fixed conflict

rv_voting_calc/templates/rv_voting_calc/index.html

+{% extends "shared/base.html" %}
+
+{% load render_bundle from webpack_loader %}
+
+{% block title %}Kalkulačka hlasování RV{% endblock %}
+{% block header_name %}Hlasování RV{% endblock %}
+{% block description %}TODO - Popis{% endblock %}
+
+{% block head %}
+    {% render_bundle "rv_voting_calc" %}
+
+    <link
+        href="https://styleguide.pirati.cz/2.10.x/css/styles.css"
+        rel="stylesheet"
+        media="all"
+    >
+    <link
+        href="https://styleguide.pirati.cz/2.10.x/css/pattern-scaffolding.css"
+        rel="stylesheet"
+        media="all"
+    >
+{% endblock %}
+
+{% block content %}
+    <main>
+        <h1 class="text-6xl font-bebas mb-5">Kalkulačka hlasování RV</h1>
+
+        <p class="mb-5 text-gray-800">
+            Jednací řád k nahlédnutí <a
+                class="underline"
+                href="https://wiki.pirati.cz/rules/jrrv#rozhodujici_hlasovani_pri_referendu"
+            >na wiki</a>, § 9 (3).
+        </p>
+
+        <div class="grid grid-cols-1 md:grid-cols-2 gap-7">
+            <div>
+                <div class="flex items-center h-10 mb-5">
+                    <h2 class="text-2xl font-bebas">Hlasy členů</h2>
+                </div>
+
+                <ul class="flex flex-col gap-2">
+                    {% for member in rv_members %}
+                        <li class="flex gap-4 items-center">
+                            <div class="basis-56 flex items-center">
+                                <i class="ico--user text-xl mr-2"></i>
+                                {{ member.displayName }}
+                            </div>
+                            <select
+                                id="{{ member.username }}-selection"
+                                class="__vote-selection grow w-full"
+                                multiple="multiple"
+                            ></select>
+                        </li>
+                    {% endfor %}
+                </ul>
+            </div>
+            
+            <div>
+                <div class="flex items-center gap-3 justify-between mb-5">
+                    <h2 class="text-2xl font-bebas">Výsledky</h2>
+                    <button
+                        class="btn disabled:cursor-progress"
+                        id="count-votes"
+                        {% if not options_by_member %}disabled{% endif %}
+                    >
+                        <div class="btn__body">
+                            Vypočítat
+                        </div>
+                    </button>
+                </div>
+
+                <div>
+                    <ul
+                        class="flex flex-col gap-5"
+                        id="result"
+                    >
+                        
+                    </ul>
+                    <div class="mt-4 flex gap-4 md:justify-end justify-center">
+                        <a
+                            class="hidden btn"
+                            id="permalink"
+                            href=""
+                        ><div class="btn__body">Permalink</div></a>
+                        <a
+                            class="hidden btn"
+                            id="download-log"
+                            download="kroky.md"
+                            href=""
+                        ><div class="btn__body">Stáhnout log</div></a>
+                    </div>
+                </div>
+            </div>
+        </div>
+    </main>
+
+    {{ keyed_rv_members|json_script:"rv-members" }}
+    
+    <script>
+        const VOTE_CALCULATION_ENDPOINT = "{% url "rv_voting_calc:get_calculated_votes" %}"
+
+        {% if options_by_member %}
+            {% for member, selected_options in options_by_member.items %}
+                {% for selected_option in selected_options %}
+                    $(`#${$.escapeSelector("{{ member}}")}-selection`).append(
+                        new Option(
+                            "{{ selected_option }}",
+                            "{{ selected_option }}",
+                            true,
+                            true,
+                        )
+                    );
+                {% endfor %}
+                $(`#${$.escapeSelector("{{ member}}")}-selection`).trigger("change");
+            {% endfor %}
+        {% endif %}
+    </script>
+{% endblock %}

