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