fix: map Dolibarr tva_tx to PS id_tax_rules_group on product sync

Price with VAT was showing the same value as price without VAT because
id_tax_rules_group was hardcoded to 1 (no-tax group in this PS instance).

Now reads tva_tx from Dolibarr product, resolves the PS tax rule group
via a configurable map (integration.prestashop.tax-rule-groups), and
sets the correct group in the product XML. Defaults to
default-tax-rules-group-id when no mapping is found.

ES groups configured: 21% → 53, 10% → 54, 4% → 55.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

sync-service/src/main/java/com/teterialosjuanjos/tfg/sync_service/config/IntegrationProperties.java

@@ -3,8 +3,11 @@ package com.teterialosjuanjos.tfg.sync_service.config;
 import jakarta.validation.Valid;
 import jakarta.validation.constraints.NotBlank;
 import org.springframework.boot.context.properties.ConfigurationProperties;
+import org.springframework.boot.context.properties.bind.DefaultValue;
 import org.springframework.validation.annotation.Validated;
 
+import java.util.Map;
+
 /**
  * Externalized configuration for Dolibarr and PrestaShop integration endpoints.
  * Bound from {@code integration.*} properties in application.yml; validated at startup.
@@ -28,16 +31,23 @@ public record IntegrationProperties(
     ) {}
 
     /**
-     * @param baseUrl           full API base URL, e.g. {@code https://host/tienda/api}
-     * @param apiKey            webservice key sent as {@code ws_key} query param
-     * @param defaultCategoryId PrestaShop category ID assigned to new products (default: 2 = Home)
-     * @param languageId        PrestaShop language ID used for all multilingual fields (name, description, etc.)
-     *                          Check yours at GET /api/languages. Default 1 is usually English; set to Spanish ID.
+     * @param baseUrl                full API base URL, e.g. {@code https://host/tienda/api}
+     * @param apiKey                 webservice key sent as {@code ws_key} query param
+     * @param defaultCategoryId      PrestaShop category ID assigned to new products (default: 2 = Home)
+     * @param languageId             PrestaShop language ID used for all multilingual fields (name, description, etc.)
+     *                               Check yours at GET /api/languages. Default 1 is usually English; set to Spanish ID.
+     * @param defaultTaxRulesGroupId Fallback PS {@code id_tax_rules_group} when the product's Dolibarr {@code tva_tx}
+     *                               has no entry in {@code taxRuleGroups}. Defaults to 1.
+     *                               Check your PS tax groups at GET /api/tax_rule_groups.
+     * @param taxRuleGroups          Map of Dolibarr VAT rate (integer key, e.g. "21") to PS {@code id_tax_rules_group}.
+     *                               Configure in application-dev/prod.yml. If empty, {@code defaultTaxRulesGroupId} is used.
      */
     public record Prestashop(
             @NotBlank String baseUrl,
             @NotBlank String apiKey,
             int defaultCategoryId,
-            int languageId
+            int languageId,
+            @DefaultValue("1") int defaultTaxRulesGroupId,
+            Map<String, Integer> taxRuleGroups
     ) {}
 }

sync-service/src/main/java/com/teterialosjuanjos/tfg/sync_service/integration/dolibarr/dto/DolibarrProductDto.java

@@ -26,5 +26,7 @@ public record DolibarrProductDto(
         @JsonProperty("tosell") Integer toSell,
         /** 0 = physical product, 1 = service */
         Integer type,
-        Double weight
+        Double weight,
+        /** VAT rate in percent, e.g. 21.0 for 21% IVA */
+        @JsonProperty("tva_tx") Double tvaTx
 ) {}

sync-service/src/main/java/com/teterialosjuanjos/tfg/sync_service/integration/prestashop/PrestashopClient.java