rv_voting_calc/templates/rv_voting_calc/md_steps/found_popularity_winner.md

+**Možnost {{ option_key }} vyhrává s {{ option.vote_count }} hlasy.**

rv_voting_calc/templates/rv_voting_calc/md_steps/initial_sort.md

+# Počáteční rozdělení
+
+**{{ total_ticket_count }}** lístků, hranice pro nadpoloviční podporu **{{ has_support_treshold }}**.
+
+{% include "rv_voting_calc/includes/option_list.md" with options=options options_by_member=options_by_member show_proposers=True show_has_support=True %}

rv_voting_calc/templates/rv_voting_calc/md_steps/no_winner.md

+**Ani jedna možnost nevyhrává.**

rv_voting_calc/templates/rv_voting_calc/md_steps/removed_option.md

+{% load index %}
+
+# {{ iteration|add:1 }}. vyřazovací kolo
+
+**Možnost {{ option_key }} bude {% if randomly %}losováním{% else %}kvůli nepopularitě{% endif %} odstraněna.**
+
+{% include "rv_voting_calc/includes/option_list.md" with options=options options_by_member=options_by_member show_proposers=True show_marked_for_deletion=True %}

rv_voting_calc/templates/rv_voting_calc/md_steps/with_support.md

+# Po vyřazení možností bez nadpoloviční podpory
+
+{% if options_with_support_count != 0 %}
+    {% include "rv_voting_calc/includes/option_list.md" with options=options options_by_member=options_by_member %}
+{% else %}
+    *Žádné možnosti nemají nadpoloviční podporu.*
+{% endif %}

rv_voting_calc/templatetags/index.py

+from django import template
+register = template.Library()
+
+# https://stackoverflow.com/a/29664945
+# Thanks to WeizhongTu and Bakuutin!
+
+
+@register.filter
+def index(indexable, i):
+    return indexable[i]

rv_voting_calc/tests.py

+from django.test import TestCase
+
+# Create your tests here.

rv_voting_calc/urls.py

+from django.urls import path
+
+from . import views
+
+app_name = "rv_voting_calc"
+urlpatterns = [
+    path("", views.index, name="index"),
+    path(
+        "calculated-votes",
+        views.get_calculated_votes,
+        name="get_calculated_votes"
+    )
+]

