Fixes all the command line options for conferences, participants and time period.

CHANGELOG.md

@@ -15,6 +15,9 @@ All notable changes to this project will be documented in this file.
 ### Added
 - Initial changelog following the keepachangelog.com format
 
+### Changed
+- Updated the way jilo-cli handles multiple options, added filtering conferences by time period
+
 ---
 
 ## 0.1 - 2024-06-12

jilo-cli

@@ -7,8 +7,8 @@
 # Command line interface (jilo-cli)
 ###
 
-VERSION="0.1"
-RELEASE_DATE="2024-06-12"
+VERSION="0.1.1-dev"
+RELEASE_DATE="unreleased"
 
 SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)" #"
 
@@ -68,11 +68,12 @@ JOIN (
     GROUP BY
         conference_name
 ) AS name_counts ON c.conference_name = name_counts.conference_name
+JOIN
+    conference_events ce ON c.conference_id = ce.conference_id
+WHERE (ce.time >= '%s' AND ce.time <= '%s')
 ORDER BY
     c.id;"
-db_conferences_id_template="SELECT * FROM conferences WHERE conference_id='%s';"
-db_conferences_name_template="SELECT * FROM conferences WHERE conference_name='%s';"
-db_conference_events_template="SELECT * FROM conference_events WHERE conference_id='%s';"
+
 db_conference_by_id_template="
 SELECT
     pe.time,
@@ -93,6 +94,7 @@ LEFT JOIN
     participant_events pe ON p.endpoint_id = pe.participant_id
 WHERE
     c.conference_id = '%s'
+AND (pe.time >= '%s' AND pe.time <= '%s')
 
 UNION
 
@@ -111,9 +113,11 @@ LEFT JOIN
     conference_events ce ON c.conference_id = ce.conference_id
 WHERE
     c.conference_id = '%s'
+AND (event_time >= '%s' AND event_time <= '%s')
 
 ORDER BY
     pe.time;"
+
 db_conference_by_name_template="
 SELECT
     pe.time,
@@ -134,6 +138,7 @@ LEFT JOIN
     participant_events pe ON p.endpoint_id = pe.participant_id
 WHERE
     c.conference_name = '%s'
+AND (pe.time >= '%s' AND pe.time <= '%s')
 
 UNION
 
@@ -152,20 +157,23 @@ LEFT JOIN
     conference_events ce ON c.conference_id = ce.conference_id
 WHERE
     c.conference_name = '%s'
+AND (event_time >= '%s' AND event_time <= '%s')
 
 ORDER BY
     pe.time;"
 
 ## participant related
 
-db_participants_all_template="SELECT jitsi_component, endpoint_id, conference_id FROM participants ORDER BY id;"
-db_participants_id_template="SELECT * FROM participants WHERE endpoint_id='%s';"
-db_participant_events_template="SELECT * FROM participant_events WHERE participant_id='%s';"
-
-db_participants_endpoint_template="SELECT * FROM participants WHERE endpoint_id='%s';"
-db_participants_conference_template="SELECT * FROM participants WHERE conference_id='%s';"
-db_participants_statsid_template="SELECT * FROM participant_events WHERE event_type = 'stats_id' AND event_param LIKE '%%%s%%';"
-db_participants_ip_template="SELECT * FROM participant_events WHERE event_type = 'pair selected' AND event_param='%s';"
+db_participants_all_template="
+SELECT DISTINCT
+    p.jitsi_component, p.endpoint_id, p.conference_id
+FROM
+    participants p
+JOIN
+    participant_events pe ON p.endpoint_id = pe.participant_id
+WHERE
+    pe.time >= '%s' AND pe.time <= '%s'
+ORDER BY p.id;"
 
 db_conference_by_participant_id_template="
 SELECT
@@ -187,6 +195,7 @@ LEFT JOIN
     participant_events pe ON p.endpoint_id = pe.participant_id
 WHERE
     p.endpoint_id = '%s'
+AND (pe.time >= '%s' AND pe.time <= '%s')
 
