feat: implement search

.editorconfig

@@ -1,5 +1,5 @@
 root = true
 
-[*.html]
+[*.{html,js}]
 indent_size = 4
 indent_style = space

lelcsc/core/context_processors.py

@@ -1,3 +1,4 @@
+from .forms import SearchForm
 from .signals import populate_nav
 
 
@@ -10,3 +11,7 @@ def nav(request):
     ]
 
     return {"nav_items": nav_items}
+
+
+def search(request):
+    return {"search_form": SearchForm()}

lelcsc/core/forms.py

@@ -15,3 +15,21 @@ class AddStockForm(forms.Form):
 
 
 AddStockFormSet = forms.formset_factory(AddStockForm, extra=0)
+
+
+class SearchForm(forms.Form):
+    PER_PAGE_CHOICES = [
+        (10, "10"),
+        (25, "25"),
+        (50, "50"),
+        (100, "100"),
+    ]
+
+    q = forms.CharField(label=_("Search"), required=False)
+    per_page = forms.TypedChoiceField(
+        choices=PER_PAGE_CHOICES,
+        coerce=int,
+        empty_value=25,
+        label=_("Results per page"),
+        widget=forms.Select(attrs={"form": "searchForm"}),
+    )

lelcsc/core/static/core/search_results.js

@@ -0,0 +1,3 @@
+document.getElementById('id_per_page').addEventListener('change', event => {
+    event.target.form.requestSubmit();
+});

lelcsc/core/templates/core/search_results.html

@@ -0,0 +1,55 @@
+{% extends "base.html" %}
+
+{% load django_bootstrap5 %}
+{% load i18n %}
+{% load properties %}
+{% load static %}
+
+{% block page_title %}{% translate "Search results for" %} "{{ query }}"{% endblock %}
+
+{% block content %}
+<h1>{% translate "Search results for" %} "{{ query }}"</h1>
+<table class="table">
+    <thead>
+        <tr>
+            <th>
+                {% translate "Part number" %}
+                <div class="d-sm-none fst-italic">{% translate "Total stock" %}</div>
+            </th>
+            <th class="d-none d-sm-table-cell">{% translate "Total stock" %}</th>
+{% for property in properties %}
+            <th>{{ property.name }}</th>
+{% endfor %}
+        </tr>
+    </thead>
+    <tbody>
+{% for component, properties in results %}
+        <tr>
+            <td>
+                {{ component.part_number }}
+                <dl class="d-sm-none mb-0">
+                    <dt class="visually-hidden">Total stock</dt>
+                    <dd class="mb-0 fst-italic">{{ component.total_stock }}</dd>
+                </dl>
+            </td>
+            <td class="d-none d-sm-table-cell">{{ component.total_stock }}</td>
+{% for _, value in properties %}
+{% if value %}
+            <td>{{ value|format_value }}</td>
+{% else %}
+            <td class="fst-italic">{% translate "n/a" %}</td>
+{% endif %}
+{% endfor %}
+        </tr>
+{% endfor %}
+    </tbody>
+</table>
+<div class="d-flex flex-wrap column-gap-3 justify-content-between">
+    {% bootstrap_pagination page %}
+    {% bootstrap_field search_form.per_page show_label=False %}
+</div>
+{% endblock %}
+
+{% block extra_js %}
+<script src="{% static 'core/search_results.js' %}"></script>
+{% endblock %}

lelcsc/core/templates/partials/navbar.html

@@ -7,7 +7,7 @@
             <span class="navbar-toggler-icon"></span>
         </button>
         <div class="navbar-collapse collapse show" id="navbarContent">
-            <ul class="navbar-nav me-auto">
+            <ul class="navbar-nav">
 {% for item in nav_items %}
                 <li class="nav-item">
                     <a class="nav-link{% if item.is_active %} active{% endif %}" href="{{ item.link }}"{% if item.is_active %} aria-current="page"{% endif %}>
@@ -16,6 +16,9 @@
                 </li>
 {% endfor %}
             </ul>
+            <form action="{% url 'search' %}" class="d-flex mx-auto" id="searchForm" method="get" role="search">
+                {% bootstrap_field search_form.q show_label="skip" wrapper_class="mb-1 mb-md-0 w-100" %}
+            </form>
 {% if request.user.is_authenticated %}
             <form action="{% url 'oidc_logout' %}" class="d-flex justify-content-end" method="post">
                 {% csrf_token %}

