UPDATE: Dump of initial files

xlsx/src/export/doc_props.rs

@@ -0,0 +1,69 @@
+use chrono::NaiveDateTime;
+use ironcalc_base::{
+    new_empty::{APPLICATION, APP_VERSION, IRONCALC_USER},
+    types::Workbook,
+};
+
+use crate::error::XlsxError;
+
+// Application-Defined File Properties part
+pub(crate) fn get_app_xml(_: &Workbook) -> String {
+    // contains application name and version
+
+    // The next few are not needed:
+    // security. It is password protected (not implemented)
+    // Scale
+    // Titles of parts
+
+    format!(
+        "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"yes\"?>
+<Properties xmlns=\"http://schemas.openxmlformats.org/officeDocument/2006/extended-properties\" \
+            xmlns:vt=\"http://schemas.openxmlformats.org/officeDocument/2006/docPropsVTypes\">\
+  <Application>{}</Application>\
+  <AppVersion>{}</AppVersion>\
+</Properties>",
+        APPLICATION, APP_VERSION
+    )
+}
+
+// Core File Properties part
+pub(crate) fn get_core_xml(workbook: &Workbook, milliseconds: i64) -> Result<String, XlsxError> {
+    // contains the name of the creator, last modified and date
+    let metadata = &workbook.metadata;
+    let creator = metadata.creator.to_string();
+    let last_modified_by = IRONCALC_USER.to_string();
+    let created = metadata.created.to_string();
+    // FIXME add now
+
+    let seconds = milliseconds / 1000;
+    let dt = match NaiveDateTime::from_timestamp_opt(seconds, 0) {
+        Some(s) => s,
+        None => {
+            return Err(XlsxError::Xml(format!(
+                "Invalid timestamp: {}",
+                milliseconds
+            )))
+        }
+    };
+    let last_modified = dt.format("%Y-%m-%dT%H:%M:%SZ").to_string();
+    Ok(format!(
+        "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"yes\"?>
+<cp:coreProperties \
+ xmlns:cp=\"http://schemas.openxmlformats.org/package/2006/metadata/core-properties\" \
+ xmlns:dc=\"http://purl.org/dc/elements/1.1/\" xmlns:dcterms=\"http://purl.org/dc/terms/\" \
+ xmlns:dcmitype=\"http://purl.org/dc/dcmitype/\" \
+ xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"> \
+<dc:title></dc:title><dc:subject></dc:subject>\
+<dc:creator>{}</dc:creator>\
+<cp:keywords></cp:keywords>\
+<dc:description></dc:description>\
+<cp:lastModifiedBy>{}</cp:lastModifiedBy>\
+<cp:revision></cp:revision>\
+<dcterms:created xsi:type=\"dcterms:W3CDTF\">{}</dcterms:created>\
+<dcterms:modified xsi:type=\"dcterms:W3CDTF\">{}</dcterms:modified>\
+<cp:category></cp:category>\
+<cp:contentStatus></cp:contentStatus>\
+</cp:coreProperties>",
+        creator, last_modified_by, created, last_modified
+    ))
+}