[AB-xxx] adding rest-api base to abstracto with capability to load custom code if necessary

abstracto-application/pom.xml

@@ -19,6 +19,7 @@
         <module>scheduling</module>
         <module>documentation</module>
         <module>bundle</module>
+        <module>rest-api</module>
     </modules>
 
     <distributionManagement>

abstracto-application/rest-api/pom.xml

@@ -0,0 +1,38 @@
+<?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/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <parent>
+        <groupId>dev.sheldan.abstracto</groupId>
+        <artifactId>abstracto-application</artifactId>
+        <version>1.5.15-SNAPSHOT</version>
+    </parent>
+
+    <groupId>dev.sheldan.sissi.api</groupId>
+    <artifactId>rest-api</artifactId>
+    <packaging>pom</packaging>
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-assembly-plugin</artifactId>
+                <executions>
+                    <execution>
+                        <phase>package</phase>
+                        <goals>
+                            <goal>single</goal>
+                        </goals>
+                        <configuration>
+                            <finalName>rest-api-${project.version}</finalName>
+                            <appendAssemblyId>false</appendAssemblyId>
+                            <descriptors>
+                                <descriptor>src/main/assembly/assembly.xml</descriptor>
+                            </descriptors>
+                        </configuration>
+                    </execution>
+                </executions>
+            </plugin>
+        </plugins>
+    </build>
+</project>

abstracto-application/rest-api/src/main/assembly/assembly.xml

@@ -0,0 +1,19 @@
+<assembly xmlns="http://maven.apache.org/plugins/maven-assembly-plugin/assembly/1.1.2"
+          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+          xsi:schemaLocation="http://maven.apache.org/plugins/maven-assembly-plugin/assembly/1.1.2 http://maven.apache.org/xsd/assembly-1.1.2.xsd">
+    <id>zip</id>
+    <includeBaseDirectory>false</includeBaseDirectory>
+    <formats>
+        <format>zip</format>
+    </formats>
+    <fileSets>
+        <fileSet>
+            <outputDirectory>resources</outputDirectory>
+            <directory>${project.basedir}/src/main/resources</directory>
+        </fileSet>
+        <fileSet>
+            <outputDirectory>.</outputDirectory>
+            <directory>${project.basedir}/src/main/python</directory>
+        </fileSet>
+    </fileSets>
+</assembly>

abstracto-application/rest-api/src/main/python/base/image_gen.py

@@ -0,0 +1,18 @@
+from __main__ import app
+
+from PIL import Image, ImageDraw, ImageFont
+from flask import request
+
+from utils import flask_utils
+
+@app.route('/memes/doge/orangeSun/')
+def image_gen():
+    text = request.args.get('text')
+    with Image.open('resources/img/semf_template.jpg') as im:
+        d1 = ImageDraw.Draw(im)
+        text_box_size = (300, 240)
+        W, H = text_box_size
+        font = ImageFont.truetype(f'Impact.ttf', 60)
+        _, _, w, h = d1.textbbox((0, 0), text, font=font)
+        d1.text(((W-w)/2 + 320, (H-h)/2 + 120), text, font=font, fill=(255, 255, 255))
+        return flask_utils.serve_pil_image(im)

abstracto-application/rest-api/src/main/python/main.py

@@ -0,0 +1,61 @@
+import logging
+import os
+
+from flask import Flask
+import importlib
+
+FORMAT = '%(asctime)s - %(name)s - %(levelname)s - %(message)s'
+logging.basicConfig(encoding='utf-8', level=logging.INFO, format=FORMAT)
+template_dir = os.path.abspath('resources/templates')
+app = Flask(__name__, template_folder=template_dir)
+
+import sys
+sys.path.append("..")
+# loads the api end points
+from base import image_gen
+
+# This code was only done, because "from custom import *" did not work, it seems it did not execute the code in it
+# while the code was valid
+# https://stackoverflow.com/questions/57878744/how-do-i-dynamically-import-all-py-files-from-a-given-directory-and-all-sub-di
+def get_py_files(src):
+    cwd = os.getcwd()
+    py_files = []
+    for root, dirs, files in os.walk(src):
+        for file in files:
+            if file.endswith(".py"):
+                py_files.append(os.path.join(cwd, root, file))
+    return py_files
+
+
+def dynamic_import(module_name, py_path):
+    module_spec = importlib.util.spec_from_file_location(module_name, py_path)
+    module = importlib.util.module_from_spec(module_spec)
+    module_spec.loader.exec_module(module)
+    return module
+
+
+def dynamic_import_from_src(src, star_import=False):
+    my_py_files = get_py_files(src)
+    for py_file in my_py_files:
+        module_name = os.path.split(py_file)[-1].strip(".py")
+        imported_module = dynamic_import(module_name, py_file)
+        if star_import:
+            for obj in dir(imported_module):
+                globals()[obj] = imported_module.__dict__[obj]
+        else:
+            globals()[module_name] = imported_module
+    return
+
+
+if __name__ == "__main__":
+    dynamic_import_from_src("custom", star_import=False)
+
+@app.route('/')
+def hello():
+    return 'Hello, World?'
+
+
+if __name__ == "__main__":
+    from waitress import serve
+
+    serve(app, host="0.0.0.0", port=8080)

abstracto-application/rest-api/src/main/python/utils/flask_utils.py

@@ -0,0 +1,17 @@
+from io import BytesIO
+
+from flask import send_file
+
+
+def serve_pil_image(pil_img):
+    img_io = BytesIO()
+    pil_img.save(img_io, 'PNG')
+    img_io.seek(0)
+    return send_file(img_io, mimetype='image/png')
+
+
+class ValidationException(Exception):
+    def __init__(self, provided_value, message):
+        self.provided_value = provided_value
+        self.message = message
+        super().__init__(f'{self.message}: provided value: {provided_value}')