 UNION
 
@@ -205,6 +214,7 @@ LEFT JOIN
     conference_events ce ON c.conference_id = ce.conference_id
 WHERE
     participant_id = '%s'
+AND (event_time >= '%s' AND event_time <= '%s')
 
 ORDER BY
     pe.time;"
@@ -228,7 +238,8 @@ LEFT JOIN
 LEFT JOIN
     participant_events pe ON p.endpoint_id = pe.participant_id
 WHERE
-    pe.event_param = '%s'
+    c.conference_id = '%s'
+AND (pe.time >= '%s' AND pe.time <= '%s')
 
 UNION
 
@@ -246,7 +257,51 @@ FROM
 LEFT JOIN
     conference_events ce ON c.conference_id = ce.conference_id
 WHERE
-    event_param = '%s'
+    ce.conference_id = '%s'
+AND (event_time >= '%s' AND event_time <= '%s')
+
+ORDER BY
+    pe.time;"
+
+db_participant_by_conference_name_template="
+SELECT
+    pe.time,
+    c.conference_id,
+    c.conference_name,
+    c.conference_host,
+    pe.loglevel,
+    pe.event_type,
+    p.endpoint_id AS participant_id,
+    pe.event_param
+FROM
+    conferences c
+LEFT JOIN
+    conference_events ce ON c.conference_id = ce.conference_id
+LEFT JOIN
+    participants p ON c.conference_id = p.conference_id
+LEFT JOIN
+    participant_events pe ON p.endpoint_id = pe.participant_id
+WHERE
+    c.conference_name LIKE '%%%s%%'
+AND (pe.time >= '%s' AND pe.time <= '%s')
+
+UNION
+
+SELECT
+    ce.time AS event_time,
+    c.conference_id,
+    c.conference_name,
+    c.conference_host,
+    ce.loglevel,
+    ce.conference_event AS event_type,
+    NULL AS participant_id,
+    ce.conference_param AS event_param
+FROM
+    conferences c
+LEFT JOIN
+    conference_events ce ON c.conference_id = ce.conference_id
+WHERE c.conference_name LIKE '%%%s%%'
+AND (event_time >= '%s' AND event_time <= '%s')
 
 ORDER BY
     pe.time;"
@@ -271,6 +326,7 @@ LEFT JOIN
     participant_events pe ON p.endpoint_id = pe.participant_id
 WHERE
     pe.event_type = 'stats_id' AND pe.event_param LIKE '%%%s%%'
+AND (pe.time >= '%s' AND pe.time <= '%s')
 
 UNION
 
@@ -289,6 +345,7 @@ LEFT JOIN
     conference_events ce ON c.conference_id = ce.conference_id
 WHERE
     event_type = 'stats_id' AND event_param LIKE '%%%s%%'
+AND (event_time >= '%s' AND event_time <= '%s')
 
 ORDER BY
     pe.time;"
@@ -313,6 +370,7 @@ LEFT JOIN
     participant_events pe ON p.endpoint_id = pe.participant_id
 WHERE
     pe.event_type = 'pair selected' AND pe.event_param = '%s'
+AND (pe.time >= '%s' AND pe.time <= '%s')
 
 UNION
 
@@ -331,6 +389,7 @@ LEFT JOIN
     conference_events ce ON c.conference_id = ce.conference_id
 WHERE
     event_type = 'pair selected' AND event_param = '%s'
+AND (event_time >= '%s' AND event_time <= '%s')
 
 ORDER BY
     pe.time;"
@@ -380,13 +439,14 @@ ORDER BY
     pe.time;"
 
 
-
 help="Usage:
     $0 [OPTION]
     Options:
         --conference|-c [conference ID or name] - show specific conference(s), all of empty
-        --participant|-p [participant endpoint ID, conference ID, participant IP, or participant stats ID] - show specific participant(s), all if empty
-        --time|-t - show stats for a time interval
+        --participant|-p [participant endpoint ID, conference ID, conference name, participant IP, or participant stats ID] - show specific participant(s), all if empty
+        --time|-t - show stats for a time interval; can be use separately ot together with -c or -p
+        --verbose|-v - show more details, when available
+        --silent|-s - show less details, more suitable for scripting
         --help|-h - show this help message
         --version|-V - show version"
 
