supplier/.gitignore

@@ -0,0 +1,32 @@
+HELP.md
+.gradle
+build/
+!gradle/wrapper/gradle-wrapper.jar
+!**/src/main/**
+!**/src/test/**
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+out/
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+
+### VS Code ###
+.vscode/

supplier/build.gradle

@@ -0,0 +1,29 @@
+plugins {
+	id 'org.springframework.boot' version '2.2.7.RELEASE'
+	id 'io.spring.dependency-management' version '1.0.9.RELEASE'
+	id 'java'
+}
+
+group = 'org.hso.ecommerce'
+version = '0.0.1-SNAPSHOT'
+sourceCompatibility = '11'
+
+apply plugin: 'java'
+apply plugin: 'idea'
+apply plugin: 'org.springframework.boot'
+apply plugin: 'io.spring.dependency-management'
+
+repositories {
+	mavenCentral()
+}
+
+dependencies {
+	implementation 'org.springframework.boot:spring-boot-starter-web'
+	testImplementation('org.springframework.boot:spring-boot-starter-test') {
+		exclude group: 'org.junit.vintage', module: 'junit-vintage-engine'
+	}
+}
+
+test {
+	useJUnitPlatform()
+}

supplier/config/bank.json

@@ -0,0 +1,26 @@
+{
+  "id" : "bank",
+  "name" : "Bank of Cheese",
+  "discount" : {
+    "minimumDailySalesVolumeNetCent": 100,
+    "percentDiscount": 1
+  },
+  "articles": [
+    {
+      "title": "Big Mac",
+      "manufacturer": "Mc Donalds",
+      "articleNumber": "0x1 BIGMAC",
+      "vatPercent": 7,
+      "pricePerUnitNet": 700,
+      "shouldBeAdvertised": true
+    },
+    {
+      "title": "500£ Schein",
+      "manufacturer": "Bank",
+      "articleNumber": "500",
+      "vatPercent": 0,
+      "pricePerUnitNet": 50000,
+      "shouldBeAdvertised": false
+    }
+  ]
+}

supplier/config/hans-and-more.json

@@ -0,0 +1,34 @@
+{
+  "id" : "hans",
+  "name" : "Hans and more",
+  "discount" : {
+    "minimumDailySalesVolumeNetCent": 100000,
+    "percentDiscount": 2
+  },
+  "articles": [
+    {
+      "title": "Big Mac",
+      "manufacturer": "Mc Donalds",
+      "articleNumber": "0x1 BIGMAC",
+      "vatPercent": 7,
+      "pricePerUnitNet": 700,
+      "shouldBeAdvertised": true
+    },
+    {
+      "title": "Pommes",
+      "manufacturer": "Mc Donalds",
+      "articleNumber": "0x1 POmes",
+      "vatPercent": 7,
+      "pricePerUnitNet": 100,
+      "shouldBeAdvertised": false
+    },
+    {
+      "title": "Milchshake Premium 19%",
+      "manufacturer": "Mc Donalds",
+      "articleNumber": "0x2",
+      "vatPercent": 19,
+      "pricePerUnitNet": 50,
+      "shouldBeAdvertised": true
+    }
+  ]
+}

supplier/gradlew

@@ -0,0 +1,183 @@
+#!/usr/bin/env sh
+
+#
+# Copyright 2015 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+##############################################################################
+##
+##  Gradle start up script for UN*X
+##
+##############################################################################
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+        PRG="$link"
+    else
+        PRG=`dirname "$PRG"`"/$link"
+    fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >/dev/null
+APP_HOME="`pwd -P`"
+cd "$SAVED" >/dev/null
+
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn () {
+    echo "$*"
+}
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "`uname`" in
+  CYGWIN* )
+    cygwin=true
+    ;;
+  Darwin* )
+    darwin=true
+    ;;
+  MINGW* )
+    msys=true
+    ;;
+  NONSTOP* )
+    nonstop=true
+    ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+        JAVACMD="$JAVA_HOME/bin/java"
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD="java"
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
+    MAX_FD_LIMIT=`ulimit -H -n`
+    if [ $? -eq 0 ] ; then
+        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+            MAX_FD="$MAX_FD_LIMIT"
+        fi
+        ulimit -n $MAX_FD
+        if [ $? -ne 0 ] ; then
+            warn "Could not set maximum file descriptor limit: $MAX_FD"
+        fi
+    else
+        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+    fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then
+    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
+    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+    JAVACMD=`cygpath --unix "$JAVACMD"`
+
+    # We build the pattern for arguments to be converted via cygpath
+    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+    SEP=""
+    for dir in $ROOTDIRSRAW ; do
+        ROOTDIRS="$ROOTDIRS$SEP$dir"
+        SEP="|"
+    done
+    OURCYGPATTERN="(^($ROOTDIRS))"
+    # Add a user-defined pattern to the cygpath arguments
+    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+    fi
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    i=0
+    for arg in "$@" ; do
+        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
+
+        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
+            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+        else
+            eval `echo args$i`="\"$arg\""
+        fi
+        i=`expr $i + 1`
+    done
+    case $i in
+        0) set -- ;;
+        1) set -- "$args0" ;;
+        2) set -- "$args0" "$args1" ;;
+        3) set -- "$args0" "$args1" "$args2" ;;
+        4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+    esac
+fi
+
+# Escape application args
+save () {
+    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
+    echo " "
+}
+APP_ARGS=`save "$@"`
+
+# Collect all arguments for the java command, following the shell quoting and substitution rules
+eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
+
+exec "$JAVACMD" "$@"

