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added filter to apply dynamic filter

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This commit is contained in:
Ilya Puchka
2018-03-22 23:14:30 +00:00
parent 39ed9aa753
commit 564ccb7af7
12 changed files with 129 additions and 70 deletions
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17
Sources/Filters.swift
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@@ -39,7 +39,7 @@ func defaultFilter(value: Any?, arguments: [Any?]) -> Any? {
func joinFilter(value: Any?, arguments: [Any?]) throws -> Any? {
guard arguments.count < 2 else {
throw TemplateSyntaxError("'join' filter takes a single argument")
throw TemplateSyntaxError("'join' filter takes at most one argument")
}
let separator = stringify(arguments.first ?? "")
@@ -55,7 +55,7 @@ func joinFilter(value: Any?, arguments: [Any?]) throws -> Any? {
func splitFilter(value: Any?, arguments: [Any?]) throws -> Any? {
guard arguments.count < 2 else {
throw TemplateSyntaxError("'split' filter takes a single argument")
throw TemplateSyntaxError("'split' filter takes at most one argument")
}
let separator = stringify(arguments.first ?? " ")
@@ -111,3 +111,16 @@ func indent(_ content: String, indentation: String, indentFirst: Bool) -> String
return result.joined(separator: "\n")
}
func filterFilter(value: Any?, arguments: [Any?], context: Context) throws -> Any? {
guard let value = value else { return nil }
guard arguments.count == 1 else {
throw TemplateSyntaxError("'filter' filter takes one argument")
}
let attribute = stringify(arguments[0])
let expr = try context.environment.compileFilter("$0|\(attribute)")
return try context.push(dictionary: ["$0": value]) {
try expr.resolve(context)
}
}