Initial commit

.gitignore

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+target
+*.class
+*.iml
+*.ipr
+.idea
+.classpath
+.settings
+.project
+.DS_Store

pom.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <groupId>com.develogical</groupId>
+    <version>1.0-SNAPSHOT</version>
+    <artifactId>SimpleWebApp</artifactId>
+    <dependencies>
+        <dependency>
+            <groupId>org.eclipse.jetty</groupId>
+            <artifactId>jetty-servlet</artifactId>
+            <version>9.2.14.v20151106</version>
+        </dependency>
+        <dependency>
+            <groupId>javax.servlet</groupId>
+            <artifactId>servlet-api</artifactId>
+            <version>2.5</version>
+        </dependency>
+        <dependency>
+            <groupId>junit</groupId>
+            <artifactId>junit</artifactId>
+            <version>4.12</version>
+        </dependency>
+    </dependencies>
+    <build>
+        <plugins>
+            <plugin>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.3</version>
+                <configuration>
+                    <source>1.7</source>
+                    <target>1.7</target>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+</project>

src/main/java/com/develogical/WebServer.java

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+package com.develogical;
+
+import com.develogical.app.QueryProcessor;
+import com.develogical.web.ApiResponse;
+import com.develogical.web.IndexPage;
+import com.develogical.web.ResultsPage;
+import org.eclipse.jetty.server.Server;
+import org.eclipse.jetty.servlet.ServletHandler;
+import org.eclipse.jetty.servlet.ServletHolder;
+
+import javax.servlet.ServletException;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import java.io.IOException;
+
+public class WebServer {
+
+    public WebServer() throws Exception {
+        Server server = new Server(8080);
+
+        ServletHandler handler = new ServletHandler();
+        handler.addServletWithMapping(new ServletHolder(new Website()), "/*");
+        handler.addServletWithMapping(new ServletHolder(new Api()), "/api/*");
+        server.setHandler(handler);
+
+        server.start();
+    }
+
+    static class Website extends HttpServlet {
+        @Override
+        protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
+            String query = req.getParameter("q");
+            if (query == null) {
+                new IndexPage().writeTo(resp);
+            } else {
+                new ResultsPage(query, new QueryProcessor().process(query)).writeTo(resp);
+            }
+        }
+    }
+
+    static class Api extends HttpServlet {
+        @Override
+        protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
+            String query = req.getParameter("q");
+            new ApiResponse(new QueryProcessor().process(query)).writeTo(resp);
+        }
+    }
+
+    public static void main(String[] args) throws Exception {
+        new WebServer();
+    }
+}
+

src/main/java/com/develogical/app/QueryProcessor.java

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+package com.develogical.app;
+
+public class QueryProcessor {
+
+    public String process(String query) {
+        if (query.toLowerCase().contains("shakespeare")) {
+            return "William Shakespeare (26 April 1564 - 23 April 1616) was an " +
+                    "English poet, playwright, and actor, widely regarded as the greatest " +
+                    "writer in the English language and the world's pre-eminent dramatist.";
+        }
+        return "";
+    }
+}

src/main/java/com/develogical/web/ApiResponse.java

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+package com.develogical.web;
+
+import javax.servlet.http.HttpServletResponse;
+import java.io.IOException;
+import java.io.PrintWriter;
+
+public class ApiResponse {
+
+    private final String answer;
+
+    public ApiResponse(String answer) {
+        this.answer = answer;
+    }
+
+    public void writeTo(HttpServletResponse resp) throws IOException {
+        resp.setContentType("text/plain");
+        PrintWriter writer = resp.getWriter();
+        writer.println(answer);
+    }
+}

src/main/java/com/develogical/web/HtmlPage.java

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+package com.develogical.web;
+
+import javax.servlet.http.HttpServletResponse;
+import java.io.IOException;
+import java.io.PrintWriter;
+
+public abstract class HtmlPage {
+
+    public void writeTo(HttpServletResponse resp) throws IOException {
+        resp.setContentType("text/html");
+        PrintWriter writer = resp.getWriter();
+        writeHeaderTo(writer);
+        writeContentTo(writer);
+        writeFooterTo(writer);
+    }
+
+    private void writeHeaderTo(PrintWriter writer) {
+        writer.println("<html>");
+        writer.println("<head></head>");
+        writer.println("<body>");
+    }
+
+    private void writeFooterTo(PrintWriter writer) {
+        writer.println("</body>");
+        writer.println("</html>");
+    }
+
+    protected abstract void writeContentTo(PrintWriter writer);
+
+}

src/main/java/com/develogical/web/IndexPage.java

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+package com.develogical.web;
+
+import java.io.PrintWriter;
+
+public class IndexPage extends HtmlPage {
+
+    @Override
+    protected void writeContentTo(PrintWriter writer) {
+        writer.println(
+                "<h1>Welcome!</h1>" +
+                "<p>Enter your query in the box below: " +
+                  "<form><input type=\"text\" name=\"q\" />" +
+                    "<input type=\"submit\">" +
+                  "</form>" +
+                "</p>");
+    }
+
+}

src/main/java/com/develogical/web/ResultsPage.java

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+package com.develogical.web;
+
+import java.io.PrintWriter;
+
+public class ResultsPage extends HtmlPage {
+
+    private final String query;
+    private final String answer;
+
+    public ResultsPage(String query, String answer) {
+        this.query = query;
+        this.answer = answer;
+    }
+
+    @Override
+    protected void writeContentTo(PrintWriter writer) {
+
+        if (answer == null || answer.isEmpty()) {
+            writer.println("<h1>Sorry</h1>");
+            writer.print("<p>Sorry, we didn't understand <em>" + query + "</em></p>");
+        } else {
+            writer.println("<h1>" + query + "</h1>");
+            writer.println("<p>" + answer + "</p>");
+        }
+
+        writer.println("<p><a href=\"/\">Back to Search Page</a></p>");
+    }
+}

src/test/java/com/develogical/app/QueryProcessorTest.java

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+package com.develogical.app;
+
+import org.junit.Test;
+
+import static org.hamcrest.CoreMatchers.containsString;
+import static org.hamcrest.CoreMatchers.is;
+import static org.junit.Assert.assertThat;
+
+public class QueryProcessorTest {
+
+    QueryProcessor queryProcessor = new QueryProcessor();
+
+    @Test
+    public void returnsEmptyStringIfCannotProcessQuery() throws Exception {
+        assertThat(queryProcessor.process("test"), is(""));
+    }
+
+    @Test
+    public void knowsAboutShakespeare() throws Exception {
+        assertThat(queryProcessor.process("Shakespeare"), containsString("playwright"));
+    }
+
+    @Test
+    public void isNotCaseSensitive() throws Exception {
+        assertThat(queryProcessor.process("shakespeare"), containsString("playwright"));
+    }
+}