54 lines
1.1 KiB
Swift
54 lines
1.1 KiB
Swift
func toString(_ value: Any?) -> String? {
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if let value = value as? String {
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return value
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} else if let value = value as? CustomStringConvertible {
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return value.description
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}
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return nil
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}
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func capitalise(_ value: Any?) -> Any? {
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if let value = toString(value) {
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return value.capitalized
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}
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return value
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}
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func uppercase(_ value: Any?) -> Any? {
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if let value = toString(value) {
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return value.uppercased()
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}
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return value
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}
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func lowercase(_ value: Any?) -> Any? {
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if let value = toString(value) {
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return value.lowercased()
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}
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return value
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}
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func defaultFilter(value: Any?, arguments: [Any?]) -> Any? {
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return value ?? arguments.first as Any
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}
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func joinFilter(value: Any?, arguments: [Any?]) throws -> Any? {
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guard arguments.count == 1 else {
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throw TemplateSyntaxError("'join' filter takes a single argument")
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}
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guard let separator = arguments.first as? String else {
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throw TemplateSyntaxError("'join' filter takes a separator as string")
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}
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if let value = value as? [String] {
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return value.joined(separator: separator)
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}
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return nil
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}
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