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 { margin-bottom: 2em; }
  14 th, td { text-align: left; }
  15 td.number { text-align: right; }
  16 input[type="number"] { text-align: right; }
  17 </style>""" + f"""
  18 <body>
  19 <form action="/" method="POST">
  20 <td><input name="update" type="submit" value="update" /></td>
  21 <table>
  22 <tr><th>eatable</th><th>unit count</th><th>unit weight (g)</th><th>calories</th><th>sugar (g)</th></tr>
  23 {consumption_rows}
  24 <tr>
  25 <th>add from DB:</th>
  26 </tr>
  27 <tr>
  28 <input type="hidden" name="keep_visible" value="0">
  29 <td><select name="eatable_key">{eatables_selection}</select></td>
  30 <td class="number"><input class="unit_count" name="unit_count" type="number" step="0.1" min="0" value="0" /></td>
  31 <td></td>
  32 </tr>
  33 </table>
  34 <table>
  35 <tr><th>day</th><th>calories</th><th>sugar (g)</th></tr>
  36 {day_rows}
  37 </table>
  38 <table>
  39 <tr><th>title</th><th>calories</th><th>sugar (g)</th><th>standard weight (g)</th><th>comments</th><th>delete</th></tr>
  40 {eatable_rows}
  41 <tr>
  42 <th>add:</th>
  43 </tr>
  44 <tr>
  45 <td><input name="title" type="text" value="" /></td>
  46 <td class="number"><input name="cals" type="number" min="0" step="0.1" value="0" /></td>
  47 <td class="number"><input name="sugar_g" type="number" min="0" step="0.1" value="0" /></td>
  48 <td class="number"><input name="standard_g" type="number" min="1" step="0.1" value="1" /></td>
  49 <td><input name="comments" type="text" value="" /></td>
  50 </tr>
  51 </table>
  52 </form>
  53 </body>
  54 <script>
  55 """ + """
  56 var unit_count_inputs = document.getElementsByClassName("unit_count");
  57 for (let i = 0; i < unit_count_inputs.length; i++) {
  58     let input = unit_count_inputs[i];
  59     let button = document.createElement('button');
  60     button.innerHTML = '+1';
  61     button.onclick = function(event) {
  62         event.preventDefault();
  63         input.value = parseFloat(input.value) + 1.0;
  64     };
  65     input.insertAdjacentElement('afterend', button);
  66 }
  67
  68 </script>
  69 </html>
  70 """
  71
  72 class LockFileDetected(Exception):
  73     pass
  74
  75 class Eatable:
  76
  77     def __init__(self, title, cals, sugar_g, standard_g=100, comments="", popularity=0):
  78         self.title = title
  79         self.cals = cals  # per 100g
  80         self.sugar_g = sugar_g  # per 100g
  81         self.standard_g = standard_g  # common unit weight
  82         self.comments = comments
  83         self.popularity = popularity
  84
  85     def to_dict(self):
  86         return {
  87             "title": self.title,
  88             "cals": self.cals,
  89             "sugar_g": self.sugar_g,
  90             "standard_g": self.standard_g,
  91             "comments": self.comments,
  92             "popularity": self.popularity
  93         }
  94
  95 class Consumption:
  96
  97     def __init__(self, eatable_key, unit_count=None, keep_visible=0):
  98         self.eatable_key = eatable_key
  99         self.unit_count = unit_count
 100         self.keep_visible = keep_visible
 101
 102     def to_dict(self):
 103         return {
 104             "eatable_key": self.eatable_key,
 105             "unit_count": self.unit_count,
 106             "keep_visible": self.keep_visible
 107         }
 108
 109 class Day:
 110
 111     def __init__(self, calories, sugar_g):
 112         self.calories = calories
 113         self.sugar_g = sugar_g
 114
 115     def to_dict(self):
 116         return {
 117             "calories": self.calories,
 118             "sugar_g": self.sugar_g,
 119         }
 120
 121 class Database:
 122
 123     def __init__(self, load_from_file=True):
 124         db_name = "calories_db"
 125         self.db_file = db_name + ".json"
 126         self.lock_file = db_name+ ".lock"
 127         self.eatables = {}
 128         self.consumptions = []
 129         self.days = {}
 130         self.today = Day(0, 0)
 131         self.today_date = ""
 132         if load_from_file and os.path.exists(self.db_file):
 133             with open(self.db_file, "r") as f:
 134                 self.from_dict(json.load(f))
 135
 136     def from_dict(self, d):
 137         self.set_today_date(d["today_date"])
 138         for k,v in d["eatables"].items():
 139             self.add_eatable(k, Eatable(v["title"], v["cals"], v["sugar_g"], v["standard_g"], v["comments"]))
 140         for c in d["consumptions"]:
 141             self.add_consumption(Consumption(c["eatable_key"], c["unit_count"]))
 142         for k,v in d["days"].items():
 143             self.add_day(k, Day(v["calories"], v["sugar_g"]))
 144
