Adds database file and database schema checks.

.gitignore

@@ -1,3 +1,4 @@
 *.log
 *.log.*
 jitsi-stats.db
+jilo.db

jvb/jilo.conf

@@ -0,0 +1,4 @@
+# jilo.conf - configuration variables for JItso Log Observer
+LOGFILE="./jvb.log"
+ROTATED_LOGFILE="./jvb.log.1"
+DB="./jilo.db"

jvb/jitsi-stats

@@ -1,12 +1,25 @@
 #!/usr/bin/env bash
 
-### Variables
+### Default configuration
 
-# log files
-LOGFILE="./jvb.log"
-ROTATED_LOGFILE="./jvb.log.1"
-# SQLite database file
-DB="./jitsi-stats.db"
+# default log files
+DEFAULT_LOGFILE="./jvb.log"
+DEFAULT_ROTATED_LOGFILE="./jvb.log.1"
+# Default SQLite database file
+DEFAULT_DB="./jitsi-stats.db"
+
+# Configuration file
+CONFIG_FILE="./jilo.conf"
+
+# Load configurations from the config file if it exists
+if [[ -f "$CONFIG_FILE" ]]; then
+    source "$CONFIG_FILE"
+fi
+
+# use default values if not overriden by config file
+LOGFILE=${LOGFILE:-$DEFAULT_LOGFILE}
+ROTATED_LOGFILE=${ROTATED_LOGFILE:-$DEFAULT_ROTATED_LOGFILE}
+DB=${DB:-$DEFAULT_DB}
 
 ###
 
@@ -187,6 +200,18 @@ case "$cmd" in
 
     --check)
 
+        # First check if database exists
+        if [[ ! -f $"DB" ]]; then
+            echo "Database not found. If it's a fresh install, please install the database first."
+            exit 1
+        fi
+
+        # Check the state table
+        if ! sqlite3 "$DB" ".schema state" &>/dev/null; then
+            echo "The database doesn't contain the required table \"state\". Please check it, and if needed, reinstall it."
+            exit 1
+        fi
+
         # Retrieve last log file and position inside it
         IFS='|' read -r last_file last_filetime last_size last_pos last_inode <<< $(get_state)