mirror of https://github.com/oliverbooth/X10D
Add selector parameter for key, value, or both (resolves #3)
Allows caller to specify a transformation to apply to key/value, presumably when either (or both) do not have an intended result of ToString
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@ -29,20 +29,90 @@ public static class DictionaryExtensions
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return string.Empty;
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}
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foreach (char character in value)
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{
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if (char.IsWhiteSpace(character))
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{
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return $"\"{value}\"";
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}
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}
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return value;
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return value.Contains(' ') ? $"\"{value}\"" : value;
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}
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static string GetQueryParameter(KeyValuePair<TKey, TValue> pair)
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{
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return $"{pair.Key}={SanitizeValue(pair.Value?.ToString())}");
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return $"{pair.Key}={SanitizeValue(pair.Value?.ToString())}";
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}
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return string.Join(';', source.Select(GetQueryParameter));
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}
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/// <summary>
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/// Converts an <see cref="IEnumerable{T}" /> of <see cref="KeyValuePair{TKey, TValue}" /> to an data connection
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/// string.
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/// </summary>
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/// <typeparam name="TKey">The type of the key element of the key/value pair.</typeparam>
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/// <typeparam name="TValue">The type of the value element of the key/value pair.</typeparam>
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/// <param name="source">The source dictionary.</param>
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/// <param name="selector">
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/// A transform function to apply to the <see cref="KeyValuePair{TKey,TValue}.Value" /> of each element.
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/// </param>
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/// <returns>A <see cref="string" /> representing the dictionary as a key=value set, concatenated with <c>;</c>.</returns>
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public static string ToConnectionString<TKey, TValue>(this IEnumerable<KeyValuePair<TKey, TValue>> source,
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Func<TValue, string?> selector)
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{
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if (source is null)
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{
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throw new ArgumentNullException(nameof(source));
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}
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static string SanitizeValue(string? value)
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{
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if (value is null)
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{
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return string.Empty;
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}
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return value.Contains(' ') ? $"\"{value}\"" : value;
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}
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string GetQueryParameter(KeyValuePair<TKey, TValue> pair)
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{
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return $"{pair.Key}={SanitizeValue(selector(pair.Value))}";
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}
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return string.Join(';', source.Select(GetQueryParameter));
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}
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/// <summary>
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/// Converts an <see cref="IEnumerable{T}" /> of <see cref="KeyValuePair{TKey, TValue}" /> to an data connection
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/// string.
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/// </summary>
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/// <typeparam name="TKey">The type of the key element of the key/value pair.</typeparam>
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/// <typeparam name="TValue">The type of the value element of the key/value pair.</typeparam>
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/// <param name="source">The source dictionary.</param>
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/// <param name="keySelector">
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/// A transform function to apply to the <see cref="KeyValuePair{TKey,TValue}.Key" /> of each element.
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/// </param>
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/// <param name="valueSelector">
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/// A transform function to apply to the <see cref="KeyValuePair{TKey,TValue}.Value" /> of each element.
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/// </param>
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/// <returns>A <see cref="string" /> representing the dictionary as a key=value set, concatenated with <c>;</c>.</returns>
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public static string ToConnectionString<TKey, TValue>(this IEnumerable<KeyValuePair<TKey, TValue>> source,
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Func<TKey, string> keySelector, Func<TValue, string?> valueSelector)
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where TKey : notnull
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{
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if (source is null)
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{
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throw new ArgumentNullException(nameof(source));
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}
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static string SanitizeValue(string? value)
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{
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if (value is null)
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{
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return string.Empty;
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}
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return value.Contains(' ') ? $"\"{value}\"" : value;
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}
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string GetQueryParameter(KeyValuePair<TKey, TValue> pair)
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{
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return $"{keySelector(pair.Key)}={SanitizeValue(valueSelector(pair.Value))}";
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}
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return string.Join(';', source.Select(GetQueryParameter));
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@ -72,4 +142,77 @@ public static class DictionaryExtensions
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return string.Join('&', source.Select(GetQueryParameter));
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}
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/// <summary>
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/// Converts an <see cref="IEnumerable{T}" /> of <see cref="KeyValuePair{TKey, TValue}" /> to a HTTP GET query string.
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/// </summary>
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/// <typeparam name="TKey">The type of the key element of the key/value pair.</typeparam>
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/// <typeparam name="TValue">The type of the value element of the key/value pair.</typeparam>
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/// <param name="source">The source dictionary.</param>
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/// <param name="selector">
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/// A transform function to apply to the <see cref="KeyValuePair{TKey,TValue}.Value" /> of each element.
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/// </param>
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/// <returns>A <see cref="string" /> representing the dictionary as a key=value set, concatenated with <c>&</c>.</returns>
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public static string ToGetParameters<TKey, TValue>(this IEnumerable<KeyValuePair<TKey, TValue>> source,
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Func<TValue, string?> selector)
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where TKey : notnull
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{
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if (source is null)
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{
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throw new ArgumentNullException(nameof(source));
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}
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if (selector is null)
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{
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throw new ArgumentNullException(nameof(selector));
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}
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// can't static here because of 'selector' parameter
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string GetQueryParameter(KeyValuePair<TKey, TValue> pair)
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{
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string key = HttpUtility.UrlEncode(pair.Key.ToString())!;
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string? value = HttpUtility.UrlEncode(selector(pair.Value));
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return $"{key}={value}";
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}
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return string.Join('&', source.Select(GetQueryParameter));
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}
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/// <summary>
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/// Converts an <see cref="IEnumerable{T}" /> of <see cref="KeyValuePair{TKey, TValue}" /> to a HTTP GET query string.
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/// </summary>
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/// <typeparam name="TKey">The type of the key element of the key/value pair.</typeparam>
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/// <typeparam name="TValue">The type of the value element of the key/value pair.</typeparam>
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/// <param name="source">The source dictionary.</param>
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/// <param name="keySelector">
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/// A transform function to apply to the <see cref="KeyValuePair{TKey,TValue}.Key" /> of each element.
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/// </param>
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/// <param name="valueSelector">
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/// A transform function to apply to the <see cref="KeyValuePair{TKey,TValue}.Value" /> of each element.
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/// </param>
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/// <returns>A <see cref="string" /> representing the dictionary as a key=value set, concatenated with <c>&</c>.</returns>
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public static string ToGetParameters<TKey, TValue>(this IEnumerable<KeyValuePair<TKey, TValue>> source,
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Func<TKey, string> keySelector, Func<TValue, string?> valueSelector)
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where TKey : notnull
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{
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if (source is null)
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{
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throw new ArgumentNullException(nameof(source));
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}
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if (valueSelector is null)
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{
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throw new ArgumentNullException(nameof(valueSelector));
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}
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// can't static here because of selector parameters
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string GetQueryParameter(KeyValuePair<TKey, TValue> pair)
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{
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string key = HttpUtility.UrlEncode(keySelector(pair.Key));
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string? value = HttpUtility.UrlEncode(valueSelector(pair.Value));
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return $"{key}={value}";
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}
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return string.Join('&', source.Select(GetQueryParameter));
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}
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}
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