 145     def to_dict(self):
 146         d = {"eatables": {}, "consumptions": [], "days":{}, "today_date":self.today_date}
 147         for k,v in self.eatables.items():
 148             d["eatables"][k] = v.to_dict()
 149         for c in self.consumptions:
 150             d["consumptions"] += [c.to_dict()]
 151         for k,v in self.days.items():
 152             d["days"][k] = v.to_dict()
 153         return d
 154
 155     def calc_consumption(self, c):
 156         eatable = self.eatables[c.eatable_key]
 157         calories = eatable.cals * c.unit_count
 158         sugar_g = eatable.sugar_g * c.unit_count
 159         self.today.calories += calories
 160         self.today.sugar_g += sugar_g
 161         return {"cals": calories, "sugar": sugar_g }
 162
 163     def eatables_selection(self):
 164         html = ''
 165         already_selected = [c.eatable_key for c in self.consumptions]
 166         for k, v in sorted(self.eatables.items(), key=lambda item: item[1].title):
 167             if k in already_selected:
 168                 continue
 169             v = self.eatables[k]
 170             html += '<option value="%s">%s</option>' % (k, v.title)
 171         return html
 172
 173     def add_eatable(self, id_, eatable):
 174         self.eatables[id_] = eatable
 175
 176     def add_consumption(self, consumption):
 177         self.consumptions += [consumption]
 178
 179     def add_day(self, date, day, archives_today=False):
 180         if archives_today:
 181             date = date + str(datetime.datetime.now())[10:]
 182         self.days[date] = day
 183
 184     def set_today_date(self, today_date):
 185         self.today_date = today_date
 186
 187     def delete(self, id_):
 188         del self.eatables[id_]
 189
 190     def write(self):
 191         import shutil
 192         if os.path.exists(self.lock_file):
 193             raise LockFileDetected
 194         if os.path.exists(self.db_file):
 195             shutil.copy(self.db_file, self.db_file + ".bak")
 196         f = open(self.lock_file, "w+")
 197         f.close()
 198         with open(self.db_file, "w") as f:
 199             json.dump(self.to_dict(), f)
 200         os.remove(self.lock_file)
 201
 202
 203 class MyServer(BaseHTTPRequestHandler):
 204
 205     def do_POST(self):
 206         from uuid import uuid4
 207         from urllib.parse import parse_qs
 208         length = int(self.headers['content-length'])
 209         postvars = parse_qs(self.rfile.read(length).decode(), keep_blank_values=1)
 210         db = Database(False)
 211         def decode(key, i, is_num=True):
 212             if is_num:
 213                 return float(postvars[key][i])
 214             return postvars[key][i]
 215         to_delete = []
 216         if 'delete' in postvars.keys():
 217             for target in postvars['delete']:
 218                 to_delete += [target]
 219         i = 0
 220         if 'eatable_uuid' in postvars.keys():
 221             for uuid_encoded in postvars['eatable_uuid']:
 222                 uuid = uuid_encoded
 223                 if uuid not in to_delete:
 224                     e = Eatable(decode("title", i, False), decode("cals", i), decode("sugar_g", i), decode("standard_g", i), decode("comments", i, False))
 225                     db.add_eatable(uuid, e)
 226                 i += 1
 227         if 'title' in postvars.keys() and len(postvars['title'][i]) > 0:
 228              e = Eatable(decode("title", i, False), decode("cals", i), decode("sugar_g", i), decode("standard_g", i), decode("comments", i, False))
 229              db.add_eatable(str(uuid4()), e)
 230         i = 0
 231         if 'eatable_key' in postvars.keys():
 232             for eatable_key in postvars['eatable_key']:
 233                 c = Consumption(decode("eatable_key", i, False), decode("unit_count", i), decode("keep_visible", i))
 234                 i += 1
 235                 if c.unit_count == 0 and c.keep_visible == 0:
 236                     continue
 237                 db.add_consumption(c)
 238         i = 0
 239         if 'day_date' in postvars.keys():
 240             for date in postvars['day_date']:
 241                 db.add_day((date), Day(decode("day_cals", i), decode("day_sugar", i)))
 242                 i += 1
 243         if 'new_date' in postvars.keys():
 244             db.set_today_date(postvars["new_date"][0])
 245         if 'archive_day' in postvars.keys():
 246             new_cals = postvars["new_day_cals"][0]
 247             new_sugar = postvars["new_day_sugar"][0]
 248             db.add_day(db.today_date, Day(float(new_cals), float(new_sugar)), archives_today=True)
 249             db.set_today_date(str(datetime.datetime.now())[:10])
