64 lines
1.1 KiB
Swift
64 lines
1.1 KiB
Swift
func toString(_ value: Any?) -> String? {
|
|
if let value = value as? String {
|
|
return value
|
|
} else if let value = value as? CustomStringConvertible {
|
|
return value.description
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func capitalise(_ value: Any?) -> Any? {
|
|
if let value = toString(value) {
|
|
return value.capitalized
|
|
}
|
|
|
|
return value
|
|
}
|
|
|
|
func uppercase(_ value: Any?) -> Any? {
|
|
if let value = toString(value) {
|
|
return value.uppercased()
|
|
}
|
|
|
|
return value
|
|
}
|
|
|
|
func lowercase(_ value: Any?) -> Any? {
|
|
if let value = toString(value) {
|
|
return value.lowercased()
|
|
}
|
|
|
|
return value
|
|
}
|
|
|
|
func defaultFilter(value: Any?, arguments: [Any?]) -> Any? {
|
|
if let value = value {
|
|
return value
|
|
}
|
|
|
|
for argument in arguments {
|
|
if let argument = argument {
|
|
return argument
|
|
}
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func joinFilter(value: Any?, arguments: [Any?]) throws -> Any? {
|
|
guard arguments.count < 2 else {
|
|
throw TemplateSyntaxError("'join' filter takes a single argument")
|
|
}
|
|
|
|
let separator = stringify(arguments.first ?? "")
|
|
|
|
if let value = value as? [Any] {
|
|
return value
|
|
.map(stringify)
|
|
.joined(separator: separator)
|
|
}
|
|
|
|
return value
|
|
}
|