Generalize templates, Add post template

src/main/java/me/mrletsplay/mdblog/MdBlog.java

@@ -7,11 +7,11 @@ import java.nio.file.StandardWatchEventKinds;
 import java.nio.file.WatchKey;
 import java.nio.file.WatchService;
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.HashMap;
 import java.util.Iterator;
 import java.util.List;
 import java.util.Map;
-import java.util.Objects;
 import java.util.concurrent.TimeUnit;
 import java.util.stream.Collectors;
 
@@ -19,6 +19,8 @@ import me.mrletsplay.mdblog.blog.Post;
 import me.mrletsplay.mdblog.blog.PostMetadata;
 import me.mrletsplay.mdblog.markdown.MdParser;
 import me.mrletsplay.mdblog.markdown.MdRenderer;
+import me.mrletsplay.mdblog.template.Template;
+import me.mrletsplay.mdblog.template.Templates;
 import me.mrletsplay.mdblog.util.PostPath;
 import me.mrletsplay.mdblog.util.TimeFormatter;
 import me.mrletsplay.mrcore.http.HttpUtils;
@@ -35,22 +37,14 @@ public class MdBlog {
 		FILES_PATH = Path.of("files"),
 		POSTS_PATH = FILES_PATH.resolve("posts");
 
-	private static final String
-		INDEX_NAME = "index",
-		INDEX_POST_NAME = "index-post",
-		INDEX_SUB_BLOG_NAME = "index-sub-blog";
-
 	private static HttpServer server;
 	private static WatchService watchService;
 	private static List<WatchKey> watchedDirectories;
 	private static Map<PostPath, Post> posts;
-	private static Map<PostPath, String> indexTemplates;
+	private static Map<PostPath, Templates> indexTemplates;
 	private static Map<PostPath, FileDocument> globalResources;
 
-	private static String
-		defaultIndexTemplate,
-		defaultIndexSubBlogTemplate,
-		defaultIndexPostTemplate;
+	private static Templates defaultTemplates;
 
 	public static void main(String[] args) throws IOException {
 		server = new HttpServer(HttpServer.newConfigurationBuilder()
@@ -61,9 +55,10 @@ public class MdBlog {
 		server.getDocumentProvider().register(HttpRequestMethod.GET, "/", () -> createPostsIndex(PostPath.root()));
 		server.getDocumentProvider().registerPattern(HttpRequestMethod.GET, "/{path...}", () -> handleRequest(HttpRequestContext.getCurrentContext()));
 
-		defaultIndexTemplate = Files.readString(extract("template/index.md"));
-		defaultIndexPostTemplate = Files.readString(extract("template/index-post.md"));
-		defaultIndexSubBlogTemplate = Files.readString(extract("template/index-sub-blog.md"));
+		defaultTemplates = new Templates(null);
+		for(Template template : Template.values()) {
+			defaultTemplates.put(template, Files.readString(extract("template/" + template.getName() + ".md")));
+		}
 
 		server.start();
 
@@ -123,9 +118,7 @@ public class MdBlog {
 
 		String blogName = path.getName();
 
-		String indexTemplate = indexTemplates.getOrDefault(path.concat(PostPath.parse(INDEX_NAME)), defaultIndexTemplate);
-		String indexSubBlogTemplate = indexTemplates.getOrDefault(path.concat(PostPath.parse(INDEX_SUB_BLOG_NAME)), defaultIndexSubBlogTemplate);
-		String indexPostTemplate = indexTemplates.getOrDefault(path.concat(PostPath.parse(INDEX_POST_NAME)), defaultIndexPostTemplate);
+		Templates templates = indexTemplates.getOrDefault(path, defaultTemplates);
 
 		HtmlDocument index = new HtmlDocument();
 		index.setTitle("Index of " + blogName);
@@ -133,23 +126,19 @@ public class MdBlog {
 		index.addStyleSheet("_/style/base.css");
 		index.addStyleSheet("_/style/index.css");
 
-		String indexMd = indexTemplate;
-		indexMd = indexMd.replace("{name}", blogName);
-		indexMd = indexMd.replace("{sub_blogs}", directories.stream()
+		String indexMd = templates.render(Template.INDEX,
+			"name", blogName,
+			"sub_blogs", directories.stream()
 				.map(p -> {
-				String subBlogMd = indexSubBlogTemplate;
-
 					HtmlElement name = new HtmlElement("a");
 					name.setAttribute("href", p.toString());
 					name.setText(p.getName());
-				subBlogMd = subBlogMd.replace("{name}", name.toString());
-				return subBlogMd;
+					return templates.render(Template.INDEX_SUB_BLOG,
+						"name", name.toString());
 				})
-			.collect(Collectors.joining("\n\n")));
-
-		indexMd = indexMd.replace("{posts}", postsInDir.stream()
+				.collect(Collectors.joining("\n\n")),
+			"posts", postsInDir.stream()
 				.map(p -> {
-				String postMd = indexPostTemplate;
 					Post post = posts.get(path == null ? p : path.concat(p));
 					PostMetadata meta = post.getMetadata();
 					if(tag != null && !meta.tags().contains(tag)) return null;
@@ -157,13 +146,15 @@ public class MdBlog {
 					HtmlElement title = new HtmlElement("a");
 					title.setAttribute("href", p.toString());
 					title.setText(meta.title());
-				postMd = postMd.replace("{title}", title.toString());
 