rv_voting_calc/views.py

+import base64
+import binascii
+import json
+import math
+import random
+import secrets
+import urllib.parse
+
+import gql
+import requests
+
+from gql.transport.exceptions import TransportQueryError
+from gql.transport.requests import RequestsHTTPTransport
+
+from django.conf import settings
+from django.http import HttpResponse, JsonResponse
+from django.shortcuts import render
+from django.template.loader import render_to_string
+from django_http_exceptions import HTTPExceptions
+
+
+def get_options_by_member(source, rv_members) -> dict:
+    try:
+        options_by_member = json.loads(source)
+
+        # The provided votes must be a dictionary with at least 1 key.
+        if not isinstance(options_by_member, dict) or len(options_by_member) == 0:
+            raise ValueError
+    except ValueError:
+        raise HTTPExceptions.BAD_REQUEST
+
+    rv_members = convert_rv_members_to_dict(rv_members)
+
+    for member, options in options_by_member.items():
+        # `member` is not a string
+        if not isinstance(member, str):
+            raise HTTPExceptions.BAD_REQUEST
+
+        # `member` is not in the list of known members
+        if member not in options_by_member:
+            raise HTTPExceptions.BAD_REQUEST
+
+        # `options` is not a list of 1+ length
+        if not isinstance(options, list) and len(options) != 0:
+            raise HTTPExceptions.BAD_REQUEST
+
+        # all items in `options` are strings
+        for item in options:
+            if not isinstance(item, str):
+                raise HTTPExceptions.BAD_REQUEST
+
+    return options_by_member
+
+
+def index(request):
+    rv_members = get_rv_members(request)
+    keyed_rv_members = convert_rv_members_to_dict(rv_members)
+
+    # Get votes from a possible permalink
+    options_by_member = request.GET.get("votes")
+    if options_by_member is not None:
+        options_by_member = urllib.parse.unquote(options_by_member)
+
+    # BEGIN Input validation
+    if options_by_member is not None:
+        options_by_member = get_options_by_member(
+            options_by_member,
+            rv_members=rv_members,
+        )
+
+    return render(
+        request,
+        "rv_voting_calc/index.html",
+        {
+            "rv_members": rv_members,
+            "keyed_rv_members": keyed_rv_members,
+            "options_by_member": options_by_member,
+        }
+    )
+
+
+def get_rv_members(request, get_rv_gid: bool = False):
+    transport = RequestsHTTPTransport(url=settings.CHOBOTNICE_API_URL)
+    client = gql.Client(
+        transport=transport,
+        fetch_schema_from_transport=True,
+    )
+
+    rv_gid = None
+
+    if "rv_gid" in request.GET:
+        rv_gid = urllib.parse.unquote(request.GET["rv_gid"])
+
+        try:
+            base64.b64decode(rv_gid, validate=True)
+        except binascii.Error:
+            raise HTTPExceptions.BAD_REQUEST
+    else:
+        rv_gid = settings.CHOBOTNICE_RV_GID
+
+    # Get members from query
+    query = gql.gql(
+        f"""
+            {{
+                group(id: "{rv_gid}") {{
+                    memberships {{
+                        person {{
+                            username
+                            displayName
+                            officialLastName
+                        }}
+                    }}
+                }}
+            }}
+        """
+    )
+
+    try:
+        result = client.execute(query)
+    except TransportQueryError:
+        # rv_gid was not found
+        raise HTTPExceptions.BAD_REQUEST
+
+    rv_members = []
+
+    # Convert to a nicer format
+    for member in result["group"]["memberships"]:
+        rv_members.append(member["person"])
+
+    # Sort alphabetically
+    rv_members.sort(key=lambda value: value["displayName"])
+
+    if get_rv_gid:
+        return rv_members, rv_gid
+    else:
+        return rv_members
+
+
+def convert_rv_members_to_dict(source: list) -> dict:
+    rv_members = {}
+
+    for member in source:
+        # Convert to username: {data}
+        rv_members[member["username"]] = {
+            "displayName": member["displayName"],
+            "officialLastName": member["officialLastName"]
+        }
+
+    return rv_members
+
+
+def do_step_b_through_d(
+    request,
+    iteration: int,
+    html_steps: list,
+    md_steps: list,
+    options: dict,
+    options_without_support: list,
+    options_by_member: dict,
+    rv_members: dict,
+) -> tuple:
+    ## BEGIN Step B
+
+    options_marked_for_deletion = []
+
+    # Move ticket votes to the next most popular option, if necessary
+    for option_key, option in options.items():
+        votes_to_remove = []
+
+        if option["marked_for_deletion"]:
+            options_marked_for_deletion.append(option_key)
+
+        # If the option has support and isn't marked for deletion, we don't need
+        # to do anything.
+        if option["has_support"] and not option["marked_for_deletion"]:
+            continue
+
