lynnesbian/AusPostCode
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barcode object with (half of a skeleton) framework for parsing input

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This commit is contained in:
Lynne Megido 2020-10-14 02:03:20 +10:00
parent b86f58c39f
commit 71590dc93d
Signed by: lynnesbian
GPG key ID: F0A184B5213D9F90
7 changed files with 387 additions and 56 deletions
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1
.gitignore vendored
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@ -1,3 +1,4 @@
bin/
obj/
out/
spec.*

1
.idea/.idea.auspostcode.dir/.idea/contentModel.xml
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@ -15,6 +15,7 @@
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<e p="LICENSE" t="Include" />
<e p="Program.cs" t="Include" />
<e p="auspostcode.csproj" t="IncludeRecursive" />

187
.idea/.idea.auspostcode.dir/.idea/workspace.xml
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@ -3,33 +3,71 @@
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109
Barcode.cs
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@ -1,8 +1,26 @@
using System;
using System.Collections.Generic;
using System.Text;
using System.Text.RegularExpressions;
namespace AusPostCode {
public class Barcode {
public Dictionary<int, string> FormatTable = new Dictionary<int, string>() {
public enum BarcodeFragment {
FormatControlCode,
SortingCode,
CustomerInformation,
ErrorCorrection,
}
public enum EncodingFormat {
N,
C,
BarToDecimal,
}
private int _formatCode;
public Dictionary<int, string> FormatTable = new Dictionary<int, string> {
[0] = "Null Customer Barcode",
[11] = "Standard Customer Barcode",
[52] = "Customer Business Reply Paid",
@ -10,14 +28,95 @@ namespace AusPostCode {
[62] = "Customer Barcode 3",
[67] = "Customer Business Reply Paid",
[72] = "International Business Reply Paid",
[77] = "International Business Reply Paid"
[77] = "International Business Reply Paid",
};
public int SortingCode { get; set; }
public int CustomerInformation { get; set; }
public string Code { get; set; }
public Barcode(string code) {
Code = code;
// - check for start and end bars
if (Code.Substring(0, 2) != "13") {
Warnings.Add("Couldn't find Start Bars");
Code = $"13{Code}";
}
if (Code.Substring(Code.Length - 3, 2) != "13") {
Warnings.Add("Couldn't find End Bars");
Code = $"{Code}13";
}
// process Format Control Code
_formatCode = int.Parse(Decode(GetFragment(BarcodeFragment.FormatControlCode), EncodingFormat.N));
Console.WriteLine(Format);
// process Sorting Code Field
SortingCode = int.Parse(Decode(GetFragment(BarcodeFragment.SortingCode), EncodingFormat.N));
Console.WriteLine($"Sorting code: {SortingCode}");
}
public int SortingCode { get; set; }
public int CustomerInformation { get; set; }
public string Format => FormatTable.ContainsKey(_formatCode) ? FormatTable[_formatCode] : $"Unknown ({_formatCode})";
private List<string> Warnings { get; set; } = new List<string>();
private string Code { get; set; }
private string GetFragment(BarcodeFragment barcodeFragment) {
return barcodeFragment switch {
BarcodeFragment.FormatControlCode => Code.Substring(2, 4),
BarcodeFragment.SortingCode => Code.Substring(6, 16),
BarcodeFragment.CustomerInformation when _formatCode == 59 => Code.Substring(22, 16),
BarcodeFragment.CustomerInformation when _formatCode == 62 => Code.Substring(22, 31),
BarcodeFragment.CustomerInformation => null, // format doesn't support the customer information field
BarcodeFragment.ErrorCorrection => Code.Substring(Code.Length - 15,
12), // the error correction bars are always immediately before the stop bars
_ => throw new ArgumentOutOfRangeException(nameof(barcodeFragment), barcodeFragment, null),
};
}
private static string Decode(string input, EncodingFormat format) {
// bool badData;
var chunkLength = format == EncodingFormat.N ? 2 : 3;
if (input.Length % 2 != 0) {
throw new ArgumentException($"Input length must be a multiple of {chunkLength}.", nameof(input));
}
var rx = new Regex("^[0123]+$");
if (!rx.IsMatch(input)) {
throw new ArgumentException("Input length must be a quaternary number.", nameof(input));
}
var sb = new StringBuilder();
for (var i = 0; i < input.Length; i += chunkLength) {
var chunk = input.Substring(i, chunkLength);
switch (format) {
case EncodingFormat.N:
// format N supports the digits 0 through 9, and nothing else.
// digits 0 through 8 are stored as their ternary representations, while 9 is stored as "30".
if (chunk == "30") {
sb.Append(9);
}
else if (chunk.Contains("3")) {
// not a ternary number
throw new ArgumentException($"{chunk} is not a valid identifier for format {format.ToString()}.");
}
else {
sb.Append(BaseConversion.FromBase(chunk, 3));
}
break;
case EncodingFormat.C:
break;
case EncodingFormat.BarToDecimal:
break;
default:
throw new ArgumentOutOfRangeException(nameof(format), format, null);
}
}
return sb.ToString();
}
}
}

