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Load templates and render objects

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This commit is contained in:
Adam Fowler
2021-03-11 16:58:49 +00:00
parent 98f5d19e91
commit 9cbe74f9ee
10 changed files with 1036 additions and 98 deletions
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117
Sources/HummingbirdMustache/Template+Render.swift Normal file
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extension HBTemplate {
public func render(_ object: Any) -> String {
var string = ""
for token in tokens {
switch token {
case .text(let text):
string += text
case .variable(let variable):
if let child = getChild(named: variable, from: object) {
string += String(describing: child)
}
case .section(let variable, let template):
let child = getChild(named: variable, from: object)
string += renderSection(child, with: template)
case .invertedSection(let variable, let template):
let child = getChild(named: variable, from: object)
string += renderInvertedSection(child, with: template)
}
}
return string
}
func renderSection(_ object: Any?, with template: HBTemplate) -> String {
switch object {
case let array as HBSequence:
return array.renderSection(with: template)
case let bool as Bool:
return bool ? template.render(true) : ""
case let int as Int:
return int != 0 ? template.render(int) : ""
case let int as Int8:
return int != 0 ? template.render(int) : ""
case let int as Int16:
return int != 0 ? template.render(int) : ""
case let int as Int32:
return int != 0 ? template.render(int) : ""
case let int as Int64:
return int != 0 ? template.render(int) : ""
case let int as UInt:
return int != 0 ? template.render(int) : ""
case let int as UInt8:
return int != 0 ? template.render(int) : ""
case let int as UInt16:
return int != 0 ? template.render(int) : ""
case let int as UInt32:
return int != 0 ? template.render(int) : ""
case let int as UInt64:
return int != 0 ? template.render(int) : ""
case .some(let value):
return template.render(value)
case .none:
return ""
}
}
func renderInvertedSection(_ object: Any?, with template: HBTemplate) -> String {
switch object {
case let array as HBSequence:
return array.renderInvertedSection(with: template)
case let bool as Bool:
return bool ? "" : template.render(true)
case let int as Int:
return int == 0 ? template.render(int) : ""
case let int as Int8:
return int == 0 ? template.render(int) : ""
case let int as Int16:
return int == 0 ? template.render(int) : ""
case let int as Int32:
return int == 0 ? template.render(int) : ""
case let int as Int64:
return int == 0 ? template.render(int) : ""
case let int as UInt:
return int == 0 ? template.render(int) : ""
case let int as UInt8:
return int == 0 ? template.render(int) : ""
case let int as UInt16:
return int == 0 ? template.render(int) : ""
case let int as UInt32:
return int == 0 ? template.render(int) : ""
case let int as UInt64:
return int == 0 ? template.render(int) : ""
case .some:
return ""
case .none:
return template.render(Void())
}
}
func getChild(named name: String, from: Any) -> Any? {
if name == "." { return from }
if let customBox = from as? HBMustacheParent {
return customBox.child(named: name)
}
let mirror = Mirror(reflecting: from)
return mirror.getAttribute(forKey: name)
}
}
func unwrap(_ any: Any) -> Any? {
let mirror = Mirror(reflecting: any)
guard mirror.displayStyle == .optional else { return any }
guard let first = mirror.children.first else { return nil }
return first.value
}
extension Mirror {
func getAttribute(forKey key: String) -> Any? {
guard let matched = children.filter({ $0.label == key }).first else {
return nil
}
return unwrap(matched.value)
}
}