+        # For all of the option's votes...
+        for vote_list_position, vote in enumerate(option["ticket_votes"]):
+            # Find the other acceptable options listed within...
+            for other_acceptable_option in vote["other_acceptable"]:
+                # ... if the other acceptable option no longer exists, do nothing.
+                if other_acceptable_option not in options:
+                    continue
+
+                # ... if the other acceptable option has support and isn't marked
+                # for deletion, move this ticket vote there. We don't need to check
+                # positions, since the list we are looping through is ordered
+                # by popularity.
+                if (
+                    options[other_acceptable_option]["has_support"]
+                    and not options[other_acceptable_option]["marked_for_deletion"]
+                ):
+                    votes_to_remove.append(vote_list_position)
+                    options[other_acceptable_option]["ticket_votes"].append(vote)
+                    options[other_acceptable_option]["ticket_count"] += 1
+                    break
+
+        # Remove votes that have been moved from this option.
+        index_offset = 0
+
+        for vote_list_position in votes_to_remove:
+            option["ticket_votes"].pop(vote_list_position - index_offset)
+
+            index_offset += 1
+
+    # If we are on the first iteration, show the list of options with those that
+    # don't have support removed.
+    if iteration == 0:
+        # Get the number of options that have support, for displaying.
+        options_with_support_count = 0
+
+        for option in options.values():
+            if option["has_support"]:
+                options_with_support_count += 1
+
+        context = {
+            "options": options,
+            "options_by_member": options_by_member,
+            "options_with_support_count": options_with_support_count,
+            "rv_members": rv_members
+        }
+
+        html_steps.append(
+            render_to_string(
+                "rv_voting_calc/html_steps/with_support.html",
+                context,
+                request=request,
+            )
+        )
+        md_steps.append(
+            render_to_string(
+                "rv_voting_calc/md_steps/with_support.md",
+                context,
+                request=request,
+            )
+        )
+
+    # Delete options without support and those marked for deletion.
+    for option_key in (options_without_support + options_marked_for_deletion):
+        options.pop(option_key, None)
+
+    # If no options remain, show that there are no winners and end everything.
+    if len(options) == 0:
+        html_steps.append(
+            render_to_string(
+                "rv_voting_calc/html_steps/no_winner.html",
+                {},
+                request=request,
+            )
+        )
+        md_steps.append(
+            render_to_string(
+                "rv_voting_calc/md_steps/no_winner.md",
+                {},
+                request=request,
+            )
+        )
+
+        return options, True
+
+    ## END Step B
+
+    ## BEGIN Step C
+
+    # Sort options by their vote count.
+    options = {
+        key: value
+        for key, value
+        in sorted(
+            options.items(),
+            reverse=True,
+            key=lambda option: option[1]["vote_count"],
+        )
+    }
+
+    # Find winners.
+    winner_vote_count = options[next(iter(options))]["vote_count"]
+    ticket_count_same = True
+    winner_count = 0
+    winning_option_keys = []
+
+    for option_key, option in options.items():
+        if option["vote_count"] == winner_vote_count:
+            if option["ticket_count"] != options[next(iter(options))]["ticket_count"]:
+                ticket_count_same = False
+
+            winning_option_keys.append(option_key)
+            winner_count += 1
+
+    # If there is exactly 1 winner, show the winner and end everything.
+    if winner_count == 1:
+        context = {
+            "option_key": winning_option_keys[0],
+            "option": options[winning_option_keys[0]],
+        }
+
+        html_steps.append(
+            render_to_string(
+                "rv_voting_calc/html_steps/found_popularity_winner.html",
+                context,
+                request=request,
+            )
+        )
+        md_steps.append(
+            render_to_string(
+                "rv_voting_calc/md_steps/found_popularity_winner.md",
+                context,
+                request=request,
+            )
+        )
+
+        return options, True
+    # If all options are winners and have the same ticket vote count,
+    # randomly eliminate one and continue to the next iteration.
+    elif winner_count == len(options) and ticket_count_same:
+        eliminated_winner = random.choice(winning_option_keys)
+        
+        options[eliminated_winner]["marked_for_deletion"] = True
+
+        context = {
