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maze-generator
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Do some refactoring and reformatting. Also, use logback instead of plain ol' System.out.println().

This commit is contained in:
Manuel Friedli 2022-02-02 00:44:23 +01:00
parent c8619f80e8
commit 28c78325fe
Signed by: manuel
GPG Key ID: 41D08ABA75634DA1
10 changed files with 121 additions and 61 deletions
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13
pom.xml
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@ -14,7 +14,9 @@
<version>0.0.2-SNAPSHOT</version>
<properties>
<logback.version>1.2.10</logback.version>
<pdfbox.version>2.0.25</pdfbox.version>
<slf4j.version>1.7.35</slf4j.version>
</properties>
<dependencies>
@ -35,10 +37,19 @@
<artifactId>pdfbox</artifactId>
<version>${pdfbox.version}</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>${slf4j.version}</version>
</dependency>
<dependency>
<groupId>ch.qos.logback</groupId>
<artifactId>logback-classic</artifactId>
<version>${logback.version}</version>
</dependency>
<dependency>
<groupId>org.junit.jupiter</groupId>
<artifactId>junit-jupiter-api</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>

16
src/main/java/ch/fritteli/labyrinth/generator/Main.java
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@ -7,10 +7,12 @@ import ch.fritteli.labyrinth.generator.renderer.pdffile.PDFFileRenderer;
import ch.fritteli.labyrinth.generator.renderer.text.TextRenderer;
import ch.fritteli.labyrinth.generator.renderer.textfile.TextFileRenderer;
import lombok.NonNull;
import lombok.extern.slf4j.Slf4j;
import java.nio.file.Path;
import java.nio.file.Paths;
@Slf4j
public class Main {
public static void main(@NonNull final String[] args) {
int width = 100;
@ -28,19 +30,19 @@ public class Main {
final PDFFileRenderer pdfFileRenderer = PDFFileRenderer.newInstance()
.setTargetFile(userHome.resolve(baseFilename + ".pdf"));
System.out.println("Labyrinth-ID: " + labyrinth.getRandomSeed());
log.info("Labyrinth-ID: {}", labyrinth.getRandomSeed());
// Render Labyrinth to stdout
System.out.println(textRenderer.render(labyrinth));
log.info("Text rendering:\n{}", textRenderer.render(labyrinth));
// Render Labyrinth solution to stdout
System.out.println(textRenderer.setRenderSolution(true).render(labyrinth));
log.info("Text rendering with solution:\n{}", textRenderer.setRenderSolution(true).render(labyrinth));
// Render HTML to stdout
System.out.println(htmlRenderer.render(labyrinth));
log.info("HTML rendering:\n{}", htmlRenderer.render(labyrinth));
// Render Labyrinth and solution to (separate) files
System.out.println(textFileRenderer.render(labyrinth));
log.info("Text rendering to file:\n{}", textFileRenderer.render(labyrinth));
// Render HTML to file
System.out.println(htmlFileRenderer.render(labyrinth));
log.info("HTML rendering to file:\n{}", htmlFileRenderer.render(labyrinth));
// Render PDF to file
System.out.println(pdfFileRenderer.render(labyrinth));
log.info("PDF rendering to file:\n{}", pdfFileRenderer.render(labyrinth));
}
private static String getBaseFilename(@NonNull final Labyrinth labyrinth) {

1
src/main/java/ch/fritteli/labyrinth/generator/renderer/html/HTMLRenderer.java
View File

@ -16,6 +16,7 @@ public class HTMLRenderer implements Renderer<String> {
}
@NonNull
@Override
public String render(@NonNull final Labyrinth labyrinth) {
if (labyrinth.getWidth() == 0 || labyrinth.getHeight() == 0) {
return this.getPreamble(labyrinth) + POSTAMBLE;

36
src/main/java/ch/fritteli/labyrinth/generator/renderer/htmlfile/HTMLFileRenderer.java
View File

