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using System;
using System.Collections.Generic;
using System.Globalization;
using System.Net.Mail;
using System.Text;
using System.Linq;
namespace Kaleida.ServiceMonitor.Framework
{
public static class StringExtensions
{
public static TimeSpan ToTimeSpan(this string text)
{
if (text == null) throw new ArgumentNullException("text");
return DurationParser.ParseTimeSpan(text);
}
public static Duration ToDuration(this string text)
{
if (text == null) throw new ArgumentNullException("text");
return DurationParser.ParseDuration(text);
}
public static TimeSpan ToTimeSpan(this Duration duration)
{
if (duration == null) throw new ArgumentNullException("duration");
return duration.ToString().ToTimeSpan();
}
public static bool IsTimeSpan(this string text)
{
if (text == null) throw new ArgumentNullException("text");
return DurationParser.CanParse(text);
}
public static bool IsDuration(this string text)
{
if (text == null) throw new ArgumentNullException("text");
return DurationParser.CanParse(text);
}
public static bool IsDecimal(this string value)
{
if (value == null) throw new ArgumentNullException("value");
decimal result;
return decimal.TryParse(value, out result);
}
public static bool IsInteger(this string value)
{
if (value == null) throw new ArgumentNullException("value");
int result;
return int.TryParse(value, out result);
}
public static ScheduledTime ToScheduledTime(this string value)
{
if (value == null) throw new ArgumentNullException("value");
var components = value.Split(':');
if(components.Count() != 2)
throw new FormatException(string.Format("Cannot parse '{0}' as a ScheduledTime. Expected string to be in HH:MM format. E.g. 09:32", value));
int hour;
if (!int.TryParse(components[0], out hour))
throw new FormatException(string.Format("Cannot parse '{0}' as a ScheduledTime. Expected hour to be a number", value));
int minute;
if (!int.TryParse(components[1], out minute))
throw new FormatException(string.Format("Cannot parse '{0}' as a ScheduledTime. Expected minute to be a number", value));
return new ScheduledTime(hour, minute);
}
public static string SurroundWith(this string text, string enclosingText)
{
if (text == null) throw new ArgumentNullException("text");
if (enclosingText == null) throw new ArgumentNullException("enclosingText");
return enclosingText + text + enclosingText;
}
public static string ToFormattedString(this string text)
{
if (text == null) throw new ArgumentNullException("text");
return text.SurroundWith("'");
}
public static string ToFormattedString(this int text)
{
return text.ToString(CultureInfo.InvariantCulture);
}
public static string ToFormattedString(this decimal text)
{
return text.ToString(CultureInfo.InvariantCulture);
}
public static string ToFormattedString(this TimeSpan timeSpan)
{
var duration = timeSpan.Duration();
var formatted = new StringBuilder();
if(timeSpan.Ticks < 0)
formatted.Append("-");
formatted.Append("[");
if(duration.Days != 0)
formatted.AppendFormat("{0} ", duration.Days);
formatted.AppendFormat("{0:00}:{1:00}:{2:00}", duration.Hours, duration.Minutes, duration.Seconds);
if (duration.Milliseconds != 0)
formatted.AppendFormat(".{0:000}", duration.Milliseconds);
formatted.Append("]");
return formatted.ToString();
}
public static List<KeyValuePair<string, string>> SplitIntoKeyValuePairs(this string argumentsString)
{
if (argumentsString == null) throw new ArgumentNullException("argumentsString");
if (argumentsString == "")
return new List<KeyValuePair<string, string>>();
var argumentStrings = argumentsString.Split(',');
return argumentStrings.Select(BuildKeyValuePair).ToList();
}
public static IList<MailAddress> ToMailAddressList(this string text)
{
if (text == null) throw new ArgumentNullException("text");
var emailAddresses = text.Split(';').Select(i => i.Trim()).Where(i => i != "").ToList();
if (!emailAddresses.Any())
throw new InvalidOperationException("Must provide at least one email address (multiple addresses can be specified using a semicolon. e.g. \"me@example.com;someone@example.com\")");
return emailAddresses.Select(BuildMailAddress).ToList();
}
private static MailAddress BuildMailAddress(string text)
{
try
{
return new MailAddress(text);
}
catch (FormatException e)
{
throw new InvalidOperationException(e.Message + " (multiple addresses can be specified using a semicolon. e.g. \"me@example.com;someone@example.com\")");
}
}
public static IList<ScheduledTime> ToScheduledTimeList(this string text)
{
if (text == null) throw new ArgumentNullException("text");
var timeStrings = text.Split(';').Select(i => i.Trim()).Where(i => i != "").ToList();
if (!timeStrings.Any())
throw new InvalidOperationException("Must provide at least one scheduled time (multiple addresses can be specified using a semicolon. e.g. \"14:30; 17:15\")");
return timeStrings.Select(BuildScheduledTime).ToList();
}
private static ScheduledTime BuildScheduledTime(string text)
{
try
{
return text.ToScheduledTime();
}
catch (FormatException e)
{
throw new InvalidOperationException(e.Message + " (multiple times can be specified using a semicolon. e.g. \"14:30; 17:15\")");
}
}
private static KeyValuePair<string, string> BuildKeyValuePair(string argumentString)
{
var components = argumentString.Split('=');
if (components.Length != 2)
throw new InvalidOperationException(String.Format("Expected argument '{0}' to be specified as ARG=VAL", argumentString));
return new KeyValuePair<string, string>(components[0], components[1]);
}
}
}
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Stuart Wheelwright is the Principal Architect and Software Developer at
BlackJet Software Ltd.
He has over 16 years commercial experience producing robust, maintainable, web-based solutions and bespoke systems for Microsoft platforms.
His latest project is
Shopping UK, an elegantly simple shopping list for iPhone.