@@ -395,6 +455,16 @@ version="JILO Jitsi Logs Observer command line client
     version $VERSION
     released on $RELEASE_DATE"
 
+time_formats="Expected formats:
+- exact times
+    YYYY-MM-DD, YYYY-MM, YYYY
+- exact periods
+    YYYY-MM-DD:YYYY-MM-DD, YYYY-MM:YYYY-MM, YYYY:YYYY
+- from begining to given time
+    :YYYY-MM-DD, :YYYY-MM, :YYYY
+- from given time until end
+    YYYY-MM-DD:, YYYY-MM:, YYYY:"
+
 
 ###
 
@@ -497,15 +567,7 @@ parse_time_range() {
         until_time="9999-12-31"
 
     else
-        echo -e "Invalid time range. Expected formats:
-- exact times
-    YYYY-MM-DD, YYYY-MM, YYYY
-- exact periods
-    YYYY-MM-DD:YYYY-MM-DD, YYYY-MM:YYYY-MM, YYYY:YYYY
-- from begining to given time
-    :YYYY-MM-DD, :YYYY-MM, :YYYY
-- from given time until end
-    YYYY-MM-DD:, YYYY-MM:, YYYY:" >&2
+        echo -e "Invalid time range. $time_formats" >&2
         exit 1
     fi
 
@@ -514,17 +576,26 @@ parse_time_range() {
 
 ### commandline options
 
-cmd=""
 conference_arg=""
+conference_option=false
 participant_arg=""
-from_time=""
-until_time=""
+participant_option=false
+from_time="0000-00-00"
+until_time="9999-12-31"
+time_option=false
 time_range_specified=false
 
+# display help if no arguments
+if [[ $# -eq 0 ]]; then
+    echo -e "$help"
+    exit 0
+fi
+
+# then check all the options
 while  [[ $# -gt 0 ]]; do
     case "$1" in
         -c | --conference )
-            cmd="--conference"
+            conference_option=true
             if [[ -n "$2" && "$2" != -* ]]; then
                 conference_arg="$2"
                 shift 2
@@ -533,7 +604,7 @@ while  [[ $# -gt 0 ]]; do
             fi
             ;;
         -p | --participant)
-            cmd="--participant"
+            participant_option=true
             if [[ -n "$2" && "$2" != -* ]]; then
                 participant_arg="$2"
                 shift 2
@@ -542,15 +613,23 @@ while  [[ $# -gt 0 ]]; do
             fi
             ;;
         -t | --time)
-            cmd="--time"
+            time_option=true
             if [[ -n "$2" && "$2" != -* ]]; then
                 parse_time_range "$2"
                 shift 2
             else
-                echo "Option -t needs time range argument in format 'from-time - until-time', YYYY-MM-DD - YYYY-MM-DD" >&2
+                echo "Option -t needs a time range argument. $time_formats" >&2
                 exit 1
             fi
             ;;
+        -v | --verbose)
+            verbose=true
+            shift
+            ;;
+        -s | --silent)
+            silent=true
+            shift
+            ;;
         -h | --help)
             echo -e "$help"
             exit 0
@@ -567,27 +646,34 @@ while  [[ $# -gt 0 ]]; do
     esac
 done
 
-case "$cmd" in
+if [[ "$conference_option" == true ]]; then
 
-    --conference)
     # the argument to "--conference" can be either ID or name
     if [[ -n "$conference_arg" ]]; then
 
-            db_conferences_id=$(printf "$db_conferences_id_template" "$conference_arg")
-            conferences_id=$(db_query "$db_conferences_id")
-
-            db_conferences_name=$(printf "$db_conferences_name_template" "$conference_arg")
-            conferences_name=$(db_query "$db_conferences_name")
+        # check for conferences match within a time period (or all if not period given)
+        db_conferences_id=$(printf "$db_conference_by_id_template" "$conference_arg" "$from_time" "$until_time" "$conference_arg" "$from_time" "$until_time")
+        mapfile -t conferences_id < <(db_query "$db_conferences_id")
+        db_conferences_name=$(printf "$db_conference_by_name_template" "$conference_arg" "$from_time" "$until_time" "$conference_arg" "$from_time" "$until_time")
+        mapfile -t conferences_name < <(db_query "$db_conferences_name")
 
