Add build price summary to project info tab

Displays the total BOM price for N builds on the project info page,
using the existing price-tier logic from PricedetailHelper. The user
can adjust the number of builds via a small form; the unit price is
also shown when N > 1.

New backend:
- ProjectBuildHelper gains calculateTotalBuildPrice(),
  calculateUnitBuildPrice(), roundedTotalBuildPrice(), and
  roundedUnitBuildPrice() — bulk-order quantities are factored in so
  that price tiers apply correctly across N builds.
- ProjectController::info() now reads ?n= and passes number_of_builds
  to the template.

Template (_info.html.twig):
- Adds price badge (hidden when no pricing data is available).
- Adds number-of-builds form that reloads the info page.

src/Controller/ProjectController.php

@@ -69,10 +69,13 @@ class ProjectController extends AbstractController
             return $table->getResponse();
         }
 
+        $number_of_builds = max(1, $request->query->getInt('n', 1));
+
         return $this->render('projects/info/info.html.twig', [
             'buildHelper' => $buildHelper,
             'datatable' => $table,
             'project' => $project,
+            'number_of_builds' => $number_of_builds,
         ]);
     }
 

src/Services/ProjectSystem/ProjectBuildHelper.php

@@ -25,16 +25,22 @@ namespace App\Services\ProjectSystem;
 use App\Entity\Parts\Part;
 use App\Entity\ProjectSystem\Project;
 use App\Entity\ProjectSystem\ProjectBOMEntry;
+use App\Entity\PriceInformations\Currency;
 use App\Helpers\Projects\ProjectBuildRequest;
 use App\Services\Parts\PartLotWithdrawAddHelper;
+use App\Services\Parts\PricedetailHelper;
+use Brick\Math\BigDecimal;
+use Brick\Math\RoundingMode;
 
 /**
  * @see \App\Tests\Services\ProjectSystem\ProjectBuildHelperTest
  */
 final readonly class ProjectBuildHelper
 {
-    public function __construct(private PartLotWithdrawAddHelper $withdraw_add_helper)
-    {
+    public function __construct(
+        private PartLotWithdrawAddHelper $withdraw_add_helper,
+        private PricedetailHelper $pricedetailHelper,
+    ) {
     }
 
     /**
@@ -168,4 +174,71 @@ final readonly class ProjectBuildHelper
             $this->withdraw_add_helper->add($buildRequest->getBuildsPartLot(), $buildRequest->getNumberOfBuilds(), $message);
         }
     }
+
+    /**
+     * Calculates the total price to build the given project N times, taking bulk pricing into account.
+     * Returns null if no BOM entry has any pricing information.
+     */
+    public function calculateTotalBuildPrice(Project $project, int $number_of_builds = 1, ?Currency $currency = null): ?BigDecimal
+    {
+        $total = BigDecimal::zero();
+        $has_price = false;
+
+        foreach ($project->getBomEntries() as $entry) {
+            $unit_price = $this->getBomEntryUnitPrice($entry, $number_of_builds, $currency);
+            if ($unit_price === null) {
+                continue;
+            }
+            $has_price = true;
+            $total = $total->plus($unit_price->multipliedBy($entry->getQuantity())->multipliedBy($number_of_builds));
+        }
+
+        return $has_price ? $total : null;
+    }
+
+    /**
+     * Calculates the price to build one unit of the given project when ordering for N builds in total.
+     * Returns null if no BOM entry has any pricing information.
+     */
+    public function calculateUnitBuildPrice(Project $project, int $number_of_builds = 1, ?Currency $currency = null): ?BigDecimal
+    {
+        $total = $this->calculateTotalBuildPrice($project, $number_of_builds, $currency);
+        if ($total === null) {
+            return null;
+        }
+        return $total->dividedBy($number_of_builds, 10, RoundingMode::HALF_UP);
+    }
+
+    /**
+     * Returns the total build price rounded up to 2 decimal places, ready for display.
+     */
+    public function roundedTotalBuildPrice(Project $project, int $number_of_builds = 1, ?Currency $currency = null): ?BigDecimal
+    {
+        return $this->calculateTotalBuildPrice($project, $number_of_builds, $currency)
+            ?->toScale(2, RoundingMode::UP);
+    }
+
+    /**
+     * Returns the unit build price rounded up to 2 decimal places, ready for display.
+     */
+    public function roundedUnitBuildPrice(Project $project, int $number_of_builds = 1, ?Currency $currency = null): ?BigDecimal
+    {
+        return $this->calculateUnitBuildPrice($project, $number_of_builds, $currency)
+            ?->toScale(2, RoundingMode::UP);
+    }
+
+    /**
+     * Returns the effective unit price for a single piece of the given BOM entry,
+     * taking bulk pricing into account for N builds.
+     */
+    private function getBomEntryUnitPrice(ProjectBOMEntry $entry, int $number_of_builds, ?Currency $currency): ?BigDecimal
+    {
+        if ($entry->getPart() instanceof Part) {
+            $total_qty = $entry->getQuantity() * $number_of_builds;
+            $min_order = $this->pricedetailHelper->getMinOrderAmount($entry->getPart());
+            $effective_qty = ($min_order !== null) ? max($total_qty, $min_order) : $total_qty;
+            return $this->pricedetailHelper->calculateAvgPrice($entry->getPart(), $effective_qty, $currency);
+        }
+        return $entry->getPrice();
+    }
 }

