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Enhances TaxonomyField's token chaining.

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This commit is contained in:
Thierry Fleury
2015-07-24 17:35:41 +02:00
parent 9947f3973e
commit 75f3a618f0
1 changed files with 25 additions and 13 deletions
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38
src/Orchard.Web/Modules/Orchard.Taxonomies/Tokens/TaxonomyTokens.cs
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@@ -31,21 +31,33 @@ namespace Orchard.Taxonomies.Tokens {
context.For<TaxonomyField>("TaxonomyField")
.Token("Terms", field => String.Join(", ", field.Terms.Select(t => t.Name).ToArray()))
.Token(
token => {
var index = 0;
return (token.StartsWith("Terms:", StringComparison.OrdinalIgnoreCase) && int.TryParse(token.Substring("Terms:".Length), out index)) ? index.ToString() : null;
},
(token, t) => {
var index = Convert.ToInt32(token);
return index + 1 > t.Terms.Count() ? null : t.Terms.ElementAt(index).Name;
.Token(FilterTokenParam,
(index, field) => {
var term = field.Terms.ElementAtOrDefault(Convert.ToInt32(index));
return term != null ? term.Name : null;
})
// todo: extend Chain() in order to accept a filter like in Token() so that we can chain on an expression
.Chain("Terms:0", "Content", t => t.Terms.ElementAt(0))
.Chain("Terms:1", "Content", t => t.Terms.ElementAt(1))
.Chain("Terms:2", "Content", t => t.Terms.ElementAt(2))
.Chain("Terms:3", "Content", t => t.Terms.ElementAt(3))
.Chain(FilterChainParam, "Content", (index, field) => field.Terms.ElementAtOrDefault(Convert.ToInt32(index)))
;
}
private static string FilterTokenParam(string token) {
int index = 0;
return (token.StartsWith("Terms:", StringComparison.OrdinalIgnoreCase) && int.TryParse(token.Substring("Terms:".Length), out index)) ? index.ToString() : null;
}
private static Tuple<string, string> FilterChainParam(string token) {
int tokenLength = "Terms:".Length;
int index = 0;
int chainIndex = token.IndexOf('.');
if (!token.StartsWith("Terms:", StringComparison.OrdinalIgnoreCase) || chainIndex <= tokenLength)
return null;
if (int.TryParse(token.Substring(tokenLength, chainIndex - tokenLength), out index)) {
return new Tuple<string, string>(index.ToString(), token.Substring(chainIndex + 1));
}
else {
return null;
}
}
}
}