 250             for c in db.consumptions:
 251                 if c.unit_count > 0:
 252                     db.eatables[c.eatable_key].popularity += 1
 253             db.consumptions = []
 254             default_slots = 10
 255             for k, v in sorted(db.eatables.items(), key=lambda item: -item[1].popularity):
 256                 db.add_consumption(Consumption(k, 0))
 257                 default_slots -= 1
 258                 if (default_slots <= 0):
 259                     break
 260         try:
 261             db.write()
 262             self.send_response(302)
 263             self.send_header('Location', '/')
 264             self.end_headers()
 265         except LockFileDetected:
 266             self.send_response(400)
 267             self.end_headers()
 268             self.wfile.write(bytes("Sorry, lock file!", "utf-8"))
 269
 270     def do_GET(self):
 271         self.send_response(200)
 272         self.send_header("Content-type", "text/html")
 273         self.end_headers()
 274         db = Database()
 275
 276         eatables = ""
 277         for k,v in db.eatables.items():
 278             eatables += "<tr>"\
 279                     "<input name=\"eatable_uuid\" type=\"hidden\" value=\"%s\" />"\
 280                     "<td><input name=\"title\" value=\"%s\" /></td>"\
 281                     "<td class\"number\"><input name=\"cals\" type=\"number\" step=\"0.1\" min=\"0\" value=\"%.1f\" /></td>"\
 282                     "<td class\"number\"><input name=\"sugar_g\" type=\"number\" step=\"0.1\" min=\"0\" value=\"%.1f\" /></td>"\
 283                     "<td class\"number\"><input name=\"standard_g\" type=\"number\" step=\"0.1\" min=\"1\" value=\"%1.f\" /></td>"\
 284                     "<td><input name=\"comments\" value=\"%s\" /></td>"\
 285                     "<td><input name=\"delete\" type=\"checkbox\" value=\"%s\" /></td>"\
 286                     "</tr>" % (k, v.title, v.cals, v.sugar_g, v.standard_g, v.comments, k)
 287         consumptions = ""
 288         db.consumptions = sorted(db.consumptions, key=lambda x: db.eatables[x.eatable_key].title)
 289         for c in db.consumptions:
 290             r = db.calc_consumption(c)
 291             consumptions += "<tr />"\
 292                     "<input type=\"hidden\" name=\"keep_visible\" value=\"1\"><input name=\"eatable_key\" type=\"hidden\" value=\"%s\">"\
 293                     "<td>%s</td>"\
 294                     "<td class\"number\"><input class=\"unit_count number\" name=\"unit_count\" type=\"number\" min=\"0\" step=\"0.1\" value=\"%.1f\" /></td>"\
 295                     "<td></td>"\
 296                     "<td class=\"number\">%.1f</td>"\
 297                     "<td class=\"number\">%.1f</td>"\
 298                     "</tr>" % (c.eatable_key, db.eatables[c.eatable_key].title, c.unit_count, r["cals"], r["sugar"])
 299         day_rows = ""
 300         for date in sorted(db.days.keys()):
 301             day = db.days[date]
 302             day_rows = "<tr>"\
 303                     "<td><input name=\"day_date\" type=\"hidden\" value=\"%s\" />%s</td>"\
 304                     "<td class=\"number\"><input name=\"day_cals\" type=\"hidden\" step=\"0.1\" min=\"0\" value=\"%.1f\" />%.1f</td>"\
 305                     "<td class=\"number\"><input name=\"day_sugar\" type=\"hidden\" step=\"0.1\" min=\"0\" value=\"%.1f\" />%.1f</td>"\
 306                     "</tr>" % (date, date[:10], day.calories, day.calories, day.sugar_g, day.sugar_g) + day_rows
 307         day_rows = "<tr>"\
 308                 "<th>today:</th><th></th><th></th><th>archive?</th>"\
 309                 "</tr>"\
 310                 "<tr>"\
 311                 "<td><input name=\"new_date\" size=8 value=\"%s\" /></td>"\
 312                 "<td class=\"number\"><input name=\"new_day_cals\" type=\"hidden\" value=\"%.1f\" readonly />%.1f</td>"\
 313                 "<td class=\"number\"><input name=\"new_day_sugar\" type=\"hidden\" value=\"%.1f\" readonly />%.1f</td>"\
 314                 "<td><input name=\"archive_day\" type=\"checkbox\" /></td>"\
 315                 "</tr>" % (db.today_date, db.today.calories, db.today.calories, db.today.sugar_g, db.today.sugar_g) + day_rows
 316         page = build_page(eatables, consumptions, db.eatables_selection(), day_rows)
 317         self.wfile.write(bytes(page, "utf-8"))
 318
 319
 320 if __name__ == "__main__":
 321     webServer = HTTPServer((hostName, serverPort), MyServer)
 322     print(f"Server started http://{hostName}:{serverPort}")
 323     try:
 324         webServer.serve_forever()
 325     except KeyboardInterrupt:
 326         pass
 327     webServer.server_close()
 328     print("Server stopped.")