plomlompom.com Git - misc/blob - calories.py

   1 from http.server import BaseHTTPRequestHandler, HTTPServer
   2 import os
   3 import json
   4 import datetime
   5
   6 def build_page(eatable_rows, consumption_rows, eatables_selection, day_rows):
   7     return """<html>
   8 <meta charset="UTF-8">
   9 <style>
  10 table {
  11   margin-bottom: 2em;
  12 }
  13 td, th {
  14   text-align: right;
  15 }
  16 </style>""" + f"""
  17 <body>
  18 <form action="/" method="POST">
  19 <td><input name="update" type="submit" value="update" /></td>
  20 <table>
  21 <tr><th>eatable</th><th>unit count</th><th>unit weight (g)</th><th>calories</th><th>sugar (g)</th></tr>
  22 {consumption_rows}
  23 <tr>
  24 <th>add from DB:</th>
  25 </tr>
  26 <tr>
  27 <input type="hidden" name="keep_visible" value="0">
  28 <td><select name="eatable_key">{eatables_selection}</select></td>
  29 <td><input class="unit_count" name="unit_count" type="number" step="1" min="0" value="0" /></td>
  30 <td></td>
  31 </tr>
  32 </table>
  33 <table>
  34 <tr><th>day</th><th>calories</th><th>sugar (g)</th></tr>
  35 {day_rows}
  36 </table>
  37 <table>
  38 <tr><th>title</th><th>calories</th><th>sugar (g)</th><th>standard weight (g)</th><th>comments</th><th>delete</th></tr>
  39 {eatable_rows}
  40 <tr>
  41 <th>add:</th>
  42 </tr>
  43 <tr>
  44 <td><input name="title" type="text" value="" /></td>
  45 <td><input name="cals" type="number" min="0" step="0.1" value="0" /></td>
  46 <td><input name="sugar_g" type="number" min="0" step="0.1" value="0" /></td>
  47 <td><input name="standard_g" type="number" min="1" step="0.1" value="1" /></td>
  48 <td><input name="comments" type="text" value="" /></td>
  49 </tr>
  50 </table>
  51 </form>
  52 </body>
  53 <script>
  54 """ + """
  55 var unit_count_inputs = document.getElementsByClassName("unit_count");
  56 for (let i = 0; i < unit_count_inputs.length; i++) {
  57     let input = unit_count_inputs[i];
  58     let button = document.createElement('button');
  59     button.innerHTML = '+1';
  60     button.onclick = function(event) {
  61         event.preventDefault();
  62         input.value = parseInt(input.value) + 1;
  63     };
  64     input.insertAdjacentElement('afterend', button);
  65 }
  66
  67 </script>
  68 </html>
  69 """
  70
  71 class LockFileDetected(Exception):
  72     pass
  73
  74 class Eatable:
  75
  76     def __init__(self, title, cals, sugar_g, standard_g=100, comments="", popularity=0):
  77         self.title = title
  78         self.cals = cals  # per 100g
  79         self.sugar_g = sugar_g  # per 100g
  80         self.standard_g = standard_g  # common unit weight
  81         self.comments = comments
  82         self.popularity = popularity
  83
  84     def to_dict(self):
  85         return {
  86             "title": self.title,
  87             "cals": self.cals,
  88             "sugar_g": self.sugar_g,
  89             "standard_g": self.standard_g,
  90             "comments": self.comments,
  91             "popularity": self.popularity
  92         }
  93
  94 class Consumption:
  95
  96     def __init__(self, eatable_key, unit_count=None, keep_visible=0):
  97         self.eatable_key = eatable_key
  98         self.unit_count = unit_count
  99         self.keep_visible = keep_visible
 100
 101     def to_dict(self):
 102         return {
 103             "eatable_key": self.eatable_key,
 104             "unit_count": self.unit_count,
 105             "keep_visible": self.keep_visible
 106         }
 107
 108 class Day:
 109
 110     def __init__(self, calories, sugar_g):
 111         self.calories = calories
 112         self.sugar_g = sugar_g
 113
 114     def to_dict(self):
 115         return {
 116             "calories": self.calories,
 117             "sugar_g": self.sugar_g,
 118         }
 119
 120 class Database:
 121
 122     def __init__(self, load_from_file=True):
 123         db_name = "calories_db"
 124         self.db_file = db_name + ".json"
 125         self.lock_file = db_name+ ".lock"
 126         self.eatables = {}
 127         self.consumptions = []
 128         self.days = {}
 129         self.today = Day(0, 0)
 130         self.today_date = ""
 131         if load_from_file and os.path.exists(self.db_file):
 132             with open(self.db_file, "r") as f:
 133                 self.from_dict(json.load(f))
 134
 135     def from_dict(self, d):
 136         self.set_today_date(d["today_date"])
 137         for k,v in d["eatables"].items():
 138             self.add_eatable(k, Eatable(v["title"], v["cals"], v["sugar_g"], v["standard_g"], v["comments"]))
 139         for c in d["consumptions"]:
 140             self.add_consumption(Consumption(c["eatable_key"], c["unit_count"]))