+            "iteration": iteration,
+            "option_key": eliminated_winner,
+            "option": options[eliminated_winner],
+            "options": options,
+            "options_by_member": options_by_member,
+            "rv_members": rv_members,
+            "randomly": True
+        }
+
+        html_steps.append(
+            render_to_string(
+                "rv_voting_calc/html_steps/removed_option.html",
+                context,
+                request=request,
+            )
+        )
+        md_steps.append(
+            render_to_string(
+                "rv_voting_calc/md_steps/removed_option.md",
+                context,
+                request=request,
+            )
+        )
+
+        return options, False
+
+    ## END Step C
+
+    ## BEGIN Step D
+
+    # Sort options by their vote count, with lowest ranking ones first.
+    options = {
+        key: value
+        for key, value
+        in sorted(
+            options.items(),
+            key=lambda option: option[1]["vote_count"],
+        )
+    }
+
+    # Find losing options.
+    loser_vote_count = options[next(iter(options))]["vote_count"]
+    loser_count = 0
+    losing_option_keys = []
+
+    for option_key, option in options.items():
+        if option["vote_count"] == loser_vote_count:
+            losing_option_keys.append(option_key)
+            loser_count += 1
+
+    # If there is exactly one losing option, delete it and move on to the next
+    # iteration.
+    if loser_count == 1:
+        loser_key = next(iter(options))
+
+        options[loser_key]["marked_for_deletion"] = True
+
+        context = {
+            "iteration": iteration,
+            "option_key": loser_key,
+            "option": options[loser_key],
+            "options": options,
+            "options_by_member": options_by_member,
+            "rv_members": rv_members,
+        }
+
+        html_steps.append(
+            render_to_string(
+                "rv_voting_calc/html_steps/removed_option.html",
+                context,
+                request=request,
+            )
+        )
+        md_steps.append(
+            render_to_string(
+                "rv_voting_calc/md_steps/removed_option.md",
+                context,
+                request=request,
+            )
+        )
+
+        return options, False
+    else:
+        # If there are multiple losing options, order them by the amount of
+        # ticket votes they have.
+        losing_option_keys.sort(
+            key=lambda key: options[key]["ticket_count"]
+        )
+
+        # Delete the vote with the least ticket votes. There maybe more, but
+        # those should be taken care of in the next iteration.
+        options[losing_option_keys[0]]["marked_for_deletion"] = True
+
+        context = {
+            "iteration": iteration,
+            "option_key": losing_option_keys[0],
+            "option": options[losing_option_keys[0]],
+            "options": options,
+            "options_by_member": options_by_member,
+            "rv_members": rv_members,
+        }
+
+        html_steps.append(
+            render_to_string(
+                "rv_voting_calc/html_steps/removed_option.html",
+                context,
+                request=request,
+            )
+        )
+        md_steps.append(
+            render_to_string(
+                "rv_voting_calc/md_steps/removed_option.md",
+                context,
+                request=request,
+            )
+        )
+
+        # End this iteration and move to the next one.
+        return options, False
+
+    ## END Step D
+
+    # (TODO: Will this function ever actually reach the code below?)
+
+    # If there are no winners, show that and end everything.
+    if len(options) == 0:
+        html_steps.append(
+            render_to_string(
+                "rv_voting_calc/html_steps/no_winner.html",
+                {},
+                request=request,
+            )
+        )
+        md_steps.append(
+            render_to_string(
+                "rv_voting_calc/md_steps/no_winner.md",
+                {},
+                request=request,
+            )
+        )
+
+        return options, True
+
+    # Continue on to the next iteration.
+    return options, False
+
+
+def get_calculated_votes(request):
+    options_by_member = request.GET.get("votes")
+    if options_by_member is not None:
+        options_by_member = urllib.parse.unquote(options_by_member)
+
+    # BEGIN Input validation
+
+    if options_by_member is None:
+        raise HTTPExceptions.BAD_REQUEST
+
+    rv_members, rv_gid = get_rv_members(request, get_rv_gid=True)
+    options_by_member = get_options_by_member(
+        options_by_member,
+        rv_members=rv_members,
+    )
+    rv_members = convert_rv_members_to_dict(rv_members)
+
+    # END Input validation
+
+    ## BEGIN Step A
+    # Sorting
+
+    html_steps = []
+    md_steps = []
+
+    options = {}
+    total_ticket_count = len(options_by_member)  # 1 member = 1 ticket