@ -3,25 +3,30 @@ package ch.fritteli.labyrinth.generator.renderer.htmlfile;
import ch.fritteli.labyrinth.generator.model.Labyrinth;
import ch.fritteli.labyrinth.generator.renderer.Renderer;
import ch.fritteli.labyrinth.generator.renderer.html.HTMLRenderer;
import io.vavr.control.Option;
import io.vavr.control.Try;
import lombok.NonNull;
import lombok.extern.slf4j.Slf4j;
import java.io.File;
import java.io.IOException;
import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.NoSuchElementException;
@Slf4j
public class HTMLFileRenderer implements Renderer<Path> {
@NonNull
private static final HTMLRenderer HTML_RENDERER = HTMLRenderer.newInstance();
private Path targetFile;
@NonNull
private Option<Path> targetFile;
private HTMLFileRenderer() {
try {
this.targetFile = Files.createTempFile("labyrinth_", ".html");
} catch (IOException e) {
System.err.println("Unable to set default target file.");
e.printStackTrace();
}
this.targetFile = Try
.of(() -> Files.createTempFile("labyrinth_", ".html"))
.onFailure(ex -> log.error("Unable to set default target file.", ex))
.toOption();
}
@NonNull
@ -30,30 +35,33 @@ public class HTMLFileRenderer implements Renderer<Path> {
}
public boolean isTargetFileDefinedAndWritable() {
return this.targetFile != null && this.targetFile.toFile().canWrite();
return this.targetFile
.map(Path::toFile)
.exists(File::canWrite);
}
@NonNull
public HTMLFileRenderer setTargetFile(@NonNull final Path targetFile) {
this.targetFile = targetFile;
this.targetFile = Option.of(targetFile);
return this;
}
@NonNull
@Override
public Path render(@NonNull final Labyrinth labyrinth) {
if (!this.isTargetFileDefinedAndWritable()) {
try {
Files.createFile(this.targetFile);
} catch (IOException e) {
Files.createFile(this.targetFile.get());
} catch (IOException | NoSuchElementException e) {
throw new IllegalArgumentException("Cannot write to target file.", e);
}
}
final String html = HTML_RENDERER.render(labyrinth);
final Path targetFile = this.targetFile.get();
try {
Files.writeString(this.targetFile, html, StandardCharsets.UTF_8);
Files.writeString(targetFile, html, StandardCharsets.UTF_8);
} catch (IOException e) {
System.err.println("Failed writing to file " + this.targetFile.normalize().toString());
e.printStackTrace();
log.error("Failed writing to file " + targetFile.normalize(), e);
}
return targetFile;
}

11
src/main/java/ch/fritteli/labyrinth/generator/renderer/pdf/Generator.java
View File

@ -8,6 +8,7 @@ import io.vavr.control.Option;
import lombok.NonNull;
import lombok.RequiredArgsConstructor;
import lombok.Value;
import lombok.extern.slf4j.Slf4j;
import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.pdmodel.PDDocumentInformation;
import org.apache.pdfbox.pdmodel.PDPage;
@ -20,14 +21,12 @@ import java.io.ByteArrayOutputStream;
import java.io.IOException;
@RequiredArgsConstructor
@Slf4j
class Generator {
@NonNull
private final Labyrinth labyrinth;
private static boolean isValid(@NonNull final Position position) {
return position.getX() >= 0 && position.getY() >= 0;
}
@NonNull
public byte[] generate() {
final float pageWidth = this.labyrinth.getWidth() * PDFRenderer.SCALE + 2 * PDFRenderer.MARGIN;
final float pageHeight = this.labyrinth.getHeight() * PDFRenderer.SCALE + 2 * PDFRenderer.MARGIN;
@ -48,14 +47,14 @@ class Generator {
this.drawVerticalLines(puzzlePageContentStream, solutionPageContentStream);
this.drawSolution(solutionPageContentStream);
} catch (IOException e) {
e.printStackTrace();
log.error("Error while rendering PDF document", e);
}
final ByteArrayOutputStream output = new ByteArrayOutputStream();
try {
pdDocument.save(output);
pdDocument.close();
} catch (IOException e) {
e.printStackTrace();
log.error("Error while writing PDF data", e);
}
return output.toByteArray();
}

2
src/main/java/ch/fritteli/labyrinth/generator/renderer/pdf/PDFRenderer.java
View File

@ -16,8 +16,8 @@ public class PDFRenderer implements Renderer<byte[]> {
return new PDFRenderer();
}
@Override
@NonNull
@Override
public byte[] render(@NonNull final Labyrinth labyrinth) {
final Generator generator = new Generator(labyrinth);
return generator.generate();

