From b3b89d84bac794dac4bf603497984cfb9a92ae64 Mon Sep 17 00:00:00 2001
From: Benedikt Schneppe <benedikt@flowers-software.de>
Date: Sun, 19 Jan 2025 08:46:13 +0100
Subject: [PATCH] feat: add profile parsing for CII invoices (#5)

---
 src/cii/cii_business_rule_validator.rs |  3 ++-
 src/cii/cii_model.rs                   |  2 +-
 src/lib.rs                             | 29 ++++++++++++++++++++++----
 3 files changed, 28 insertions(+), 6 deletions(-)

diff --git a/src/cii/cii_business_rule_validator.rs b/src/cii/cii_business_rule_validator.rs
index ca1d725..817c7a1 100644
--- a/src/cii/cii_business_rule_validator.rs
+++ b/src/cii/cii_business_rule_validator.rs
@@ -9,7 +9,8 @@ pub fn validate_invoice(
 ) -> Result<(), Vec<ValidationError>> {
     let validation_rules = match zugferd_profile {
         ZugferdProfile::Basic => BASIC_BUSINESS_RULES,
-        ZugferdProfile::EN16931 => EN16931_BUSINESS_RULES,
+        ZugferdProfile::En16931 => EN16931_BUSINESS_RULES,
+        ZugferdProfile::Extended => &*vec![],
     };
 
     let results: Vec<_> = validation_rules
diff --git a/src/cii/cii_model.rs b/src/cii/cii_model.rs
index 55046e0..0520b72 100644
--- a/src/cii/cii_model.rs
+++ b/src/cii/cii_model.rs
@@ -73,7 +73,7 @@ pub struct RamGuidelineSpecifiedDocumentContextParameter {
     #[yaserde(text = true)]
     pub text: Option<String>,
     #[yaserde(rename = "ID", prefix = "ram")]
-    pub ram_id: Option<IdType>,
+    pub id: Option<IdType>,
 }
 
 #[derive(YaSerialize, YaDeserialize, uniffi::Record)]
diff --git a/src/lib.rs b/src/lib.rs
index 92c9d54..42e368b 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -10,7 +10,6 @@ pub mod ubl {
 
 use crate::cii::cii_business_rule_validator;
 use crate::ubl::ubl_business_rule_validator;
-use crate::ZugferdProfile::EN16931;
 pub use cii::cii_model::CrossIndustryInvoice;
 use einvoice_deps_yaserde::__xml::attribute::OwnedAttribute;
 use einvoice_deps_yaserde::__xml::namespace::Namespace;
@@ -119,8 +118,9 @@ pub fn validate_invoice(xml: &str) -> Result<InvoiceStandard, InvoiceError> {
             })?;
         }
         InvoiceStandard::CII(invoice) => {
+            let profile = determine_profile(invoice).map_err(InvoiceError::ValidationError)?;
             let arc = Arc::new(invoice);
-            cii_business_rule_validator::validate_invoice(EN16931, arc).map_err(|e| {
+            cii_business_rule_validator::validate_invoice(profile, arc).map_err(|e| {
                 InvoiceError::ValidationError(
                     e.iter()
                         .map(|e| e.to_string())
@@ -242,10 +242,31 @@ fn get_embedded_xml_file(pdf: &Document) -> Result<Option<(String, Vec<u8>)>, Er
 }
 
 #[derive(uniffi::Enum)]
-// TODO: parse the profile based on the XML content
 pub enum ZugferdProfile {
     Basic,
-    EN16931,
+    En16931,
+    Extended,
+}
+
+fn determine_profile(invoice: &CrossIndustryInvoice) -> Result<ZugferdProfile, String> {
+    if let Some(exchanged_context) = &invoice.rsm_exchanged_document_context {
+        if let Some(guideline_context) =
+            &exchanged_context.ram_guideline_specified_document_context_parameter
+        {
+            if let Some(guideline_id) = &guideline_context.id {
+                if let Some(id) = &guideline_id.id {
+                    return  match id.as_str() {
+                        "urn:cen.eu:en16931:2017" | "urn:cen.eu:en16931:2017#compliant#urn:xeinkauf.de:kosit:xrechnung_3.0" |"urn:cen.eu:en16931:2017#compliant#urn:xeinkauf.de:kosit:xrechnung_3.0#conformant#urn:xeinkauf.de:kosit:extension:xrechnung_3.0"  => Ok(ZugferdProfile::En16931),
+                        "urn:cen.eu:en16931:2017#compliant#urn:factur-x.eu:1p0:basic"
+                        | "urn:ferd:CrossIndustryDocument:invoice:1p0:basic" => Ok(ZugferdProfile::Basic),
+                        "urn:cen.eu:en16931:2017#conformant#urn:factur-x.eu:1p0:extended" => Ok(ZugferdProfile::Extended),
+                        _ => Err(format!("Unknown guideline ID: {}", id)),
+                    };
+                }
+            }
+        }
+    }
+    Err("Document did not contain Profile ID".to_string())
 }
 
 #[cfg(test)]