 141         for k,v in d["days"].items():
 142             self.add_day(k, Day(v["calories"], v["sugar_g"]))
 143
 144     def to_dict(self):
 145         d = {"eatables": {}, "consumptions": [], "days":{}, "today_date":self.today_date}
 146         for k,v in self.eatables.items():
 147             d["eatables"][k] = v.to_dict()
 148         for c in self.consumptions:
 149             d["consumptions"] += [c.to_dict()]
 150         for k,v in self.days.items():
 151             d["days"][k] = v.to_dict()
 152         return d
 153
 154     def calc_consumption(self, c):
 155         eatable = self.eatables[c.eatable_key]
 156         calories = eatable.cals * c.unit_count
 157         sugar_g = eatable.sugar_g * c.unit_count
 158         # calories = float(eatable.cals / eatable.standard_g) * c.unit_count * c.unit_weight
 159         # sugar_g = float(eatable.sugar_g / eatable.standard_g) * c.unit_count * c.unit_weight
 160         self.today.calories += calories
 161         self.today.sugar_g += sugar_g
 162         return {"cals": calories, "sugar": sugar_g }
 163
 164     def eatables_selection(self, selection=None):
 165         html = ''
 166         for k, v in sorted(self.eatables.items(), key=lambda item: item[1].title):
 167             v = self.eatables[k]
 168             selected = ' selected' if k==selection else ''
 169             html += '<option value="%s"%s>%s</option>' % (k, selected, v.title)
 170         return html
 171
 172     def add_eatable(self, id_, eatable):
 173         self.eatables[id_] = eatable
 174
 175     def add_consumption(self, consumption):
 176         self.consumptions += [consumption]
 177
 178     def add_day(self, date, day, archives_today=False):
 179         if archives_today:
 180             date = date + str(datetime.datetime.now())[10:]
 181         self.days[date] = day
 182
 183     def set_today_date(self, today_date):
 184         self.today_date = today_date
 185
 186     def delete(self, id_):
 187         del self.eatables[id_]
 188
 189     def write(self):
 190         import shutil
 191         if os.path.exists(self.lock_file):
 192             raise LockFileDetected
 193         if os.path.exists(self.db_file):
 194             shutil.copy(self.db_file, self.db_file + ".bak")
 195         f = open(self.lock_file, "w+")
 196         f.close()
 197         with open(self.db_file, "w") as f:
 198             json.dump(self.to_dict(), f)
 199         os.remove(self.lock_file)
 200
 201
 202 class MyServer(BaseHTTPRequestHandler):
 203
 204     def do_POST(self):
 205         from uuid import uuid4
 206         from urllib.parse import parse_qs
 207         length = int(self.headers['content-length'])
 208         postvars = parse_qs(self.rfile.read(length).decode(), keep_blank_values=1)
 209         db = Database(False)
 210         def decode(key, i, is_num=True):
 211             if is_num:
 212                 return float(postvars[key][i])
 213             return postvars[key][i]
 214         to_delete = []
 215         if 'delete' in postvars.keys():
 216             for target in postvars['delete']:
 217                 to_delete += [target]
 218         i = 0
 219         if 'eatable_uuid' in postvars.keys():
 220             for uuid_encoded in postvars['eatable_uuid']:
 221                 uuid = uuid_encoded
 222                 if uuid not in to_delete:
 223                     e = Eatable(decode("title", i, False), decode("cals", i), decode("sugar_g", i), decode("standard_g", i), decode("comments", i, False))
 224                     db.add_eatable(uuid, e)
 225                 i += 1
 226         if 'title' in postvars.keys() and len(postvars['title'][i]) > 0:
 227              e = Eatable(decode("title", i, False), decode("cals", i), decode("sugar_g", i), decode("standard_g", i), decode("comments", i, False))
 228              db.add_eatable(str(uuid4()), e)
 229         i = 0
 230         if 'eatable_key' in postvars.keys():
 231             for eatable_key in postvars['eatable_key']:
 232                 c = Consumption(decode("eatable_key", i, False), decode("unit_count", i), decode("keep_visible", i))
 233                 i += 1
 234                 if c.unit_count == 0 and c.keep_visible == 0:
 235                     continue
 236                 db.add_consumption(c)
 237         i = 0
 238         if 'day_date' in postvars.keys():
 239             for date in postvars['day_date']:
 240                 db.add_day((date), Day(decode("day_cals", i), decode("day_sugar", i)))
 241                 i += 1
 242         if 'new_date' in postvars.keys():
 243             db.set_today_date(postvars["new_date"][0])