70
BaseConversion.cs Normal file
View file

@ -0,0 +1,70 @@
using System;
using System.Collections.Generic;
using System.Linq;
namespace AusPostCode {
public static class BaseConversion {
// honestly surprised c# doesn't do this out of the box
private static readonly char[] Characters = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ".ToCharArray();
// thanks to https://stackoverflow.com/a/35004409
private static readonly Dictionary<char, int> CharacterIndices =
Characters.Select((c, i) => new {Char = c, Index = i}).ToDictionary(c => c.Char, c => c.Index);
public static string ToBase(int num, int numberBase) {
if (numberBase > Characters.Length) {
throw new ArgumentOutOfRangeException(
nameof(numberBase),
$"Base must be below {Characters.Length}"
);
}
if (Math.Abs(num) == 0) {
return num.ToString();
}
var digits = new List<char>();
var negative = num < 0;
while (num > 0) {
digits.Add(Characters[num % numberBase]);
num /= numberBase;
}
digits.Reverse();
return (negative ? "-" : "") + string.Join("", digits);
}
public static int FromBase(string num, int numberBase) {
if (numberBase > Characters.Length) {
throw new ArgumentOutOfRangeException(
nameof(numberBase),
$"Base must be below {Characters.Length}"
);
}
var negative = false;
if (num.StartsWith("-")) {
// it's a negative number
negative = true;
num = num.Substring(1);
}
var x = num.ToCharArray();
var result = 0;
// thanks to https://stackoverflow.com/a/35004409 again for this 0uo
for (var i = 0; i < x.Length; i++) {
result += CharacterIndices[x[i]] * (int) Math.Pow(numberBase, x.Length - i - 1);
}
if (negative) {
result *= -1;
}
return result;
}
}
}

2
Folder.DotSettings.user
View file

@ -1,2 +0,0 @@
<wpf:ResourceDictionary xml:space="preserve" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:s="clr-namespace:System;assembly=mscorlib" xmlns:ss="urn:shemas-jetbrains-com:settings-storage-xaml" xmlns:wpf="http://schemas.microsoft.com/winfx/2006/xaml/presentation">
<s:Boolean x:Key="/Default/UserDictionary/Words/=Lynnesbian/@EntryIndexedValue">True</s:Boolean></wpf:ResourceDictionary>

11
Program.cs
View file

@ -21,17 +21,16 @@ using CommandLine;
namespace AusPostCode {
internal class Program {
private static void Main(string[] args) {
Console.WriteLine("Hello World!");
const string testCode = "1301012112011202120020300110110322113";
var barcode = new Barcode(testCode);
}
public class Options {
[Option('d', "decode", Required = false,
HelpText = "Decode the text passed in, turning it into human readable information.")]
public bool Decode { get; set; }
}
private static void Main(string[] args) {
Console.WriteLine("Hello World!");
string testCode = "3111961842093257385431";
var barcode = new Barcode(testCode);
}
}
}