#25 Public reports

* adds public report rendering for intervention model
* adds new routes for report
* adds new public_base.html and public_navbar.html
* adds lookup table for zoom levels for lanis link generating
* moves qr code generating into utils/generators.py

konova/settings.py

@@ -69,3 +69,14 @@ ETS_GROUP = "Conservation office"
 # Needed to redirect to LANIS
 ## Values to be inserted are [zoom_level, x_coord, y_coord]
 LANIS_LINK_TEMPLATE = "https://geodaten.naturschutz.rlp.de/kartendienste_naturschutz/index.php?lang=de&zl={}&x={}&y={}&bl=tk_rlp_tms_grau&bo=1&lo=0.8,0.8,0.8,0.6,0.8,0.8,0.8,0.8,0.8&layers=eiv_f,eiv_l,eiv_p,kom_f,kom_l,kom_p,oek_f,ema_f,mae&service=kartendienste_naturschutz"
+## This look up table (LUT) defines different zoom levels on the size of the calculate area of a geometry.
+LANIS_ZOOM_LUT = {
+    1000000000: 6,
+    100000000: 10,
+    10000000: 17,
+    1000000: 20,
+    100000: 25,
+    10000: 28,
+    1000: 30,
+    500: 31,
+}

konova/utils/generators.py

@@ -7,6 +7,10 @@ Created on: 09.11.20
 """
 import random
 import string
+import qrcode
+import qrcode.image.svg
+
+from io import BytesIO
 
 
 def generate_random_string(length: int, use_numbers: bool = False, use_letters_lc: bool = False, use_letters_uc: bool = False) -> str:
@@ -24,3 +28,24 @@ def generate_random_string(length: int, use_numbers: bool = False, use_letters_l
     elements = "".join(elements)
     ret_val = "".join(random.choice(elements) for i in range(length))
     return ret_val
+
+
+def generate_qr_code(content: str, size: int = 20) -> str:
+    """ Generates a qr code from given content
+
+    Args:
+        content (str): The content for the qr code
+        size (int): The image size
+
+    Returns:
+        qrcode_svg (str): The qr code as svg
+    """
+    qrcode_factory = qrcode.image.svg.SvgImage
+    qrcode_img = qrcode.make(
+        content,
+        image_factory=qrcode_factory,
+        box_size=size
+    )
+    stream = BytesIO()
+    qrcode_img.save(stream)
+    return stream.getvalue().decode()