fix(compatibility): some fixes for htop (#53)

* Moved all log to file functions to one module.

* Moved logging to file function to utils module.

* Housekeeping.

* Housekeeping.

* Started investigation into htop CSIs.

* Used better function for scrolling.

* Minor cleanup.

* Cleanup and start of scroll region rotation.

* Implemented scroll region rotation.

* Improved performace.

* New SCI found.

* Typo.

* Typo.

* Removed logging function.

* Added scroll rotation functions.

* Typo.

* Moved all logging function to one module.

* Attempt at making htop work.

* Reverted unneeded changes.

* Improved log file name creation.

* Ran rust fmt.

* PR review edits.

* PR review edits.

* Used mark_for_rerender function.

* Removed _ prefix from logging functions.

3 files changed, 63 insertions, 0 deletions

diff --git a/src/utils/consts.rs b/src/utils/consts.rs
new file mode 100644
index 00000000..5eb96c67
--- /dev/null
+++ b/src/utils/consts.rs
@@ -0,0 +1,3 @@
+pub const MOSAIC_TMP_LOG_FILE: &str = "/tmp/mosaic-log.txt";
+pub const MOSAIC_TMP_LOG_DIR: &str = "/tmp/mosaic-log";
+pub const MOSAIC_TMP_FOLDER: &str = "/tmp/mosaic";
diff --git a/src/utils/logging.rs b/src/utils/logging.rs
new file mode 100644
index 00000000..77e924a9
--- /dev/null
+++ b/src/utils/logging.rs
@@ -0,0 +1,58 @@
+use std::{
+    fs,
+    io::{self, prelude::*},
+    os::unix::io::RawFd,
+    path::PathBuf,
+};
+
+use crate::utils::consts::{MOSAIC_TMP_LOG_DIR, MOSAIC_TMP_LOG_FILE};
+
+pub fn debug_log_to_file(message: String) -> io::Result<()> {
+    let mut file = fs::OpenOptions::new()
+        .append(true)
+        .create(true)
+        .open(MOSAIC_TMP_LOG_FILE)?;
+    file.write_all(message.as_bytes())?;
+    file.write_all("\n".as_bytes())?;
+
+    Ok(())
+}
+
+pub fn debug_log_to_file_pid_0(message: String, pid: RawFd) -> io::Result<()> {
+    if pid == 0 {
+        debug_log_to_file(message)?;
+    }
+
+    Ok(())
+}
+
+pub fn delete_log_file() -> io::Result<()> {
+    if fs::metadata(MOSAIC_TMP_LOG_FILE).is_ok() {
+        fs::remove_file(MOSAIC_TMP_LOG_FILE)?;
+    }
+
+    Ok(())
+}
+
+pub fn delete_log_dir() -> io::Result<()> {
+    if fs::metadata(MOSAIC_TMP_LOG_DIR).is_ok() {
+        fs::remove_dir_all(MOSAIC_TMP_LOG_DIR)?;
+    }
+    fs::create_dir_all(MOSAIC_TMP_LOG_DIR)?;
+
+    Ok(())
+}
+
+pub fn debug_to_file(message: u8, pid: RawFd) -> io::Result<()> {
+    let mut path = PathBuf::new();
+    path.push(MOSAIC_TMP_LOG_DIR);
+    path.push(format!("mosaic-{}.log", pid.to_string()));
+
+    let mut file = fs::OpenOptions::new()
+        .append(true)
+        .create(true)
+        .open(path)?;
+    file.write_all(&[message])?;
+
+    Ok(())
+}
diff --git a/src/utils/mod.rs b/src/utils/mod.rs
new file mode 100644
index 00000000..140eec18
--- /dev/null
+++ b/src/utils/mod.rs
@@ -0,0 +1,2 @@
+pub mod consts;
+pub mod logging;