+    has_support_treshold = math.ceil(total_ticket_count * 0.5)
+
+    # If the ticket count is divisible by 2, add 1 to make the treshold >half
+    if total_ticket_count % 2 == 0:
+        has_support_treshold += 1
+
+    # For each member's selected options...
+    for member, selected_options in options_by_member.items():
+        for position, option in enumerate(selected_options):
+            # Add the option to the options list if it isn't there already.
+            if option not in options:
+                options[option] = {
+                    "ticket_count": 0,
+                    "vote_count": 0,
+                    "marked_for_deletion": False,
+                    "has_support": False,
+                    "ticket_votes": [],
+                }
+
+            # If this vote isn't a ticket vote, don't do anything else.
+            if position != 0:
+                continue
+
+            # Add this vote to the option's ticket votes.
+            options[option]["ticket_votes"].append({
+                "member": member,
+                "other_acceptable": selected_options[1:]
+            })
+            # Increase the vote and ticket vote counters.
+            options[option]["ticket_count"] += 1
+            options[option]["vote_count"] += 1
+
+            # For all other acceptable options the member selected...
+            for other_acceptable_option in selected_options[1:]:
+                # If the option isn't among in the options list, add it.
+                if other_acceptable_option not in options:
+                    options[other_acceptable_option] = {
+                        "ticket_count": 0,
+                        "vote_count": 0,
+                        "marked_for_deletion": False,
+                        "has_support": False,
+                        "ticket_votes": [],
+                    }
+
+                # Increase the option's vote counter.
+                options[other_acceptable_option]["vote_count"] += 1
+
+    # Mark options that don't meet the >half acceptability treshold as such.
+    options_without_support = []
+
+    for option_key, option in options.items():
+        if option["vote_count"] >= has_support_treshold:
+            option["has_support"] = True
+
+        if not option["has_support"]:
+            options_without_support.append(option_key)
+            continue
+
+    # Order the options based on whether they have support or not.
+    # This is purely for aesthetic purpose.
+    options = {
+        key: value
+        for key, value
+        in sorted(
+            options.items(),
+            reverse=True,
+            key=lambda option: option[1]["has_support"],
+        )
+    }
+
+    context = {
+        "options": options,
+        "options_by_member": options_by_member,
+        "rv_members": rv_members,
+        "total_ticket_count": total_ticket_count,
+        "has_support_treshold": has_support_treshold
+    }
+
+    html_steps.append(
+        render_to_string(
+            "rv_voting_calc/html_steps/initial_sort.html",
+            context,
+            request=request,
+        )
+    )
+    md_steps.append(
+        render_to_string(
+            "rv_voting_calc/md_steps/initial_sort.md",
+            context,
+            request=request,
+        )
+    )
+
+    ## END Step A
+
+    # Make sure we can always repeat a previously made calculation. This is also
+    # useful for permalinks.
+
+    # First, try to find the seed in the URL parameters
+    seed = request.GET.get(
+        "seed",
+        # Then, try to find it in the cookies
+        request.COOKIES.get(
+            "seed",
+            # If neither are set, generate a default.
+            base64.b64encode(secrets.token_bytes()).decode("utf-8")
+        )
+    )
+
+    # Unquote the seed if it was found in the URL parameters
+    if "seed" in request.GET:
+        seed = urllib.parse.unquote(seed)
+
+    random.seed(seed)
+
+    print(seed)
+
+    # Continue until steps B - D have reached a final conclusion and count
+    # the amount of times the function ran to achieve this.
+    iteration = 0
+
+    while True:
+        options, ended = do_step_b_through_d(
+            request,
+            iteration,
+            html_steps,
+            md_steps,
+            options,
+            options_without_support,
+            options_by_member,
+            rv_members,
+        )
+
+        if ended:
+            response = render(
+                request,
+                "rv_voting_calc/combined_steps.html",
+                {
+                    "html_steps": "\n".join(html_steps),
+                    "md_steps": md_steps
+                }
+            )
+
+            # Set the random seed cookie to the one used in the calculation.
+            response.set_cookie("seed", seed)
+            # Do the same for RV's GID.
+            response.set_cookie("rv_gid", rv_gid)
+
+            return response
+
+        # Step E
+        iteration += 1    