@@ -371,7 +371,8 @@ public class PrestashopClient {
             sb.append("<id_category_default>").append(escapeXml(dto.idCategoryDefault())).append("</id_category_default>");
         }
         sb.append("<state>1</state>");
-        sb.append("<id_tax_rules_group>1</id_tax_rules_group>");
+        int taxRulesGroupId = dto.taxRulesGroupId() != null ? dto.taxRulesGroupId() : 1;
+        sb.append("<id_tax_rules_group>").append(taxRulesGroupId).append("</id_tax_rules_group>");
         sb.append("<id_shop_default>1</id_shop_default>");
         sb.append("<available_for_order>1</available_for_order>");
         sb.append("<show_price>1</show_price>");

sync-service/src/main/java/com/teterialosjuanjos/tfg/sync_service/integration/prestashop/dto/PrestashopProductDto.java

@@ -34,7 +34,9 @@ public record PrestashopProductDto(
         @JsonProperty("description_short")
         @JsonDeserialize(using = MultilangStringDeserializer.class) String descriptionShort,
         /** PS category IDs to set on write; not present in PS JSON responses (ignored on read). */
-        @JsonIgnore List<String> categoryIds
+        @JsonIgnore List<String> categoryIds,
+        /** PS tax rule group ID; resolved from Dolibarr tva_tx at sync time, write-only. */
+        @JsonIgnore Integer taxRulesGroupId
 ) {
 
     /** Envelope for {@code GET /api/products?display=full} */

sync-service/src/main/java/com/teterialosjuanjos/tfg/sync_service/sync/ProductSyncService.java

@@ -19,6 +19,7 @@ import org.springframework.web.client.RestClientException;
 import java.time.Instant;
 import java.util.ArrayList;
 import java.util.List;
+import java.util.Map;
 import java.util.Optional;
 import java.util.Set;
 import java.util.stream.Collectors;
@@ -249,6 +250,7 @@ public class ProductSyncService {
         String description = src.description() != null ? src.description() : "";
         String descriptionShort = src.notePublic() != null ? src.notePublic() : "";
         String active = (src.toSell() != null && src.toSell() == 0) ? "0" : "1";
+        Integer taxRulesGroupId = resolveTaxRulesGroup(src.tvaTx());
 
         return new PrestashopProductDto(
                 prestashopId,
@@ -259,7 +261,22 @@ public class ProductSyncService {
                 label,
                 description,
                 descriptionShort,
-                allCategoryIds
+                allCategoryIds,
+                taxRulesGroupId
         );
     }
+
+    /**
+     * Resolves the PrestaShop {@code id_tax_rules_group} from the Dolibarr VAT rate.
+     * Looks up {@code tvaTx} (truncated to int, e.g. 21.0 → "21") in the configured map.
+     * Falls back to {@code defaultTaxRulesGroupId} when no mapping exists.
+     */
+    private Integer resolveTaxRulesGroup(Double tvaTx) {
+        Map<String, Integer> map = integrationProperties.prestashop().taxRuleGroups();
+        if (tvaTx != null && map != null && !map.isEmpty()) {
+            Integer groupId = map.get(String.valueOf(tvaTx.intValue()));
+            if (groupId != null) return groupId;
+        }
+        return integrationProperties.prestashop().defaultTaxRulesGroupId();
+    }
 }

sync-service/src/main/resources/application-dev.yml.example

@@ -29,6 +29,11 @@ integration:
     api-key: DOLIBARR_API_KEY_AQUI
   prestashop:
     api-key: PRESTASHOP_API_KEY_AQUI
+    default-tax-rules-group-id: 53  # ES Standard rate (21%) — fallback
+    tax-rule-groups:
+      21: 53   # ES Standard rate (21%)
+      10: 54   # ES Reduced Rate (10%)
+      4: 55    # ES Super Reduced Rate (4%)
 
 logging:
   level:

sync-service/src/main/resources/application.yml

@@ -17,6 +17,11 @@ integration:
     api-key: ${PRESTASHOP_API_KEY}
     default-category-id: 2
     language-id: ${PRESTASHOP_LANGUAGE_ID:1}  # set to your Spanish language ID (check GET /api/languages)
+    default-tax-rules-group-id: 53            # ES Standard rate (21%) — fallback
+    tax-rule-groups:
+      21: 53   # ES Standard rate (21%)
+      10: 54   # ES Reduced Rate (10%)
+      4: 55    # ES Super Reduced Rate (4%)
 
 api:
   security: