www: render help from markdown

4 files changed, 55 insertions, 17 deletions

diff --git a/juick-www/src/main/java/com/juick/www/HelpService.java b/juick-www/src/main/java/com/juick/www/HelpService.java
index e588cd50..8e56916f 100644
--- a/juick-www/src/main/java/com/juick/www/HelpService.java
+++ b/juick-www/src/main/java/com/juick/www/HelpService.java
@@ -44,7 +44,7 @@ public class HelpService {
     @Cacheable("help")
     public String getHelp(final String page, final String lang) {
         if (canBePage(page) && canBeLang(lang)) {
-            String path = StringUtils.joinWith("/", helpPath, lang, page);
+            String path = StringUtils.joinWith("/", helpPath, lang, page + ".md");
 
             try (InputStream is = Thread.currentThread().getContextClassLoader().getResourceAsStream(path)) {
                 if (is != null)
@@ -62,4 +62,8 @@ public class HelpService {
     public boolean canBeLang(final String anything) {
         return anything != null && LANG_PATTERN.matcher(anything).matches();
     }
+
+    public String getHelpPath() {
+        return helpPath;
+    }
 }
diff --git a/juick-www/src/main/java/com/juick/www/configuration/WwwAppConfiguration.java b/juick-www/src/main/java/com/juick/www/configuration/WwwAppConfiguration.java
index 3198df2d..d79ae636 100644
--- a/juick-www/src/main/java/com/juick/www/configuration/WwwAppConfiguration.java
+++ b/juick-www/src/main/java/com/juick/www/configuration/WwwAppConfiguration.java
@@ -24,6 +24,10 @@ import com.juick.service.UserService;
 import com.juick.www.HelpService;
 import com.juick.www.WebApp;
 import org.apache.commons.io.IOUtils;
+import org.commonmark.ext.autolink.AutolinkExtension;
+import org.commonmark.node.Link;
+import org.commonmark.parser.Parser;
+import org.commonmark.renderer.html.HtmlRenderer;
 import org.springframework.cache.annotation.EnableCaching;
 import org.springframework.cache.caffeine.CaffeineCacheManager;
 import org.springframework.context.annotation.Bean;
@@ -33,6 +37,7 @@ import org.springframework.context.annotation.PropertySource;
 import javax.inject.Inject;
 import java.io.IOException;
 import java.nio.charset.StandardCharsets;
+import java.util.Collections;
 import java.util.HashMap;
 
 /**
@@ -69,4 +74,24 @@ public class WwwAppConfiguration {
         return new HelpService("help");
     }
 
+    @Bean
+    public Parser cmParser() {
+        return Parser.builder().extensions(Collections.singletonList(AutolinkExtension.create())).build();
+    }
+    @Bean
+    public HtmlRenderer helpRenderer() {
+        return HtmlRenderer.builder()
+                .attributeProviderFactory(context -> (node, tagName, attributes) -> {
+                    if (node instanceof Link) {
+                        Link link = (Link) node;
+                        if (link.getDestination().startsWith("/")) {
+                            String destination = "/" + helpService().getHelpPath() + link.getDestination();
+                            link.setDestination(destination);
+                            attributes.put("href", destination);
+                        }
+                    }
+                })
+                .build();
+    }
+
 }
diff --git a/juick-www/src/main/java/com/juick/www/configuration/WwwServletConfiguration.java b/juick-www/src/main/java/com/juick/www/configuration/WwwServletConfiguration.java
index 814eb8e4..1e684fa6 100644
--- a/juick-www/src/main/java/com/juick/www/configuration/WwwServletConfiguration.java
+++ b/juick-www/src/main/java/com/juick/www/configuration/WwwServletConfiguration.java
@@ -24,6 +24,15 @@ import com.mitchellbosecke.pebble.loader.ServletLoader;
 import com.mitchellbosecke.pebble.spring4.PebbleViewResolver;
 import com.mitchellbosecke.pebble.spring4.extension.SpringExtension;
 import org.apache.commons.codec.CharEncoding;
+import org.commonmark.ext.autolink.AutolinkExtension;
+import org.commonmark.node.Image;
+import org.commonmark.node.Link;
+import org.commonmark.node.Node;
+import org.commonmark.parser.Parser;
+import org.commonmark.renderer.html.AttributeProvider;
+import org.commonmark.renderer.html.AttributeProviderContext;
+import org.commonmark.renderer.html.AttributeProviderFactory;
+import org.commonmark.renderer.html.HtmlRenderer;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.ComponentScan;
 import org.springframework.context.annotation.Configuration;
@@ -37,6 +46,9 @@ import org.springframework.web.servlet.resource.PathResourceResolver;
 
 import javax.inject.Inject;
 import javax.servlet.ServletContext;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.Map;
 import java.util.concurrent.TimeUnit;
 
 /**
diff --git a/juick-www/src/main/java/com/juick/www/controllers/Help.java b/juick-www/src/main/java/com/juick/www/controllers/Help.java
index 4198b23a..335f4b7a 100644
--- a/juick-www/src/main/java/com/juick/www/controllers/Help.java
+++ b/juick-www/src/main/java/com/juick/www/controllers/Help.java
@@ -18,23 +18,22 @@
 package com.juick.www.controllers;
 
 import com.juick.server.util.HttpNotFoundException;
-import com.juick.service.MessagesService;
 import com.juick.server.util.UserUtils;
+import com.juick.service.MessagesService;
 import com.juick.www.HelpService;
 import com.juick.www.WebApp;
+import org.commonmark.parser.Parser;
+import org.commonmark.renderer.html.HtmlRenderer;
 import org.springframework.stereotype.Controller;
 import org.springframework.ui.Model;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.PathVariable;
 
 import javax.inject.Inject;
-import javax.servlet.http.HttpServletRequest;
-import javax.servlet.http.HttpServletResponse;
 import java.io.IOException;
 import java.net.URISyntaxException;
 import java.util.Locale;
 import java.util.Objects;
-import java.util.Optional;
 
 /**
  * Created by aalexeev on 11/21/16.
@@ -47,25 +46,23 @@ public class Help {
     private MessagesService messagesService;
     @Inject
     private WebApp webApp;
+    @Inject
+    private Parser cmParser;
+    @Inject
+    private HtmlRenderer helpRenderer;
 
     @GetMapping({"/help/", "/help", "/help/{langOrPage}", "/help/{lang}/{page}"})
     public String showHelp(
-            HttpServletRequest request,
-            HttpServletResponse response,
             Locale locale,
-            @PathVariable("lang") Optional<String> langParam,
-            @PathVariable("page") Optional<String> pageParam,
-            @PathVariable("langOrPage") Optional<String> langOrPageParam,
+            @PathVariable(required = false, name = "lang") String lang,
+            @PathVariable(required = false, name = "page") String page,
+            @PathVariable(required = false, name = "langOrPage") String langOrPage,
             Model model) throws IOException, URISyntaxException {
         com.juick.User visitor = UserUtils.getCurrentUser();
-        String page = pageParam.orElse("index");
-        String lang = langParam.orElse(locale.getLanguage());
 
         String navigation = null;
 
-        if (langOrPageParam.isPresent()) {
-            String langOrPage = langOrPageParam.get();
-
+        if (langOrPage != null) {
             if (helpService.canBeLang(langOrPage)) {
                 navigation = helpService.getHelp("navigation", langOrPage);
                 if (navigation != null)
@@ -86,8 +83,8 @@ public class Help {
         if (content == null || navigation == null)
             throw new HttpNotFoundException();
 
-        model.addAttribute("navigation", navigation);
-        model.addAttribute("content", content);
+        model.addAttribute("navigation", helpRenderer.render(cmParser.parse(navigation)));
+        model.addAttribute("content", helpRenderer.render(cmParser.parse(content)));
         model.addAttribute("visitor", visitor);
 
         return "views/help";