rybicka/settings/base.py

@@ -47,6 +47,7 @@ INSTALLED_APPS = [
 
     "shared",
     "member_group_size_calc",
+    "rv_voting_calc",
 ]
 
 MIDDLEWARE = [
@@ -56,6 +57,9 @@ MIDDLEWARE = [
     "django.middleware.csrf.CsrfViewMiddleware",
     "django.contrib.messages.middleware.MessageMiddleware",
     "django.middleware.clickjacking.XFrameOptionsMiddleware",
+
+    "django_http_exceptions.middleware.ExceptionHandlerMiddleware",
+    "django_http_exceptions.middleware.ThreadLocalRequestMiddleware",
 ]
 
 ROOT_URLCONF = "rybicka.urls"
@@ -112,3 +116,11 @@ WEBPACK_LOADER = {
         "IGNORE": [r".+\.hot-update.js", r".+\.map"],
     }
 }
+
+# Chobotnice
+
+CHOBOTNICE_API_URL=env.str(
+    "CHOBOTNICE_API_URL",
+    "https://chobotnice.pirati.cz/graphql/"
+)
+CHOBOTNICE_RV_GID=env.str("CHOBOTNICE_RV_GID")

rybicka/urls.py

@@ -16,6 +16,7 @@ Including another URLconf
 from django.urls import include, path
 
 urlpatterns = [
-    path("vypocet-skupiny-clenu", include("member_group_size_calc.urls")),
+    path("vypocet-skupiny-clenu/", include("member_group_size_calc.urls")),
+    path("hlasovani-rv/", include("rv_voting_calc.urls")),
     path("", include("shared.urls")),
 ]

shared/templates/shared/base.html

@@ -39,6 +39,7 @@
         <link rel="shortcut icon" type="image/png" href="https://www.pirati.cz/static/shared/favicon/favicon-32.png" sizes="32x32">
         <link rel="shortcut icon" type="image/png" href="https://www.pirati.cz/static/shared/favicon/favicon-16.png" sizes="16x16">
 
+        {% render_bundle "shared" %}
         {% render_bundle "base" %}
 
         {% block head %}{% endblock %}

shared/templates/shared/index.html

@@ -16,7 +16,7 @@
         <h1 class="text-6xl font-bebas mb-5">Rychlé nástroje</h1>
         <ul class="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-8">
            <li class="card">
-                <a href="{% url "member_group_size_calc_index" %}">
+                <a href="{% url "member_group_size_calc:index" %}">
                     <img
                         src="{% static "shared/calculator.webp" %}"
                         alt="Kalkulačka velikosti skupiny členů"
@@ -25,7 +25,7 @@
                 </a>
                 <div class="p-4">
                     <h2 class="mb-2 text-xl font-bold">
-                        <a href="{% url "member_group_size_calc_index" %}">
+                        <a href="{% url "member_group_size_calc:index" %}">
                             Kalkulačka velikosti skupiny členů
                         </a>
                     </h2>
@@ -34,6 +34,25 @@
                     </div>
                 </div>
             </li>
+            <li class="card">
+                <a href="{% url "rv_voting_calc:index" %}">
+                    <img
+                        src="{% static "shared/voting.webp" %}"
+                        alt="Kalkulačka velikosti skupiny členů"
+                        class="w-full h-48 object-cover"
+                    >
+                </a>
+                <div class="p-4">
+                    <h2 class="mb-2 text-xl font-bold">
+                        <a href="{% url "rv_voting_calc:index" %}">
+                            Kalkulačka hlasování RV
+                        </a>
+                    </h2>
+                    <div class="font-light text-sm break-words">
+                        Výpočet výsledku referenda RV, systémem alternativního hlasování.
+                    </div>
+                </div>
+            </li>
             <li class="card">
                 <a href="https://z.pirati.cz" target="_blank">
                     <img

static_src/member_group_size_calc.js

 import $ from "jquery";
 