         # we check if the argument to "--conference" is a conference ID
         # conference ID is unique, so we show that conference
-            if [[ -n "$conferences_id" ]]; then
-                db_conference=$(printf "$db_conference_by_id_template" "$conference_arg" "$conference_arg")
-                mapfile -t conference_array < <(db_query "$db_conference")
+        if [[ "${#conferences_id[@]}" -gt 0 ]]; then
+
+            output=""
             # prepare the header
+            if [[ "$silent" != true ]]; then
+                header="\nConferences with ID matching \"$IMPORTANT_TEXT$conference_arg$NORMAL_TEXT\""
+                if [[ "$time_range_specified" == true ]]; then
+                    header+=" for the time period \"$from_time - $until_time\""
+                fi
+                header+="\n"
+                echo -e "$header"
                 output="time\tconference ID\tconference name\tconference host\tloglevel\tparticipant ID\tevent\tparameter\n"
+            fi
             # prepare the formatted rows
-                for row in "${conference_array[@]}"; do
+            for row in "${conferences_id[@]}"; do
                 IFS='|' read -r time conference_id conference_name conference_host loglevel event_type participant_id event_param <<< "$row"
                 output+="$time\t$IMPORTANT_TEXT$conference_id$NORMAL_TEXT\t$conference_name\t$conference_host\t$loglevel\t$participant_id\t$event_type\t$event_param\n"
             done
@@ -596,14 +682,21 @@ case "$cmd" in
 
         # then we check if the argument to "--conference" is a conference name
         # if so, we show all matching conferences (conference names are not unique)
-            elif [[ -n "$conferences_name" ]]; then
-                db_conference=$(printf "$db_conference_by_name_template" "$conference_arg" "$conference_arg")
-                mapfile -t conference_array < <(db_query "$db_conference")
+        elif [[ "${#conferences_name[@]}" -gt 0 ]]; then
 
+            output=""
             # prepare the header
+            if [[ "$silent" != true ]]; then
+                header="\nConferences with names matching \"$IMPORTANT_TEXT$conference_arg$NORMAL_TEXT\""
+                if [[ "$time_range_specified" == true ]]; then
+                    header+=" for the time period \"$from_time - $until_time\""
+                fi
+                header+="\n"
+                echo -e "$header"
                 output="time\tconf ID\tconf name\tconf host\tloglevel\tparticipant ID\tevent\tparameter\n"
+            fi
             # prepare the formatted rows
-                for row in "${conference_array[@]}"; do
+            for row in "${conferences_name[@]}"; do
                 IFS='|' read -r time conference_id conference_name conference_host loglevel event_type participant_id event_param <<< "$row"
                 output+="$time\t$conference_id\t$IMPORTANT_TEXT$conference_name$NORMAL_TEXT\t$conference_host\t$loglevel\t$participant_id\t$event_type\t$event_param\n"
             done
@@ -612,12 +705,21 @@ case "$cmd" in
 
         # nothing found for neither conference ID or name
         else
+            if [[ "$silent" != true ]]; then
                 echo "No match found for \"$conference_arg\""
+                if [[ "$time_range_specified" == true ]]; then
+                    echo "and time period $from_time - $until_time"
+                fi
+            fi
         fi
         exit 0
     else
         # if no argument is given, we show all the conferences
-            mapfile -t conference_array < <(db_query "$db_conferences_all_formatted_template")
+        db_conferences_all=$(printf "$db_conferences_all_formatted_template" "$from_time" "$until_time")
+        mapfile -t conference_array < <(db_query "$db_conferences_all")
+
+        # we only format the outrput if there are conferences to show
+        if [[ "${#conference_array[@]}" -gt 0 ]]; then
             # prepare the header
             output="component\tconference ID\tconference name\tname count\tconference host\n"
             # prepare the formatted rows
@@ -627,33 +729,57 @@ case "$cmd" in
             done
             # output
             echo -e "$output" | column -t -s $'\t'
+        else
+            if [[ "$silent" != true ]]; then
+                echo -n "No conferences found"
+                if [[ "$time_range_specified" == true ]]; then
+                    echo -n " for the time period \"$from_time - $until_time\""
+                fi
+                echo "."
+            fi
+        fi
         exit 0
     fi
-        ;;
 