templates/projects/info/_info.html.twig

@@ -55,6 +55,32 @@
                 </span>
             </h6>
         </div>
+        {% set n = number_of_builds ?? 1 %}
+        {% set total_build_price = buildHelper.roundedTotalBuildPrice(project, n, app.user.currency ?? null) %}
+        {% set unit_build_price = buildHelper.roundedUnitBuildPrice(project, n, app.user.currency ?? null) %}
+        {% if total_build_price is not null %}
+            <div class="mt-1">
+                <h6>
+                    <span class="badge badge-primary bg-success">
+                        <i class="fa-solid fa-money-bill-wave fa-fw"></i>
+                        {% trans %}project.info.total_build_price{% endtrans %}:
+                        {{ total_build_price | format_money(app.user.currency ?? null, 2) }}
+                        {% if n > 1 and unit_build_price is not null %}
+                            <span class="ms-1">
+                                ({% trans %}project.info.per_unit_price{% endtrans %}: {{ unit_build_price | format_money(app.user.currency ?? null, 2) }})
+                            </span>
+                        {% endif %}
+                    </span>
+                </h6>
+            </div>
+        {% endif %}
+        <form method="get" action="{{ path('project_info', {'id': project.id}) }}" class="mt-2">
+            <div class="input-group input-group-sm">
+                <span class="input-group-text">{% trans %}project.builds.number_of_builds{% endtrans %}</span>
+                <input type="number" min="1" class="form-control" name="n" required value="{{ n }}">
+                <button class="btn btn-outline-secondary" type="submit">{% trans %}project.build.btn_build{% endtrans %}</button>
+            </div>
+        </form>
         {% if project.children is not empty %}
             <div class="mt-1">
                 <h6>
@@ -69,9 +95,9 @@
     </div>
 
     {% if project.comment is not empty %}
-        <p>
-        <h5>{% trans %}comment.label{% endtrans %}:</h5>
-        {{ project.comment|format_markdown }}
-        </p>
+        <div class="col-12 mt-2">
+            <h5>{% trans %}comment.label{% endtrans %}:</h5>
+            {{ project.comment|format_markdown }}
+        </div>
     {% endif %}
-</div>
+</div>

translations/messages.en.xlf

@@ -7212,6 +7212,18 @@ Element 1 -&gt; Element 1.2</target>
         <target>Subprojects</target>
       </segment>
     </unit>
+    <unit id="prjTtlBP" name="project.info.total_build_price">
+      <segment state="translated">
+        <source>project.info.total_build_price</source>
+        <target>Total build price</target>
+      </segment>
+    </unit>
+    <unit id="prjUntBP" name="project.info.per_unit_price">
+      <segment state="translated">
+        <source>project.info.per_unit_price</source>
+        <target>per unit</target>
+      </segment>
+    </unit>
     <unit id="7nV.Cmd" name="project.info.bom_add_parts">
       <segment state="translated">
         <source>project.info.bom_add_parts</source>