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Signed-off-by: Severin Kaderli <severin@kaderli.dev>
This commit is contained in:
Severin Kaderli 2022-03-28 17:43:04 +02:00
commit c016d3cf61
Signed by: severinkaderli
GPG key ID: F419F8835B72F0C4
8 changed files with 231 additions and 0 deletions
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.gitignore vendored Normal file
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target/
.idea/
*.iml

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pom.xml Normal file
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<?xml version="1.0" encoding="UTF-8"?>
<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://maven.apache.org/POM/4.0.0"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<artifactId>consoleApp</artifactId>
<groupId>dev.kaderli</groupId>
<version>1.0-SNAPSHOT</version>
<packaging>jar</packaging>
<name>consoleApp</name>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<kotlin.code.style>official</kotlin.code.style>
<kotlin.compiler.jvmTarget>1.8</kotlin.compiler.jvmTarget>
</properties>
<repositories>
<repository>
<id>mavenCentral</id>
<url>https://repo1.maven.org/maven2/</url>
</repository>
</repositories>
<build>
<sourceDirectory>src/main/kotlin</sourceDirectory>
<testSourceDirectory>src/test/kotlin</testSourceDirectory>
<plugins>
<plugin>
<groupId>org.jetbrains.kotlin</groupId>
<artifactId>kotlin-maven-plugin</artifactId>
<version>1.5.10</version>
<executions>
<execution>
<id>compile</id>
<phase>compile</phase>
<goals>
<goal>compile</goal>
</goals>
</execution>
<execution>
<id>test-compile</id>
<phase>test-compile</phase>
<goals>
<goal>test-compile</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.22.2</version>
</plugin>
<plugin>
<artifactId>maven-failsafe-plugin</artifactId>
<version>2.22.2</version>
</plugin>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>exec-maven-plugin</artifactId>
<version>1.6.0</version>
<configuration>
<mainClass>MainKt</mainClass>
</configuration>
</plugin>
</plugins>
</build>
<dependencies>
<dependency>
<groupId>org.jetbrains.kotlin</groupId>
<artifactId>kotlin-test-junit5</artifactId>
<version>1.5.10</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.junit.jupiter</groupId>
<artifactId>junit-jupiter-engine</artifactId>
<version>5.6.0</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.jetbrains.kotlin</groupId>
<artifactId>kotlin-stdlib-jdk8</artifactId>
<version>1.5.10</version>
</dependency>
</dependencies>
</project>

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src/main/kotlin/Invoice.kt Normal file
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import java.io.File
class Invoice {
/**
* The products that belong to the invoice.
*/
var products = ArrayList<Product>()
/**
* Adds a product to the invoice
*/
fun addProduct(product: Product) {
products.add(product)
}
/**
* Returns the total price of all products.
*/
fun getTotalPrice(): Float {
return products.map { it.totalPrice }.sum()
}
companion object {
/**
* Creates an invoice from a file.
*/
fun fromFile(fileName: String): Invoice {
val invoice = Invoice()
var columns: List<String> = emptyList()
var processedHeader = false
File(fileName).readLines().forEach { line ->
// Don't process table dividers
if (isDivider(line) || line.isBlank()) {
return@forEach
}
if (!processedHeader) {
columns = parseLine(line)
processedHeader = true
return@forEach
}
val product = Product()
val lineItems = parseLine(line)
columns.forEachIndexed { index, column ->
val value = lineItems[index]
when (column) {
"Item" -> product.name = value
"Unit Price" -> product.price = value.toFloat()
"Quantity" -> product.quantity = value.toFloat().toInt()
// "More information about a product is possible, e.g. description, but can be ignored."
"Description", "Pos", "Amount" -> {}
else -> throw Exception("Unknown column: $column")
}
}
invoice.addProduct(product)
}
return invoice
}
private fun parseLine(line: String): List<String> {
return line.trim().trim('|').split('|').map { it.trim() }
}
private fun isDivider(line: String): Boolean {
return line.trim().startsWith("|*")
}
}
}

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src/main/kotlin/Main.kt Normal file
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fun main() {
//val invoice = Invoice.fromFile("src/main/resources/invoice1.txt")
//val invoice = Invoice.fromFile("src/main/resources/invoice2.txt")
val invoice = Invoice.fromFile("src/main/resources/invoice3.txt")
// "Implement a program that determines the number of purchased products in the table..."
println(invoice.products.size)
// "...and calculates the total price of the purchased products (per file) without using the amount column."
println(invoice.getTotalPrice())
// "It should be also possible to get an array or arraylist of all purchased products in a file"
println(invoice.products)
}

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src/main/kotlin/Product.kt Normal file
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/**
* This class represents a row in the invoice text files.
*
* Using product.totalPrice to total price of the product can be retrieved.
*/
data class Product(
var name: String = "",
var price: Float = 0f,
var quantity: Int = 0
) {
val totalPrice: Float
get() {
return quantity * price
}
}

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src/main/resources/invoice1.txt Normal file
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|****************************************|****************|**********|*********|
| Item | Unit Price | Quantity | Amount |
|****************************************|****************|**********|*********|
| Table | 699.00 | 1.00 | 699.00 |
| Dining chairs | 79.95 | 10.00 | 799.50 |
| Sofa | 329.00 | 2.00 | 658.00 |
| footstool | 199.00 | 3.00 | 597.00 |
| Armchair | 279.00 | 3.00 | 837.00 |
| Lamp | 89.95 | 4.00 | 359.80 |
|****************************************|****************|**********|*********|

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src/main/resources/invoice2.txt Normal file
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|*****************************************|****************|**********|*********|
| Item | Description | Unit Price | Quantity | Amount |
|*****************************************|****************|**********|*********|
| Table | acacia235x100 cm | 699.00 | 1.00 | 699.00 |
| Dining chairs | white/in/outdoor | 79.95 | 10.00 | 799.50 |
| Sofa | 3-seat sofa, dark grey| 329.00 | 2.00 | 658.00 |
| footstool | Bomstad dark brown | 199.00 | 3.00 | 597.00 |
| Armchair | Idhult black | 279.00 | 3.00 | 837.00 |
| Lamp | Floor lamp, white | 89.95 | 4.00 | 359.80 |
|*****************************************|****************|**********|*********|

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src/main/resources/invoice3.txt Normal file
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|********|********************************|****************|**********|*********|
| Pos | Item | Unit Price | Quantity | Amount |
|********|********************************|****************|**********|*********|
| 1 | Table | 699.00 | 1.00 | 699.00 |
| 2 | Dining chairs | 79.95 | 10.00 | 799.50 |
| 3 | Sofa | 329.00 | 2.00 | 658.00 |
| 4 | footstool | 199.00 | 3.00 | 597.00 |
| 5 | Armchair | 279.00 | 3.00 | 837.00 |
| 6 | Lamp | 89.95 | 4.00 | 359.80 |
|********|********************************|****************|**********|*********|