-    --participant)
-        # the argument to "--participant" can be endpointID, conferenceID, startsID, IP address
+elif [[ "$participant_option" == true ]]; then
+
+    # the argument to "--participant" can be endpointID, conferenceID, conference name, startsID, IP address
+    # check for participants match within a time period (or all if period not given)
     # we check for all ot them and show the matches
+## FIXME - we don't catch the case with no results found at all, no message is displayed if no results ## FIXME
     if [[ -n "$participant_arg" ]]; then
-            db_participants_endpoint=$(printf "$db_participants_endpoint_template" "$participant_arg")
-            participants_endpoint=$(db_query "$db_participants_endpoint")
 
-            db_participants_conference=$(printf "$db_participants_conference_template" "$participant_arg")
-            participants_conference=$(db_query "$db_participants_conference")
+        db_participants_endpoint=$(printf "$db_conference_by_participant_id_template" "$participant_arg" "$from_time" "$until_time" "$participant_arg" "$from_time" "$until_time")
+        mapfile -t participants_endpoint < <(db_query "$db_participants_endpoint")
 
-            db_participants_statsid=$(printf "$db_participants_statsid_template" "$participant_arg")
-            participants_statsid=$(db_query "$db_participants_statsid")
+        db_participants_conference=$(printf "$db_participant_by_conference_id_template" "$participant_arg" "$from_time" "$until_time" "$participant_arg" "$from_time" "$until_time")
+        mapfile -t participants_conference < <(db_query "$db_participants_conference")
 
-            db_participants_ip=$(printf "$db_participants_ip_template" "$participant_arg")
-            participants_ip=$(db_query "$db_participants_ip")
+        db_participants_conference_name=$(printf "$db_participant_by_conference_name_template" "$participant_arg" "$from_time" "$until_time" "$participant_arg" "$from_time" "$until_time")
+        mapfile -t participants_conference_name < <(db_query "$db_participants_conference_name")
 
-            if [[ -n $participants_endpoint ]]; then
-                db_participant=$(printf "$db_conference_by_participant_id_template" "$participant_arg" "$participant_arg")
-                mapfile -t conference_array < <(db_query "$db_participant")
+        db_participants_statsid=$(printf "$db_participant_by_stats_id_template" "$participant_arg" "$from_time" "$until_time" "$participant_arg" "$from_time" "$until_time")
+        mapfile -t participants_statsid < <(db_query "$db_participants_statsid")
+
+        db_participants_ip=$(printf "$db_participant_by_ip_template" "$participant_arg" "$from_time" "$until_time" "$participant_arg" "$from_time" "$until_time")
+        mapfile -t participants_ip < <(db_query "$db_participants_ip")
+
+        # match for participant endpoint_id
+        if [[ "${#participants_endpoint[@]}" -gt 0 ]]; then
+
+            output=""
             # prepare the header
+            if [[ "$silent" != true ]]; then
+                header="\nParticipants with ID matching \"$IMPORTANT_TEXT$participant_arg$NORMAL_TEXT\""
+                if [[ "$time_range_specified" == true ]]; then
+                    header+=" for the time period \"$from_time - $until_time\""
+                fi
+                header+="\n"
+                echo -e "$header"
                 output="time\tconference ID\tconference name\tconference host\tloglevel\tparticipant ID\tevent\tparameter\n"
+            fi
             # prepare the formatted rows
-                for row in "${conference_array[@]}"; do
+            for row in "${participants_endpoint[@]}"; do
                 IFS='|' read -r time conference_id conference_name conference_host loglevel event_type participant_id event_param <<< "$row"
                 output+="$time\t$conference_id\t$conference_name\t$conference_host\t$loglevel\t$IMPORTANT_TEXT$participant_id$NORMAL_TEXT\t$event_type\t$event_param\n"
             done
@@ -661,13 +787,22 @@ case "$cmd" in
             echo -e "$output" | column -t -s $'\t'
         fi
 
