Rename package to swift-mustache (#27)

* Rename package to swift-mustache

* Update CI

Sources/Mustache/Library.swift

@@ -0,0 +1,92 @@
+//===----------------------------------------------------------------------===//
+//
+// This source file is part of the Hummingbird server framework project
+//
+// Copyright (c) 2021-2021 the Hummingbird authors
+// Licensed under Apache License v2.0
+//
+// See LICENSE.txt for license information
+// See hummingbird/CONTRIBUTORS.txt for the list of Hummingbird authors
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+//===----------------------------------------------------------------------===//
+
+/// Class holding a collection of mustache templates.
+///
+/// Each template can reference the others via a partial using the name the template is registered under
+/// ```
+/// {{#sequence}}{{>entry}}{{/sequence}}
+/// ```
+public struct MustacheLibrary: Sendable {
+    /// Initialize empty library
+    public init() {
+        self.templates = [:]
+    }
+
+    /// Initialize library with contents of folder.
+    ///
+    /// Each template is registered with the name of the file minus its extension. The search through
+    /// the folder is recursive and templates in subfolders will be registered with the name `subfolder/template`.
+    /// - Parameter directory: Directory to look for mustache templates
+    /// - Parameter extension: Extension of files to look for
+    public init(templates: [String: MustacheTemplate]) {
+        self.templates = templates
+    }
+
+    /// Initialize library with contents of folder.
+    ///
+    /// Each template is registered with the name of the file minus its extension. The search through
+    /// the folder is recursive and templates in subfolders will be registered with the name `subfolder/template`.
+    /// - Parameter directory: Directory to look for mustache templates
+    /// - Parameter extension: Extension of files to look for
+    public init(directory: String, withExtension extension: String = "mustache") async throws {
+        self.templates = try await Self.loadTemplates(from: directory, withExtension: `extension`)
+    }
+
+    /// Register template under name
+    /// - Parameters:
+    ///   - template: Template
+    ///   - name: Name of template
+    public mutating func register(_ template: MustacheTemplate, named name: String) {
+        self.templates[name] = template
+    }
+
+    /// Register template under name
+    /// - Parameters:
+    ///   - mustache: Mustache text
+    ///   - name: Name of template
+    public mutating func register(_ mustache: String, named name: String) throws {
+        let template = try MustacheTemplate(string: mustache)
+        self.templates[name] = template
+    }
+
+    /// Return template registed with name
+    /// - Parameter name: name to search for
+    /// - Returns: Template
+    public func getTemplate(named name: String) -> MustacheTemplate? {
+        self.templates[name]
+    }
+
+    /// Render object using templated with name
+    /// - Parameters:
+    ///   - object: Object to render
+    ///   - name: Name of template
+    /// - Returns: Rendered text
+    public func render(_ object: Any, withTemplate name: String) -> String? {
+        guard let template = templates[name] else { return nil }
+        return template.render(object, library: self)
+    }
+
+    /// Error returned by init() when parser fails
+    public struct ParserError: Swift.Error {
+        /// File error occurred in
+        public let filename: String
+        /// Context (line, linenumber and column number)
+        public let context: MustacheParserContext
+        /// Actual error that occurred
+        public let error: Error
+    }
+
+    private var templates: [String: MustacheTemplate]
+}