lelcsc/core/templatetags/properties.py

@@ -0,0 +1,49 @@
+from django import template
+
+from ..models import Property, Value
+
+SI_PREFIXES = {
+    -12: "p",
+    -9: "n",
+    -6: "µ",
+    -3: "m",
+    3: "k",
+    6: "M",
+    9: "G",
+}
+
+register = template.Library()
+
+
+@register.filter
+def format_value(value):
+    if not isinstance(value, Value):
+        return value
+
+    property = value.property
+    match property.type:
+        case Property.Type.QUANTITY:
+            s = str(value.integer)
+
+            scale = property.scale
+            if scale > 0:
+                s += "0" * scale
+            elif scale < 0:
+                s = str(value.integer).rjust(abs(scale) + 1, "0")
+                s = s[:scale] + "." + s[scale:]
+                s = s.rstrip("0").removesuffix(".")
+
+            leading_zeroes = len(s.removeprefix("0.")) - len(
+                s.removeprefix("0.").lstrip("0")
+            )
+            if prefix := SI_PREFIXES.get(-leading_zeroes // 3 * 3, ""):
+                s = s.removeprefix("0.").lstrip("0")
+                s = (s[: -leading_zeroes % 3] or "0") + "." + s[-leading_zeroes % 3 :]
+
+            trailing_zeroes = len(s) - len(s.rstrip("0"))
+            if prefix := SI_PREFIXES.get(trailing_zeroes // 3 * 3, ""):
+                s = s.rstrip("0") + "0" * (trailing_zeroes % 3)
+
+            return f"{s} {prefix}{value.property.unit}"
+        case Property.Type.TEXT:
+            return value.text

lelcsc/core/urls.py

@@ -6,5 +6,6 @@ urlpatterns = [
     path("", views.index, name="index"),
     path("add-stock", views.add_stock, name="add_stock"),
     path("unauthorized", views.unauthorized, name="unauthorized"),
+    path("search", views.search, name="search"),
     path("admin/login/", views.admin_login),
 ]

lelcsc/core/views.py

@@ -1,13 +1,15 @@
 from django.contrib import messages
 from django.contrib.auth.decorators import login_required
+from django.core.paginator import Paginator
 from django.db import transaction
+from django.db.models import Q, Sum
 from django.forms.models import model_to_dict
 from django.http import QueryDict
 from django.shortcuts import redirect, render
 from django.urls import reverse
 from django.utils.translation import ngettext
 
-from .forms import AddStockFormSet
+from .forms import AddStockFormSet, SearchForm
 from .models import Component, Property, Stock, User, Value
 
 
@@ -115,6 +117,61 @@ def add_stock(request):
     )
 
 
+@login_required
+def search(request):
+    data = request.GET.copy()
+    data.setdefault("per_page", 25)
+
+    form = SearchForm(data)
+    if not form.is_valid() or form.cleaned_data["q"] == "":
+        return redirect("index")
+
+    query = form.cleaned_data["q"]
+    results = (
+        Component.objects.prefetch_related("properties")
+        .annotate(total_stock=Sum("stock__quantity", distinct=True))
+        .filter(
+            Q(part_number__icontains=query)
+            | Q(value__text__icontains=query, value__property__searchable=True)
+        )
+        .order_by("pk")
+    )
+
+    paginator = Paginator(results, form.cleaned_data["per_page"])
+    page = paginator.get_page(data.get("page"))
+
+    properties = set()
+    values = {}
+    for component in page:
+        properties |= set(component.properties.all())
+        values[component.part_number] = {
+            value.property.name: value for value in component.value_set.all()
+        }
+
+    properties = list(properties)
+
+    return render(
+        request,
+        "core/search_results.html",
+        {
+            "page": page,
+            "properties": properties,
+            "query": query,
+            "results": [
+                (
+                    component,
+                    [
+                        (property, values[component.part_number].get(property.name))
+                        for property in properties
+                    ],
+                )
+                for component in page
+            ],
+            "search_form": SearchForm(initial=data),
+        },
+    )
+
+
 def admin_login(request):
     if request.user.is_authenticated:
         return redirect("unauthorized")

lelcsc/settings.py

@@ -75,6 +75,7 @@ TEMPLATES = [
                 "django.contrib.auth.context_processors.auth",
                 "django.contrib.messages.context_processors.messages",
                 "lelcsc.core.context_processors.nav",
+                "lelcsc.core.context_processors.search",
             ],
         },
     },