feat: Add public endpoint and service to retrieve and merge filterable profile fields with options.

src/profile-fields/profile-fields.service.ts

@@ -1,5 +1,5 @@
 import { Injectable, NotFoundException, ConflictException, BadRequestException } from '@nestjs/common';
-import { Prisma } from '@prisma/client';
+import { Prisma, FieldType } from '@prisma/client';
 import { PrismaService } from '../prisma';
 import { CreateFieldDto, UpdateFieldDto } from './dto';
 
@@ -230,4 +230,70 @@ export class ProfileFieldsService {
 
     return { success: true, updated: updates.length };
   }
+
+  /**
+   * Get all filterable fields (public endpoint for search filters)
+   * Returns fields with CHECKBOX_GROUP, SELECT, MULTI_SELECT types that have options
+   */
+  async getFilterableFields() {
+    const filterableTypes: FieldType[] = [FieldType.CHECKBOX_GROUP, FieldType.SELECT, FieldType.MULTI_SELECT];
+
+    const fields = await this.prisma.profileField.findMany({
+      where: {
+        isActive: true,
+        fieldType: { in: filterableTypes },
+        options: { not: Prisma.JsonNull },
+      },
+      select: {
+        id: true,
+        name: true,
+        slug: true,
+        fieldType: true,
+        options: true,
+        section: {
+          select: {
+            id: true,
+            name: true,
+            slug: true,
+          },
+        },
+      },
+      orderBy: [
+        { section: { sortOrder: 'asc' } },
+        { sortOrder: 'asc' },
+      ],
+    });
+
+    // Group fields by slug to merge options from different sections (same field in different agent types)
+    const mergedFields = new Map<string, {
+      slug: string;
+      name: string;
+      fieldType: string;
+      options: { label: string; value: string }[];
+    }>();
+
+    for (const field of fields) {
+      const existingField = mergedFields.get(field.slug);
+      const fieldOptions = (field.options as { label: string; value: string }[]) || [];
+
+      if (existingField) {
+        // Merge options, avoiding duplicates by value
+        const existingValues = new Set(existingField.options.map(o => o.value));
+        for (const opt of fieldOptions) {
+          if (!existingValues.has(opt.value)) {
+            existingField.options.push(opt);
+          }
+        }
+      } else {
+        mergedFields.set(field.slug, {
+          slug: field.slug,
+          name: field.name,
+          fieldType: field.fieldType,
+          options: [...fieldOptions],
+        });
+      }
+    }
+
+    return Array.from(mergedFields.values());
+  }
 }