84 lines
2.9 KiB
Swift
84 lines
2.9 KiB
Swift
import Foundation
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import PathKit
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#if os(Linux)
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// swiftlint:disable:next prefixed_toplevel_constant
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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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open class Template: ExpressibleByStringLiteral {
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let templateString: String
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var environment: Environment
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/// The list of parsed (lexed) tokens
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public 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 required 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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self.templateString = templateString
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let lexer = Lexer(templateName: name, 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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@available(*, deprecated, message: "Use Environment/FileSystemLoader instead")
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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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@available(*, deprecated, message: "Use Environment/FileSystemLoader instead")
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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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@available(*, deprecated, message: "Use Environment/FileSystemLoader instead")
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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 required convenience 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 required convenience 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 required convenience 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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public func render(_ context: Context) throws -> String {
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let context = context
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let parser = TokenParser(tokens: tokens, environment: context.environment)
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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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// swiftlint:disable discouraged_optional_collection
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/// Render the given template
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open func render(_ dictionary: [String: Any]? = nil) throws -> String {
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try render(Context(dictionary: dictionary ?? [:], environment: environment))
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}
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}
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