supplier/gradlew.bat

@@ -0,0 +1,103 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto init
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto init
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:init
+@rem Get command-line arguments, handling Windows variants
+
+if not "%OS%" == "Windows_NT" goto win9xME_args
+
+:win9xME_args
+@rem Slurp the command line arguments.
+set CMD_LINE_ARGS=
+set _SKIP=2
+
+:win9xME_args_slurp
+if "x%~1" == "x" goto execute
+
+set CMD_LINE_ARGS=%*
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

supplier/settings.gradle

@@ -0,0 +1 @@
+rootProject.name = 'supplier'

supplier/src/main/java/org/hso/ecommerce/supplier/App.java

@@ -0,0 +1,11 @@
+package org.hso.ecommerce.supplier;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class App {
+    public static void main(String[] args) {
+        SpringApplication.run(App.class, args);
+    }
+}

supplier/src/main/java/org/hso/ecommerce/supplier/ConfigurationReader.java

@@ -0,0 +1,45 @@
+package org.hso.ecommerce.supplier;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import org.hso.ecommerce.supplier.data.Supplier;
+
+import java.io.File;
+import java.io.IOException;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Objects;
+import java.util.stream.Collectors;
+
+public class ConfigurationReader {
+
+    public static List<Supplier> read() throws IOException {
+        File dir = new File("./config/");
+
+        System.out.println("Loading Config in " + dir.getAbsolutePath());
+        ArrayList<Supplier> ret = Files.list(dir.toPath()).map(path -> {
+
+            System.out.println("Iterating over; " + path);
+            if (path.toString().endsWith(".json")) {
+                try {
+                    String jsonData = Files.readString(path, StandardCharsets.UTF_8);
+                    ObjectMapper objectMapper = new ObjectMapper();
+                    Supplier sup = (Supplier)objectMapper.readValue(jsonData, Supplier.class);
+                    System.out.println("Loaded " + sup.id);
+                    return sup;
+                } catch (IOException e) {
+                    e.printStackTrace();
+                }
+            } else {
+                System.out.println("Skipping because of file extension.");
+            }
+            return null;
+        }).collect(Collectors.toCollection(ArrayList::new));
+
+        ret.removeIf(Objects::isNull);
+
+        return ret;
+    }
+}
+

