eskd: generate the momsdeklaration file (eSKDUpload 6.0)v0.1.28

report.vat_eskd builds the ISO-8859-1 XML from report.vat: whole
kronor with öre truncated like the blankett, box 48 positive as filed,
MomsBetala computed from the whole-krona boxes, and an optional
upplysning converted from UTF-8, XML-escaped and capped at 300
characters. The TUI momsrapport gains "s = spara eSKD", prompting for a
path and writing the bytes verbatim.

Verified against the FY2027 Kapitas report: 05=703200, 10=175800,
20=1453, 30=851, 48=1030, 49=175621.

1 files changed, 21 insertions, 0 deletions

diff --git a/src/commands.c b/src/commands.c
index 1034b31..e16ba75 100644
--- a/src/commands.c
+++ b/src/commands.c
@@ -3600,6 +3600,25 @@ static yyjson_mut_val *h_report_voucher_list(struct req *r)
     return res;
 }
 
+static yyjson_mut_val *h_report_vat_eskd(struct req *r)
+{
+    const char *from = arg_str(r->args, "from");
+    const char *to = arg_str(r->args, "to");
+    if (!from || !to)
+        return fail(r, "INVALID_ARGS", "from and to are required");
+    char *err = NULL;
+    yyjson_mut_val *res =
+        report_vat_eskd(r->rdoc, r->db, r->org_id, from, to,
+                        arg_str(r->args, "upplysning"), &err);
+    if (!res) {
+        yyjson_mut_val *e = fail(r, "INVALID_ARGS",
+                                 err ? err : "could not build the eSKD file");
+        free(err);
+        return e;
+    }
+    return res;
+}
+
 static unsigned char *read_file(const char *path, size_t *out_len)
 {
     FILE *f = fopen(path, "rb");
@@ -3841,6 +3860,8 @@ const struct command g_commands[] = {
       h_report_general_ledger },
     { "report.voucher_list", "Verifikationslista", PERM_READ, 1, 0, 0,
       h_report_voucher_list },
+    { "report.vat_eskd", "eSKD XML for the momsdeklaration (ISO-8859-1)",
+      PERM_READ, 1, 0, 0, h_report_vat_eskd },
     { "sie.export", "Export SIE 4 (PC8)", PERM_READ, 1, 0, 0, h_sie_export },
     { "sie.import", "Import SIE 4 into an empty fiscal year", PERM_WRITE, 1, 1,
       1, h_sie_import },