 244         if 'archive_day' in postvars.keys():
 245             new_cals = postvars["new_day_cals"][0]
 246             new_sugar = postvars["new_day_sugar"][0]
 247             db.add_day(db.today_date, Day(float(new_cals), float(new_sugar)), archives_today=True)
 248             db.set_today_date(str(datetime.datetime.now())[:10])
 249             for c in db.consumptions:
 250                 if c.unit_count > 0:
 251                     db.eatables[c.eatable_key].popularity += 1
 252             db.consumptions = []
 253             default_slots = 7
 254             for k, v in sorted(db.eatables.items(), key=lambda item: -item[1].popularity):
 255                 db.add_consumption(Consumption(k, 0))
 256                 default_slots -= 1
 257                 if (default_slots <= 0):
 258                     break
 259         try:
 260             db.write()
 261             self.send_response(302)
 262             self.send_header('Location', '/')
 263             self.end_headers()
 264         except LockFileDetected:
 265             self.send_response(400)
 266             self.end_headers()
 267             self.wfile.write(bytes("Sorry, lock file!", "utf-8"))
 268
 269     def do_GET(self):
 270         self.send_response(200)
 271         self.send_header("Content-type", "text/html")
 272         self.end_headers()
 273         db = Database()
 274
 275         eatables = ""
 276         for k,v in db.eatables.items():
 277             eatables += "<tr>"\
 278                     "<input name=\"eatable_uuid\" type=\"hidden\" value=\"%s\" />"\
 279                     "<td><input name=\"title\" value=\"%s\" /></td>"\
 280                     "<td><input name=\"cals\" type=\"number\" step=\"0.1\" min=\"0\" value=\"%.1f\" /></td>"\
 281                     "<td><input name=\"sugar_g\" type=\"number\" step=\"0.1\" min=\"0\" value=\"%.1f\" /></td>"\
 282                     "<td><input name=\"standard_g\" type=\"number\" step=\"0.1\" min=\"1\" value=\"%1.f\" /></td>"\
 283                     "<td><input name=\"comments\" value=\"%s\" /></td>"\
 284                     "<td><input name=\"delete\" type=\"checkbox\" value=\"%s\" /></td>"\
 285                     "</tr>" % (k, v.title, v.cals, v.sugar_g, v.standard_g, v.comments, k)
 286         consumptions = ""
 287         for c in db.consumptions:
 288             r = db.calc_consumption(c)
 289             consumptions += "<tr />"\
 290                     "<input type=\"hidden\" name=\"keep_visible\" value=\"1\">"\
 291                     "<td><select name=\"eatable_key\">%s</select></td>"\
 292                     "<td><input class=\"unit_count\" name=\"unit_count\" type=\"number\" min=\"0\" value=\"%d\" /></td>"\
 293                     "<td></td>"\
 294                     "<td>%.1f</td>"\
 295                     "<td>%.1f</td>"\
 296                     "</tr>" % (db.eatables_selection(c.eatable_key), c.unit_count, r["cals"], r["sugar"])
 297         day_rows = ""
 298         for date, day in db.days.items():
 299             day_rows += "<tr>"\
 300                     "<td><input name=\"day_date\" type=\"hidden\" value=\"%s\" />%s</td>"\
 301                     "<td><input name=\"day_cals\" type=\"hidden\" step=\"0.1\" min=\"0\" value=\"%.1f\" />%.1f</td>"\
 302                     "<td><input name=\"day_sugar\" type=\"hidden\" step=\"0.1\" min=\"0\" value=\"%.1f\" />%.1f</td>"\
 303                     "</tr>" % (date, date[:10], day.calories, day.calories, day.sugar_g, day.sugar_g)
 304         day_rows += "<tr>"\
 305                 "<th>today:</th><th></th><th></th><th>archive?</th>"\
 306                 "</tr>"\
 307                 "<tr>"\
 308                 "<td><input name=\"new_date\" size=8 value=\"%s\" /></td>"\
 309                 "<td><input name=\"new_day_cals\" type=\"hidden\" value=\"%.1f\" readonly />%.1f</td>"\
 310                 "<td><input name=\"new_day_sugar\" type=\"hidden\" value=\"%.1f\" readonly />%.1f</td>"\
 311                 "<td><input name=\"archive_day\" type=\"checkbox\" /></td>"\
 312                 "</tr>" % (db.today_date, db.today.calories, db.today.calories, db.today.sugar_g, db.today.sugar_g)
 313         page = build_page(eatables, consumptions, db.eatables_selection(), day_rows)
 314         self.wfile.write(bytes(page, "utf-8"))
 315
 316
 317 hostName = "localhost"
 318 serverPort = 8081
 319 if __name__ == "__main__":
 320     webServer = HTTPServer((hostName, serverPort), MyServer)
 321     print("Server started http://%s:%s" % (hostName, serverPort))
 322     try:
 323         webServer.serve_forever()
 324     except KeyboardInterrupt:
 325         pass
 326     webServer.server_close()
 327     print("Server stopped.")