14
src/main/java/ch/fritteli/labyrinth/generator/renderer/pdffile/PDFFileRenderer.java
View File

@ -6,6 +6,7 @@ import ch.fritteli.labyrinth.generator.renderer.pdf.PDFRenderer;
import io.vavr.control.Option;
import io.vavr.control.Try;
import lombok.NonNull;
import lombok.extern.slf4j.Slf4j;
import java.io.File;
import java.io.IOException;
@ -13,6 +14,7 @@ import java.nio.file.Files;
import java.nio.file.Path;
import java.util.NoSuchElementException;
@Slf4j
public class PDFFileRenderer implements Renderer<Path> {
@NonNull
private static final PDFRenderer PDF_RENDERER = PDFRenderer.newInstance();
@ -22,10 +24,7 @@ public class PDFFileRenderer implements Renderer<Path> {
private PDFFileRenderer() {
this.targetFile = Try
.of(() -> Files.createTempFile("labyrinth_", ".pdf"))
.onFailure(ex -> {
System.err.println("Unable to set default target file.");
ex.printStackTrace();
})
.onFailure(ex -> log.error("Unable to set default target file.", ex))
.toOption();
}
@ -37,8 +36,7 @@ public class PDFFileRenderer implements Renderer<Path> {
public boolean isTargetFileDefinedAndWritable() {
return this.targetFile
.map(Path::toFile)
.map(File::canWrite)
.getOrElse(false);
.exists(File::canWrite);
}
@NonNull
@ -47,6 +45,7 @@ public class PDFFileRenderer implements Renderer<Path> {
return this;
}
@NonNull
@Override
public Path render(@NonNull final Labyrinth labyrinth) {
if (!this.isTargetFileDefinedAndWritable()) {
@ -61,8 +60,7 @@ public class PDFFileRenderer implements Renderer<Path> {
try {
Files.write(targetFile, bytes);
} catch (IOException e) {
System.err.println("Failed writing to file " + targetFile.normalize().toString());
e.printStackTrace();
log.error("Failed writing to file " + targetFile.normalize(), e);
}
return targetFile;
}

1
src/main/java/ch/fritteli/labyrinth/generator/renderer/text/TextRenderer.java
View File

@ -23,6 +23,7 @@ public class TextRenderer implements Renderer<String> {
}
@NonNull
@Override
public String render(@NonNull final Labyrinth labyrinth) {
if (labyrinth.getWidth() == 0 || labyrinth.getHeight() == 0) {
return "";

72
src/main/java/ch/fritteli/labyrinth/generator/renderer/textfile/TextFileRenderer.java
View File

