+    print("Loaded \(adsb_source.count) bytes")
+} catch {
+    print("Couldn't load text from a file \(fileUrl.path)")
+    exit(1)
+}
+
+
+
+let matchADSBLong = Regex {
+    Anchor.startOfLine
+    "*"
+    
+        Repeat(
+            CharacterClass(
+                ("a"..."f"),
+                ("0"..."9")
+            )
+            ,count:28)
+    
+    ";"
+}
+
+let matchADSBShort = Regex {
+    Anchor.startOfLine
+    "*"
+    Repeat(
+        CharacterClass(
+            ("a"..."f"),
+            ("0"..."9")
+        )
+        ,count:14)
+    ";"
+}
+
+//gather stats
+var q_df = QueryDF()
+var q_dftc = QueryDF17TC()
+
+//parse line by line
+var cnt=0
+for line in adsb_source.components(separatedBy: .newlines) {
+    var found=false
+    //print("\(cnt) \(line)")
+    //cnt += 1
+    if let tokenMatch = try matchADSBLong.prefixMatch(in: line) {
+        //print("\(String(tokenMatch.output))")
+        found = true
+        let str = String(tokenMatch.output)
+        let startIndex = str.index(str.startIndex, offsetBy: 1)
+        let endIndex = str.index(str.endIndex, offsetBy: -2)
+        let decoder = Decoder(String(str[startIndex...endIndex]))
+        if decoder.DataFormat == 17 {
+            if let d17 = decoder.getDataFormat17() {
+                //print(d17)
+                q_dftc.addTC(d17.TypeCode)
+            }
+        } else {
+            
+        }
+        q_df.addDF(decoder.DataFormat)
+    };
+    
+    if let tokenMatch = try matchADSBShort.prefixMatch(in: line) {
+        print("\(tokenMatch.output)")
+        found = true
+    };
+    
+    if (found == false) {
+        print("Unknown adsb data line \(line)")
+    }
+    
+    
+}
+
+
+if args.show_stats {
+    print("----STAT----")
+    //q_df.showStat()
+    print(q_df)
+    print(q_dftc)
+}
-- 
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