supplier/src/main/java/org/hso/ecommerce/supplier/RequestController.java

@@ -0,0 +1,88 @@
+package org.hso.ecommerce.supplier;
+
+import org.hso.ecommerce.supplier.data.Article;
+import org.hso.ecommerce.supplier.data.Order;
+import org.hso.ecommerce.supplier.data.OrderConfirmation;
+import org.hso.ecommerce.supplier.data.Supplier;
+import org.springframework.web.bind.annotation.*;
+
+import javax.annotation.PostConstruct;
+import javax.servlet.http.HttpServletResponse;
+import java.io.IOException;
+import java.text.SimpleDateFormat;
+import java.util.ArrayList;
+import java.util.Date;
+import java.util.HashMap;
+import java.util.List;
+
+@RestController
+public class RequestController {
+
+    private final HashMap<String, Integer> dailySalesVolumeCent = new HashMap<>();
+    private final HashMap<String, Supplier> knownSuppliers  = new HashMap<>();
+    private final SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd");
+
+    @PostConstruct
+    public void init() throws IOException {
+        for (Supplier s : ConfigurationReader.read()) {
+            knownSuppliers.put(s.id, s);
+        }
+    }
+
+
+    @GetMapping("/")
+    public List<Supplier> index() {
+        return new ArrayList<>(knownSuppliers.values());
+    }
+
+    @GetMapping("/{supplier}/")
+    public Supplier supplier(HttpServletResponse res, @PathVariable("supplier") String supplierName) {
+        Supplier s = knownSuppliers.get(supplierName);
+        if(s == null) {
+            res.setStatus(HttpServletResponse.SC_NOT_FOUND);
+        }
+        return s;
+    }
+
+    @PostMapping("/{supplier}/order")
+    public OrderConfirmation order(HttpServletResponse res, @PathVariable("supplier") String supplierName, @RequestBody Order order) {
+        Supplier s = knownSuppliers.get(supplierName);
+        if(s == null) {
+            res.setStatus(HttpServletResponse.SC_NOT_FOUND);
+            return null;
+        }
+
+        String dateKey = simpleDateFormat.format(new Date());
+        int dailyVolume = dailySalesVolumeCent.getOrDefault(dateKey,0);
+
+        Article a = s.findArticle(order.manufacturer, order.articleNumber);
+        if(a == null) {
+            res.setStatus(HttpServletResponse.SC_BAD_REQUEST);
+            return null;
+        }
+
+        int priceNet = a.pricePerUnitNet * order.quantity;
+        int discount = 0;
+        if(dailyVolume >= s.discount.minimumDailySalesVolumeNetCent) {
+            discount = (priceNet * s.discount.percentDiscount) / 100;
+        }
+
+        OrderConfirmation confirmation = new OrderConfirmation();
+        confirmation.articleNumber = order.articleNumber;
+        confirmation.discountNetCent = discount;
+        confirmation.pricePerUnitNetCent = a.pricePerUnitNet;
+        confirmation.manufacturer = a.manufacturer;
+        confirmation.quantity = order.quantity;
+        confirmation.totalPriceNetCharged = priceNet - discount;
+
+        if (confirmation.totalPriceNetCharged > order.maxTotalPriceCentNet) {
+            res.setStatus(HttpServletResponse.SC_EXPECTATION_FAILED);
+            return null;
+        }
+
+        dailyVolume += confirmation.totalPriceNetCharged;
+        dailySalesVolumeCent.put(dateKey, dailyVolume);
+
+        return confirmation;
+    }
+}

supplier/src/main/java/org/hso/ecommerce/supplier/data/Article.java

@@ -0,0 +1,11 @@
+package org.hso.ecommerce.supplier.data;
+
+public class Article {
+    public String title;
+    public String manufacturer;
+    public String articleNumber;
+
+    public int vatPercent;
+    public int pricePerUnitNet;
+    public boolean shouldBeAdvertised;
+}

supplier/src/main/java/org/hso/ecommerce/supplier/data/Order.java

@@ -0,0 +1,9 @@
+package org.hso.ecommerce.supplier.data;
+
+public class Order {
+    public String manufacturer;
+    public String articleNumber;
+
+    public int quantity;
+    public int maxTotalPriceCentNet;
+}

supplier/src/main/java/org/hso/ecommerce/supplier/data/OrderConfirmation.java

@@ -0,0 +1,12 @@
+package org.hso.ecommerce.supplier.data;
+
+public class OrderConfirmation {
+    public String manufacturer;
+    public String articleNumber;
+
+    public int quantity;
+
+    public int pricePerUnitNetCent;
+    public int discountNetCent;
+    public int totalPriceNetCharged;
+}

supplier/src/main/java/org/hso/ecommerce/supplier/data/Supplier.java

@@ -0,0 +1,21 @@
+package org.hso.ecommerce.supplier.data;
+
+import java.util.List;
+
+public class Supplier {
+
+    public String id;
+    public String name;
+    public SupplierDiscount discount;
+    public List<Article> articles;
+
+    public Article findArticle(String manufacturer, String articleNumber) {
+        for(Article a : articles) {
+            if(a.manufacturer.equals(manufacturer) && a.articleNumber.equals(articleNumber)) {
+                return a;
+            }
+        }
+
+        return null;
+    }
+}

supplier/src/main/java/org/hso/ecommerce/supplier/data/SupplierDiscount.java

@@ -0,0 +1,6 @@
+package org.hso.ecommerce.supplier.data;
+
+public class SupplierDiscount {
+    public int minimumDailySalesVolumeNetCent;
+    public int percentDiscount;
+}

supplier/src/main/resources/application.properties

@@ -0,0 +1,2 @@
+server.address=::1
+server.port=8081