feat: add "check" command

Sanity check Quipucords setup and configurations.
This command will check and print the status of important
files and directories that the installer creates for running Quipucords.

Example of status: OK, Not owned by you and Missing.
The return code for the command is the number of problematic files/dirs.

Relates to JIRA: DISCOVERY-729

bin/quipucords-installer

@@ -26,6 +26,7 @@ usage() {
   echo "  uninstall                     Uninstall Quipucords"
   echo "  create-server-password        Create a Quipucords server password"
   echo "  create-app-secret             Create a Quipucords application secret"
+  echo "  check                         Check Quipucords setup and configurations"
   exit 1
 }
 
@@ -74,6 +75,7 @@ set_default_vars() {
   # Do not allow a user's custom PATH environment to interfere.
   export PATH="${INSTALLER_BIN_DIR}:/usr/bin:/bin:/usr/sbin:/sbin"
 
+  QUIPUCORDS_CONFIG_DIR="${XDG_CONFIG_HOME:-$HOME/.config}/quipucords"
   QUIPUCORDS_ENV_DIR="${XDG_CONFIG_HOME:-$HOME/.config}/quipucords/env"
   QUIPUCORDS_DATA_DIR="${XDG_DATA_HOME:-$HOME/.local/share}/quipucords"
   SYSTEMD_CONFIG_DIR="${XDG_CONFIG_HOME:-$HOME/.config}/containers/systemd"
@@ -157,6 +159,10 @@ EOFDOC
   uninstall)
     uninstall
     ;;
+  check)
+    check
+    exit $?
+    ;;
   create-server-password)
     create-server-password
     exit $?
@@ -409,6 +415,75 @@ upgrade() {
   return $?
 }
 
+check_directory_status() {
+  if [ -d "${1}" ]; then
+    if [ -O "${1}" ]; then
+      return 0 # OK
+    else
+      return 1 # Not owned by you
+    fi
+  fi
+  return 2 # Missing
+}
+
+check_file_status() {
+  if [ -f "${1}" ]; then
+    if [ -O "${1}" ]; then
+      return 0 # OK
+    else
+      return 1 # Not owned by you
+    fi
+  fi
+  return 2 # Missing
+}
+
+check_and_print_status() {
+  if [ "${1}" == "d" ]; then
+    check_directory_status "${2}"
+  else
+    check_file_status "${2}"
+  fi
+  local status=$?
+  if [ $status -eq 0 ]; then
+    echo "${2}: OK"
+    return 0
+  fi
+  if [ $status -eq 1 ]; then
+    echo "${2}: ERROR: Not owned by you"
+    return 1
+  fi
+  echo "${2}: ERROR: Missing"
+  return 2
+}
+
+check() {
+  echo "Checking Quipucords setup and configurations..."
+  local result=0
+  check_and_print_status d "${QUIPUCORDS_DATA_DIR}" || result=$((result + 1))
+  for name in certs data db log sshkeys; do
+    local subdirectory="${QUIPUCORDS_DATA_DIR}/$name"
+    check_and_print_status d "$subdirectory" || result=$((result + 1))
+  done
+  check_and_print_status f "${QUIPUCORDS_DATA_DIR}/certs/server.key" || result=$((result + 1))
+  check_and_print_status f "${QUIPUCORDS_DATA_DIR}/certs/server.crt" || result=$((result + 1))
+  check_and_print_status f "${QUIPUCORDS_DATA_DIR}/data/secret.txt" || result=$((result + 1))
+  check_and_print_status d "${QUIPUCORDS_DATA_DIR}/db/userdata" || result=$((result + 1))
+  check_and_print_status d "${QUIPUCORDS_CONFIG_DIR}" || result=$((result + 1))
+  check_and_print_status d "${QUIPUCORDS_ENV_DIR}" || result=$((result + 1))
+  for name in ansible app celery-worker db redis server; do
+    local env_file="$QUIPUCORDS_ENV_DIR/env-${name}.env"
+    check_and_print_status f "${env_file}" || result=$((result + 1))
+  done
+  check_and_print_status d "${SYSTEMD_CONFIG_DIR}" || result=$((result + 1))
+  for name in app celery-worker db redis server; do
+    local container_file="${SYSTEMD_CONFIG_DIR}/quipucords-${name}.container"
+    check_and_print_status f "${container_file}" || result=$((result + 1))
+  done
+  local network_file="${SYSTEMD_CONFIG_DIR}/quipucords.network"
+  check_and_print_status f "${network_file}" || result=$((result + 1))
+  return $result
+}
+
 stop_containers() {
   echo "Stopping Quipucords ..."
   systemctl --user stop quipucords-app || true