-import "@fortawesome/fontawesome-free/js/fontawesome";
-import "@fortawesome/fontawesome-free/js/solid";
-import "@fortawesome/fontawesome-free/js/regular";
-
 $(window).ready(
     () => {
         $("#member-count").on(

static_src/rv_voting_calc.js

+import jQuery from "jquery";
+
+Object.assign(window, { $: jQuery, jQuery });
+
+import Cookies from "js-cookie";
+
+require("select2/dist/js/i18n/cs");
+import "select2/dist/js/select2.full";
+import "select2/dist/css/select2.min.css";
+
+$(window).ready(
+    () => {
+        const RV_MEMBERS = JSON.parse($("#rv-members")[0].textContent);
+
+        $(".__vote-selection").select2({
+            tags: true,
+            tokenSeparators: [",", " "],
+            // https://stackoverflow.com/a/28657702 - Thanks to Artur Filipiak!
+            createTag: tag => {
+                return {
+                    id: tag.term,
+                    text: tag.term,
+                    isNew : true
+                };
+            }
+        });
+
+        $(".__vote-selection").on(
+            "select2:selecting",
+            event => {
+                // Prevent empty tags.
+                if (event.params.args.data.id == "") {
+                    event.preventDefault();
+                }
+            }
+        );
+
+        $(".__vote-selection").on(
+            "select2:select",
+            event => {
+                $("#count-votes").prop("disabled", false);
+
+                // Keep user-defined ordering. This is imperative!
+                // http://github.com/select2/select2/issues/3106 - Thanks to kevin-brown!
+                const element = $(event.params.data.element);
+                
+                element.detach();
+                $(this).append(element);
+                $(this).trigger("change");
+            }
+        );
+
+        $(".__vote-selection").on(
+            "select2:unselect",
+            event => {
+                for (const selection of $(".__vote-selection")) {
+                    if ($(selection).select2("data").length !== 0) {
+                        return;
+                    }
+                }
+
+                $("#count-votes").prop("disabled", true);
+            }
+        );
+
+        $("#count-votes").on(
+            "click",
+            async (event) => {
+                $(event.currentTarget).addClass("btn--loading").prop("disabled", true);
+
+                let votes = {};
+
+                for (const username of Object.keys(RV_MEMBERS)) {
+                    const selectedOptions = $(`#${$.escapeSelector(username)}-selection`).select2("data");
+
+                    if (selectedOptions.length === 0) {
+                        continue;
+                    }
+
+                    votes[username] = [];
+
+                    for (const option of selectedOptions) {
+                        votes[username].push(option.id);
+                    }
+                }
+
+                const urlParams = new URL(window.location).searchParams;
+                const rvGid = urlParams.get("rv_gid");
+                const seed = urlParams.get("seed");
+
+                let response = await fetch(
+                    VOTE_CALCULATION_ENDPOINT
+                    + `?votes=${encodeURIComponent(JSON.stringify(votes))}`
+                    + (
+                        (rvGid !== null) ?
+                        `&rv_gid=${encodeURIComponent(rvGid)}` : ""
+                    )
+                    + (
+                        (seed !== null) ?
+                        `&seed=${encodeURIComponent(seed)}` : ""
+                    )
+                );
+
+                if (!response.ok) {
+                    alert("Chyba při získávání výsledků hlasování.");
+                    return;
+                }
+
+                $("#result").html(await response.text());
+
+                $("#permalink,#download-log").show();
+                $("#permalink").attr(
+                    "href",
+                    (
+                        // Base URL
+                        window.location.href.split('?')[0]
+                        + `?votes=${encodeURIComponent(JSON.stringify(votes))}`
+                        + `&rv_gid=${encodeURIComponent(Cookies.get("rv_gid"))}`
+                        + `&seed=${encodeURIComponent(Cookies.get("seed"))}`
+                    )
+                );
+                $("#download-log").attr(
+                    "href",
+                    (
+                        "data:text/plain;charset=utf-8,"
+                        + encodeURIComponent($("#md-steps").html())
+                    )
+                );
+
+                $("#result")[0].scrollIntoView();
+                $(event.currentTarget).removeClass("btn--loading").prop("disabled", false);
+            }
+        );
+    }
+)

static_src/shared/utils.js

+const escapeHTML = (source) => {
+    return new Option(source).innerHTML;
+}
+
+export { escapeHTML };