From c35389d77608fa78affe4eee331970897707bc97 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Gabriel=20P=C3=A9rez-Cerezo?= <gabriel@gpcf.eu>
Date: Fri, 6 Jul 2018 17:34:38 +0200
Subject: first commit

---
 hemiptera_avatar_gen.py | 52 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 52 insertions(+)
 create mode 100644 hemiptera_avatar_gen.py

(limited to 'hemiptera_avatar_gen.py')

diff --git a/hemiptera_avatar_gen.py b/hemiptera_avatar_gen.py
new file mode 100644
index 0000000..db380a9
--- /dev/null
+++ b/hemiptera_avatar_gen.py
@@ -0,0 +1,52 @@
+import hashlib
+import random
+from PIL import Image, ImageDraw
+from hemiptera_common import *
+import os
+
+SERVER_SALT="foobar"
+
+D = 7
+pixel_width=1
+def hash_generator(h) :
+    index = 0
+    while True :
+        yield int(h[index],16)
+        index +=1
+        if index == len(h) : ## Keep images interesting if size is significantly larger than hash input
+            index = 0
+            h = hashlib.sha1(h.encode()).hexdigest()
+
+
+def gen_color(h) :
+    return  tuple(tuple(next(h)*16 for i in range(3)) for i in range(2))
+
+def gen_image(h) :
+    h = hash_generator(h)
+    c1, c2 = gen_color(h)
+    im = Image.new("RGBA", (D,D))
+    draw = ImageDraw.Draw(im)
+    index = 0
+    for i in range(D//2+1) :
+        for j in range(D) :
+            k = next(h)
+            if k % 2 or k//2 % 2 :
+                if k % 2 :
+                    color = c1
+                else :
+                    color = c2
+                draw.point([(i,j), (D-1-i,j)], fill=color)
+    return im
+
+
+def generate_avatar(email) :
+    if email is None :
+        email = ""
+    h = hashlib.sha1(str(email+SERVER_SALT).encode()).hexdigest()
+    imgpath = opj(basedir, "export", "static")
+    img = gen_image(h)
+    os.makedirs(imgpath, exist_ok=True)
+    img.save(opj(imgpath, h+".png"))
+    return "/static/" + h+".png"
+
+
-- 
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