-				postMd = postMd.replace("{author}", meta.author());
-				postMd = postMd.replace("{date}", TimeFormatter.toDateOnly(meta.date()));
-				postMd = postMd.replace("{date_time}", TimeFormatter.toDateAndTime(meta.date()));
-				postMd = postMd.replace("{date_relative}", TimeFormatter.toRelativeTime(meta.date()));
-				postMd = postMd.replace("{tags}", meta.tags().stream()
+					return templates.render(Template.INDEX_POST,
+						"title", title.toString(),
+						"author", meta.author(),
+						"date", TimeFormatter.toDateOnly(meta.date()),
+						"date_time", TimeFormatter.toDateAndTime(meta.date()),
+						"date_relative", TimeFormatter.toRelativeTime(meta.date()),
+						"description", meta.description(),
+						"tags", meta.tags().stream()
 							.map(t -> {
 								HtmlElement link = new HtmlElement("a");
 								link.setText(t);
@@ -171,10 +162,7 @@ public class MdBlog {
 								return link.toString();
 							})
 							.collect(Collectors.joining(", ")));
-				postMd = postMd.replace("{description}", meta.description());
-				return postMd;
 				})
-			.filter(Objects::nonNull)
 				.collect(Collectors.joining("\n\n")));
 
 		index.getBodyNode().appendChild(new MdRenderer().render(MdParser.parse(indexMd)));
@@ -200,6 +188,10 @@ public class MdBlog {
 		Post post = posts.get(path);
 
 		if(post != null) {
+			if(rawPath.endsWith("/")) {
+				ctx.redirect("../" + path.subPath(path.length() - 1));
+			}
+
 			post.getContent().createContent();
 			return;
 		}
@@ -237,6 +229,7 @@ public class MdBlog {
 	private static Path extract(String path) throws IOException {
 		Path filePath = FILES_PATH.resolve(path);
 		if(!Files.exists(filePath)) {
+			System.out.println("Extracting " + path);
 			Files.createDirectories(filePath.getParent());
 			Files.write(filePath, MdBlog.class.getResourceAsStream("/" + path).readAllBytes());
 		}
@@ -248,33 +241,43 @@ public class MdBlog {
 	}
 
 	private static void updateBlogs() throws IOException {
-		Iterator<Post> it = posts.values().iterator();
-		while(it.hasNext()) {
-			Post p = it.next();
-			if(!p.update()) it.remove();
-		}
-
+		System.out.println("Update");
 		indexTemplates.clear();
 
+		System.out.println(posts);
+
 		Files.walk(POSTS_PATH)
 			.filter(Files::isRegularFile)
 			.filter(f -> f.getFileName().toString().endsWith(Post.FILE_EXTENSION))
 			.filter(f -> posts.values().stream().noneMatch(p -> p.getFilePath().equals(f)))
 			.forEach(f -> {
 				try {
-					String postName = f.getFileName().toString();
-					postName = postName.substring(0, postName.length() - Post.FILE_EXTENSION.length());
+					String fullPostName = f.getFileName().toString();
+					String postName = fullPostName.substring(0, fullPostName.length() - Post.FILE_EXTENSION.length());
 					PostPath path = PostPath.of(POSTS_PATH.relativize(f).getParent(), postName);
 
-					if(INDEX_NAME.equals(postName) || INDEX_SUB_BLOG_NAME.equals(postName) || INDEX_POST_NAME.equals(postName)) {
+					Template template = Arrays.stream(Template.values())
+						.filter(t -> t.getName().equals(postName))
+						.findFirst().orElse(null);
+					if(template != null) {
 						// File is an index template, don't parse it as a post
-						indexTemplates.put(path, Files.readString(f, StandardCharsets.UTF_8));
+						indexTemplates.computeIfAbsent(path.getParent(), p -> new Templates(defaultTemplates)).put(template, Files.readString(f, StandardCharsets.UTF_8));
 						return;
 					}
 
 					posts.put(path, new Post(f));
 				} catch (IOException e) {}
 			});
+
+		Iterator<Map.Entry<PostPath, Post>> it = posts.entrySet().iterator();
+		while(it.hasNext()) {
+			Map.Entry<PostPath, Post> en = it.next();
+			PostPath path = en.getKey();
+			Post p = en.getValue();
+
+			Templates templates = indexTemplates.getOrDefault(path.getParent(), defaultTemplates);
+			if(!p.update(templates)) it.remove();
+		}
 	}
 
 	private static void watchFolders() throws IOException {

src/main/java/me/mrletsplay/mdblog/blog/Post.java

@@ -8,7 +8,9 @@ import java.security.NoSuchAlgorithmException;
 
