From a4e92ed9bec1f5879eb1c20dfe281c4d25ed5f89 Mon Sep 17 00:00:00 2001
From: Igor Tolmachev <me@igorek.dev>
Date: Sun, 23 Jun 2024 15:19:40 +0900
Subject: Improve ZipFile

---
 src/zip/file.rs | 69 +++++++++++++++++++++++++++++++++++++--------------------
 1 file changed, 45 insertions(+), 24 deletions(-)

(limited to 'src/zip/file.rs')

diff --git a/src/zip/file.rs b/src/zip/file.rs
index d5b3327..f735d65 100644
--- a/src/zip/file.rs
+++ b/src/zip/file.rs
@@ -1,45 +1,66 @@
 use crate::driver::ArchiveFile;
-use chrono::{NaiveDate, NaiveDateTime, NaiveTime};
+use crate::zip::{ZipError, ZipResult};
+use chrono::{DateTime, Local};
+
+pub enum CompressionMethod {
+    Store,
+    Deflate,
+    BZIP2,
+    LZMA,
+    ZStd,
+    XZ,
+}
+
+impl CompressionMethod {
+    pub(crate) fn from_struct_id(id: u16) -> ZipResult<Self> {
+        match id {
+            0 => Ok(Self::Store),
+            8 => Ok(Self::Deflate),
+            12 => Ok(Self::BZIP2),
+            14 => Ok(Self::LZMA),
+            93 => Ok(Self::ZStd),
+            95 => Ok(Self::XZ),
+            1..=7 | 9..=11 | 13 | 15..=20 | 94 | 96..=99 => {
+                Err(ZipError::UnsupportedCompressionMethod.into())
+            }
+            21..=92 | 100.. => Err(ZipError::InvalidCompressionMethod.into()),
+        }
+    }
+}
 
 pub struct ZipFile {
-    pub name: String,
-    pub datetime: NaiveDateTime,
-    pub compression_method: u16,
+    pub compression_method: CompressionMethod,
+    pub datetime: DateTime<Local>,
+    pub crc: u32,
     pub compressed_size: u64,
     pub size: u64,
+    pub header_pointer: u64,
+    pub name: String,
     pub comment: String,
 }
 
-impl ArchiveFile for ZipFile {}
-
 impl ZipFile {
-    pub(crate) fn new(
-        name: String,
-        dos_date: u16,
-        dos_time: u16,
-        compression_method: u16,
+    pub fn new(
+        compression_method: CompressionMethod,
+        datetime: DateTime<Local>,
+        crc: u32,
         compressed_size: u64,
         size: u64,
+        header_pointer: u64,
+        name: String,
         comment: String,
     ) -> Self {
-        let year = (dos_date >> 9 & 0x7F) + 1980;
-        let month = dos_date >> 5 & 0xF;
-        let day = dos_date & 0x1F;
-
-        let hour = (dos_time >> 11) & 0x1F;
-        let minute = (dos_time >> 5) & 0x3F;
-        let seconds = (dos_time & 0x1F) * 2;
-
         Self {
-            name,
-            datetime: NaiveDateTime::new(
-                NaiveDate::from_ymd_opt(year as i32, month as u32, day as u32).unwrap(),
-                NaiveTime::from_hms_opt(hour as u32, minute as u32, seconds as u32).unwrap(),
-            ),
             compression_method,
+            datetime,
+            crc,
             compressed_size,
             size,
+            header_pointer,
+            name,
             comment,
         }
     }
 }
+
+impl ArchiveFile for ZipFile {}
-- 
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