7: Create Formatters

build.gradle

@@ -6,7 +6,7 @@ plugins {
 group 'com.bartek'
 version '1.0-SNAPSHOT'
 
-sourceCompatibility = 1.8
+sourceCompatibility = 1.12
 
 repositories {
     mavenCentral()
@@ -22,6 +22,8 @@ dependencies {
     compile "io.vavr:vavr:${vavrVersion}"
     compile "com.github.javaparser:javaparser-core:${javaParserVersion}"
     compile "commons-io:commons-io:${commonsIoVersion}"
+    compile "org.fusesource.jansi:jansi:${jansiVersion}"
+
 }
 
 jar {

dependency-versions.gradle

@@ -5,4 +5,5 @@ ext {
   vavrVersion = '1.0.0-alpha-2'
   javaParserVersion = '3.13.4'
   commonsIoVersion = '2.6'
+  jansiVersion = '1.17.1'
 }

src/main/java/com/bartek/esa/formatter/archetype/Formatter.java

@@ -0,0 +1,9 @@
+package com.bartek.esa.formatter.archetype;
+
+import com.bartek.esa.core.model.object.Issue;
+
+import java.util.List;
+
+public interface Formatter {
+    void format(List<Issue> issues);
+}

src/main/java/com/bartek/esa/formatter/di/FormatterModule.java

@@ -0,0 +1,21 @@
+package com.bartek.esa.formatter.di;
+
+import com.bartek.esa.core.desc.provider.DescriptionProvider;
+import com.bartek.esa.formatter.formatter.ColorFormatter;
+import com.bartek.esa.formatter.formatter.SimpleFormatter;
+import dagger.Module;
+import dagger.Provides;
+
+@Module
+public class FormatterModule {
+
+    @Provides
+    public SimpleFormatter simpleFormatter(DescriptionProvider descriptionProvider) {
+        return new SimpleFormatter(descriptionProvider);
+    }
+
+    @Provides
+    public ColorFormatter colorFormatter(DescriptionProvider descriptionProvider) {
+        return new ColorFormatter(descriptionProvider);
+    }
+}

src/main/java/com/bartek/esa/formatter/formatter/ColorFormatter.java

@@ -0,0 +1,90 @@
+package com.bartek.esa.formatter.formatter;
+
+import com.bartek.esa.core.desc.provider.DescriptionProvider;
+import com.bartek.esa.core.model.object.Issue;
+import com.bartek.esa.formatter.archetype.Formatter;
+import org.fusesource.jansi.Ansi;
+import org.fusesource.jansi.AnsiConsole;
+
+import javax.inject.Inject;
+import java.util.List;
+import java.util.Optional;
+import java.util.stream.Collectors;
+
+import static org.fusesource.jansi.Ansi.Color.*;
+import static org.fusesource.jansi.Ansi.ansi;
+
+public class ColorFormatter implements Formatter {
+
+    private final DescriptionProvider descriptionProvider;
+
+    @Inject
+    public ColorFormatter(DescriptionProvider descriptionProvider) {
+        this.descriptionProvider = descriptionProvider;
+    }
+
+    @Override
+    public void format(List<Issue> issues) {
+        AnsiConsole.systemInstall();
+        String format = issues.stream()
+                .map(this::format)
+                .collect(Collectors.joining());
+
+        System.out.println(format.substring(0, format.length() - 2));
+        AnsiConsole.systemUninstall();
+    }
+
+    private String format(Issue issue) {
+        Ansi ansi = ansi();
+        ansi = appendDescription(issue, ansi);
+        ansi = appendFile(issue, ansi);
+        ansi = appendLine(issue, ansi);
+        ansi.a("\n");
+
+        return ansi.toString();
+    }
+
+    private Ansi appendDescription(Issue issue, Ansi ansi) {
+        String description = descriptionProvider.getDescriptionForIssue(issue);
+
+        return ansi
+                .fg(getColorForSeverity(issue))
+                .a(issue.getSeverity().name())
+                .reset()
+                .a(": ").a(description)
+                .a("\n");
+    }
+
+    private Ansi appendFile(Issue issue, Ansi ansi) {
+        return ansi
+                .fg(GREEN)
+                .a("File: ")
+                .reset()
+                .a(issue.getFile().getAbsolutePath())
+                .a("\n");
+    }
+
+    private Ansi appendLine(Issue issue, Ansi ansi) {
+        Optional.ofNullable(issue.getLine())
+                .ifPresent(line -> {
+                    ansi
+                            .fg(BLUE)
+                            .a("Line");
+                    Optional.ofNullable(issue.getLineNumber()).ifPresentOrElse(
+                            number -> ansi.a(" ").a(number).a(": "),
+                            () -> ansi.a(": ")
+                    );
+                    ansi.reset().a(line).a("\n");
+                });
+        return ansi;
+    }
+
+    private Ansi.Color getColorForSeverity(Issue issue) {
+        switch(issue.getSeverity()) {
+            case WARNING: return YELLOW;
+            case ERROR: return RED;
+        }
+
+        return RED;
+    }
+}

src/main/java/com/bartek/esa/formatter/formatter/SimpleFormatter.java

@@ -0,0 +1,65 @@
+package com.bartek.esa.formatter.formatter;
+
+import com.bartek.esa.core.desc.provider.DescriptionProvider;
+import com.bartek.esa.core.model.object.Issue;
+import com.bartek.esa.formatter.archetype.Formatter;
+
+import javax.inject.Inject;
+import java.util.List;
+import java.util.Optional;
+import java.util.stream.Collectors;
+
+public class SimpleFormatter implements Formatter {
+    private final DescriptionProvider descriptionProvider;
+
+    @Inject
+    public SimpleFormatter(DescriptionProvider descriptionProvider) {
+        this.descriptionProvider = descriptionProvider;
+    }
+
+    @Override
+    public void format(List<Issue> issues) {
+        String format = issues.stream()
+                .map(this::format)
+                .collect(Collectors.joining());
+
+        System.out.println(format.substring(0, format.length() - 2));
+    }
+
+    private String format(Issue issue) {
+        StringBuilder format = new StringBuilder();
+        appendDescription(issue, format);
+        appendFile(issue, format);
+        appendLine(issue, format);
+        format.append("\n");
+
+        return format.toString();
+    }
+
+    private void appendDescription(Issue issue, StringBuilder format) {
+        String description = descriptionProvider.getDescriptionForIssue(issue);
+        format
+                .append(issue.getSeverity().name())
+                .append(": ").append(description)
+                .append("\n");
+    }
+
+    private void appendFile(Issue issue, StringBuilder format) {
+        format
+                .append("File: ")
+                .append(issue.getFile().getAbsolutePath())
+                .append("\n");
+    }
+
+    private void appendLine(Issue issue, StringBuilder format) {
+        Optional.ofNullable(issue.getLine())
+                .ifPresent(line -> {
+                    format.append("Line");
+                    Optional.ofNullable(issue.getLineNumber()).ifPresentOrElse(
+                            number -> format.append(" ").append(number).append(": "),
+                            () -> format.append(": ")
+                    );
+                    format.append(line).append("\n");
+                });
+    }
+}