 import me.mrletsplay.mdblog.markdown.MdParser;
 import me.mrletsplay.mdblog.markdown.MdRenderer;
-import me.mrletsplay.mrcore.misc.ByteUtils;
+import me.mrletsplay.mdblog.template.Template;
+import me.mrletsplay.mdblog.template.Templates;
+import me.mrletsplay.mdblog.util.TimeFormatter;
 import me.mrletsplay.simplehttpserver.dom.html.HtmlDocument;
 
 public class Post {
@@ -27,14 +29,12 @@ public class Post {
 	}
 
 	private Path filePath;
-	private String checksum;
+//	private String checksum; TODO currently unused, post also needs to update when templates change
 	private PostMetadata metadata;
 	private HtmlDocument content;
 
 	public Post(Path filePath) throws IOException {
 		this.filePath = filePath;
-		this.checksum = checksum(filePath);
-		load();
 	}
 
 	public Path getFilePath() {
@@ -54,7 +54,7 @@ public class Post {
 		return content;
 	}
 
-	private void load() throws IOException {
+	private void load(Templates templates) throws IOException {
 		String postData = Files.readString(filePath);
 		String[] spl = postData.split("\n---\n", 2);
 		if(spl.length != 2) throw new IOException("Invalid post file");
@@ -62,30 +62,37 @@ public class Post {
 		this.metadata = PostMetadata.load(spl[0]);
 
 		HtmlDocument document = new HtmlDocument();
-		document.getBodyNode().appendChild(RENDERER.render(MdParser.parse(spl[1])));
+		document.getBodyNode().appendChild(RENDERER.render(MdParser.parse(templates.render(Template.POST,
+			"content", spl[1],
+			"title", metadata.title(),
+			"author", metadata.author(),
+			"description", metadata.description(),
+			"date", TimeFormatter.toDateOnly(metadata.date()),
+			"date_time", TimeFormatter.toDateAndTime(metadata.date()),
+			"date_relative", TimeFormatter.toRelativeTime(metadata.date())))));
 		document.setTitle(metadata.title());
 		document.setDescription(metadata.description());
-		document.addStyleSheet("/_/style/base.css");
-		document.addStyleSheet("/_/style/post.css");
+		document.addStyleSheet("_/style/base.css");
+		document.addStyleSheet("_/style/post.css");
 		this.content = document;
 	}
 
-	public boolean update() {
+	public boolean update(Templates templates) {
 		if(!Files.exists(filePath)) return false;
 
 		try {
-			String newChecksum = checksum(filePath);
-			if(checksum.equals(newChecksum)) return true;
-			this.checksum = newChecksum;
-			load();
+			//String newChecksum = checksum(filePath);
+			//if(checksum != null && checksum.equals(newChecksum)) return true;
+			//this.checksum = newChecksum;
+			load(templates);
 			return true;
 		} catch (IOException e) {
 			return false;
 		}
 	}
 
-	private static String checksum(Path filePath) throws IOException {
-		return ByteUtils.bytesToHex(MD_5.digest(Files.readAllBytes(filePath)));
-	}
+//	private static String checksum(Path filePath) throws IOException {
+//		return ByteUtils.bytesToHex(MD_5.digest(Files.readAllBytes(filePath)));
+//	}
 
 }

src/main/java/me/mrletsplay/mdblog/template/Template.java

@@ -0,0 +1,21 @@
+package me.mrletsplay.mdblog.template;
+
+public enum Template {
+
+	INDEX("index"),
+	INDEX_POST("index-post"),
+	INDEX_SUB_BLOG("index-sub-blog"),
+	POST("post"),
+	;
+
+	private final String name;
+
+	private Template(String name) {
+		this.name = name;
+	}
+
+	public String getName() {
+		return name;
+	}
+
+}

src/main/java/me/mrletsplay/mdblog/template/Templates.java

@@ -0,0 +1,37 @@
+package me.mrletsplay.mdblog.template;
+
+import java.util.HashMap;
+import java.util.Map;
+
+public class Templates {
+
+	private Templates defaults;
+	private Map<Template, String> templates;
+
+	public Templates(Templates defaults) {
+		this.defaults = defaults;
+		this.templates = new HashMap<>();
+	}
+
+	public String get(Template template) {
+		return templates.getOrDefault(template, defaults == null ? null : defaults.get(template));
+	}
+
+	public void put(Template template, String templateContent) {
+		templates.put(template, templateContent);
+	}
+
+	public String render(Template template, String... variables) {
+		if(variables.length % 2 != 0) throw new IllegalArgumentException("Invalid number of arguments");
+
+		String content = get(template);
+
+		for(int i = 0; i < variables.length; i += 2) {
+			String variable = variables[i];
+			content = content.replace("{" + variable + "}", variables[i + 1]);
+		}
+
+		return content;
+	}
+
+}

src/main/resources/template/post.md

@@ -0,0 +1,6 @@
+# {title}
+by {author} {date_relative}
+
+{description}
+
+{content}