@ -4,29 +4,42 @@ import ch.fritteli.labyrinth.generator.model.Labyrinth;
import ch.fritteli.labyrinth.generator.renderer.Renderer;
import ch.fritteli.labyrinth.generator.renderer.text.TextRenderer;
import io.vavr.collection.List;
import io.vavr.control.Option;
import io.vavr.control.Try;
import lombok.NonNull;
import lombok.extern.slf4j.Slf4j;
import java.io.File;
import java.io.IOException;
import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.NoSuchElementException;
@Slf4j
public class TextFileRenderer implements Renderer<List<Path>> {
@NonNull
private static final TextRenderer TEXT_RENDERER = TextRenderer.newInstance();
private Path targetLabyrinthFile;
private Path targetSolutionFile;
@NonNull
private Option<Path> targetLabyrinthFile;
@NonNull
private Option<Path> targetSolutionFile;
private TextFileRenderer() {
try {
this.targetLabyrinthFile = Files.createTempFile("labyrinth_", ".txt");
this.targetSolutionFile = this.targetLabyrinthFile.getParent().resolve(
this.targetLabyrinthFile.getFileName().toString().replace(".txt", "-solution.txt")
);
} catch (IOException e) {
System.err.println("Unable to set default target file.");
e.printStackTrace();
}
this.targetLabyrinthFile = Try
.of(() -> Files.createTempFile("labyrinth_", ".txt"))
.onFailure(ex -> log.error("Unable to set default target file", ex))
.toOption();
this.targetSolutionFile = this.targetLabyrinthFile.toTry()
.map(Path::getParent)
.flatMap(parent -> this.targetLabyrinthFile.toTry()
.map(Path::getFileName)
.map(Path::toString)
.map(a -> a.replace(".txt", "-solution.txt"))
.map(parent::resolve))
.onFailure(ex -> log.error("Unable to set default solution target file", ex))
.toOption();
}
@NonNull
@ -35,38 +48,44 @@ public class TextFileRenderer implements Renderer<List<Path>> {
}
public boolean isTargetLabyrinthFileDefinedAndWritable() {
return this.targetLabyrinthFile != null && this.targetLabyrinthFile.toFile().canWrite();
return this.targetLabyrinthFile
.map(Path::toFile)
.exists(File::canWrite);
}
public boolean isTargetSolutionFileDefinedAndWritable() {
return this.targetSolutionFile != null && this.targetSolutionFile.toFile().canWrite();
return this.targetSolutionFile
.map(Path::toFile)
.exists(File::canWrite);
}
@NonNull
public TextFileRenderer setTargetLabyrinthFile(@NonNull final Path targetLabyrinthFile) {
this.targetLabyrinthFile = targetLabyrinthFile;
this.targetLabyrinthFile = Option.of(targetLabyrinthFile);
return this;
}
@NonNull
public TextFileRenderer setTargetSolutionFile(@NonNull final Path targetSolutionFile) {
this.targetSolutionFile = targetSolutionFile;
this.targetSolutionFile = Option.of(targetSolutionFile);
return this;
}
@NonNull
@Override
public List<Path> render(@NonNull final Labyrinth labyrinth) {
if (!this.isTargetLabyrinthFileDefinedAndWritable()) {
try {
Files.createFile(this.targetLabyrinthFile);
} catch (IOException e) {
Files.createFile(this.targetLabyrinthFile.get());
} catch (IOException | NoSuchElementException e) {
log.error("Cannot write to target labyrinth file.", e);
throw new IllegalArgumentException("Cannot write to target labyrinth file.", e);
}
}
if (!this.isTargetSolutionFileDefinedAndWritable()) {
try {
Files.createFile(this.targetSolutionFile);
} catch (IOException e) {
Files.createFile(this.targetSolutionFile.get());
} catch (IOException | NoSuchElementException e) {
throw new IllegalArgumentException("Cannot write to target solution file.", e);
}
}
@ -76,13 +95,18 @@ public class TextFileRenderer implements Renderer<List<Path>> {
text = TEXT_RENDERER.setRenderSolution(false).render(labyrinth).strip();
solution = TEXT_RENDERER.setRenderSolution(true).render(labyrinth).strip();
}
final Path targetLabyrinthFile = this.targetLabyrinthFile.get();
final Path targetSolutionFile = this.targetSolutionFile.get();
try {
Files.write(this.targetLabyrinthFile, text.getBytes(StandardCharsets.UTF_8));
Files.write(this.targetSolutionFile, solution.getBytes(StandardCharsets.UTF_8));
Files.write(targetLabyrinthFile, text.getBytes(StandardCharsets.UTF_8));
} catch (IOException e) {
System.err.println("Failed writing to file " + this.targetLabyrinthFile.normalize().toString());
e.printStackTrace();
log.error("Failed writing to file " + targetLabyrinthFile.normalize(), e);
}
return List.of(this.targetLabyrinthFile, this.targetSolutionFile);
try {
Files.write(targetSolutionFile, solution.getBytes(StandardCharsets.UTF_8));
} catch (IOException e) {
log.error("Failed writing to file " + targetSolutionFile.normalize());
}
return List.of(targetLabyrinthFile, targetSolutionFile);
}
}

16
src/main/resources/logback.xml Normal file
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@ -0,0 +1,16 @@
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<shutdownHook class="ch.qos.logback.core.hook.DelayingShutdownHook"/>
<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
<!-- encoders are by default assigned the type
ch.qos.logback.classic.encoder.PatternLayoutEncoder -->
<encoder>
<pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>
</encoder>
</appender>
<root level="info">
<appender-ref ref="STDOUT"/>
</root>
</configuration>