75 lines
2.5 KiB
Swift
75 lines
2.5 KiB
Swift
import Foundation
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import PathKit
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#if os(Linux)
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let NSFileNoSuchFileError = 4
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#endif
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/// A class representing a template
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public class Template: ExpressibleByStringLiteral {
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let environment: Environment
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let tokens: [Token]
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/// The name of the loaded Template if the Template was loaded from a Loader
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public let name: String?
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/// Create a template with a template string
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public init(templateString: String, environment: Environment? = nil, name: String? = nil) {
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self.environment = environment ?? Environment()
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self.name = name
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let lexer = Lexer(templateString: templateString)
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tokens = lexer.tokenize()
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}
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/// Create a template with the given name inside the given bundle
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public convenience init(named:String, inBundle bundle:Bundle? = nil) throws {
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let useBundle = bundle ?? Bundle.main
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guard let url = useBundle.url(forResource: named, withExtension: nil) else {
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throw NSError(domain: NSCocoaErrorDomain, code: NSFileNoSuchFileError, userInfo: nil)
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}
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try self.init(URL:url)
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}
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/// Create a template with a file found at the given URL
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public convenience init(URL:Foundation.URL) throws {
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try self.init(path: Path(URL.path))
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}
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/// Create a template with a file found at the given path
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public convenience init(path: Path, environment: Environment? = nil, name: String? = nil) throws {
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self.init(templateString: try path.read(), environment: environment, name: name)
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}
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// MARK: ExpressibleByStringLiteral
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// Create a templaVte with a template string literal
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public convenience required init(stringLiteral value: String) {
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self.init(templateString: value)
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}
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// Create a template with a template string literal
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public convenience required init(extendedGraphemeClusterLiteral value: StringLiteralType) {
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self.init(stringLiteral: value)
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}
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// Create a template with a template string literal
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public convenience required init(unicodeScalarLiteral value: StringLiteralType) {
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self.init(stringLiteral: value)
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}
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/// Render the given template with a context
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func render(_ context: Context) throws -> String {
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let context = context ?? Context(environment: environment)
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let parser = TokenParser(tokens: tokens, namespace: context.namespace)
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let nodes = try parser.parse()
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return try renderNodes(nodes, context)
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}
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/// Render the given template
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public func render(_ dictionary: [String: Any]? = nil) throws -> String {
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return try render(Context(dictionary: dictionary, environment: environment))
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}
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}
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