-            if [[ -n $participants_conference ]]; then
-                db_participant=$(printf "$db_participant_by_conference_id_template" "$participant_arg" "$participant_arg")
-                mapfile -t conference_array < <(db_query "$db_participant")
+        # match for conference_id the participant was in
+        if [[ "${#participants_conference[@]}" -gt 0 ]]; then
+
+            output=""
             # prepare the header
-                output="time\tconference ID\tconference name\tconference host\tloglevel\tparticipant ID\tevent\tparameter\n"
+            if [[ "$silent" != true ]]; then
+                header="\nParticipants in conferences with ID matching \"$IMPORTANT_TEXT$participant_arg$NORMAL_TEXT\""
+                if [[ "$time_range_specified" == true ]]; then
+                    header+=" for the time period \"$from_time - $until_time\""
+                fi
+                header+="\n"
+                echo -e "$header"
+                output+="time\tconference ID\tconference name\tconference host\tloglevel\tparticipant ID\tevent\tparameter\n"
+            fi
             # prepare the formatted rows
-                for row in "${conference_array[@]}"; do
+            for row in "${participants_conference[@]}"; do
                 IFS='|' read -r time conference_id conference_name conference_host loglevel event_type participant_id event_param <<< "$row"
                 output+="$time\t$IMPORTANT_TEXT$conference_id$NORMAL_TEXT\t$conference_name\t$conference_host\t$loglevel\t$participant_id\t$event_type\t$event_param\n"
             done
@@ -675,13 +810,45 @@ case "$cmd" in
             echo -e "$output" | column -t -s $'\t'
         fi
 
-            if [[ -n $participants_statsid ]]; then
-                db_participant=$(printf "$db_participant_by_stats_id_template" "$participant_arg" "$participant_arg")
-                mapfile -t conference_array < <(db_query "$db_participant")
+        # match for conference_name the participant was in
+        if [[ "${#participants_conference_name[@]}" -gt 0 ]]; then
+
+            output=""
             # prepare the header
-                output="time\tconference ID\tconference name\tconference host\tloglevel\tparticipant ID\tevent\tparameter\n"
+            if [[ "$silent" != true ]]; then
+                header="\nParticipants in conferences with name that include the string \"$IMPORTANT_TEXT$participant_arg$NORMAL_TEXT\""
+                if [[ "$time_range_specified" == true ]]; then
+                    header+=" for the time period \"$from_time - $until_time\""
+                fi
+                header+="\n"
+                echo -e "$header"
+                output+="time\tconference ID\tconference name\tconference host\tloglevel\tparticipant ID\tevent\tparameter\n"
+            fi
             # prepare the formatted rows
-                for row in "${conference_array[@]}"; do
+            for row in "${participants_conference_name[@]}"; do
+                IFS='|' read -r time conference_id conference_name conference_host loglevel event_type participant_id event_param <<< "$row"
+                output+="$time\t$conference_id\t$IMPORTANT_TEXT$conference_name$NORMAL_TEXT\t$conference_host\t$loglevel\t$participant_id\t$event_type\t$event_param\n"
+            done
+            # output
+            echo -e "$output" | column -t -s $'\t'
+        fi
+
+        # match for participant stats_id
+        if [[ "${#participants_statsid[@]}" -gt 0 ]]; then
+
+            output=""
+            # prepare the header
+            if [[ "$silent" != true ]]; then
+                header="\nParticipants with stats ID that include the string \"$IMPORTANT_TEXT$participant_arg$NORMAL_TEXT\""
+                if [[ "$time_range_specified" == true ]]; then
+                    header+=" for the time period \"$from_time - $until_time\""
+                fi
+                header+="\n"
+                echo -e "$header"
+                output+="time\tconference ID\tconference name\tconference host\tloglevel\tparticipant ID\tevent\tparameter\n"
+            fi
+            # prepare the formatted rows
+            for row in "${participants_statsid[@]}"; do
                 IFS='|' read -r time conference_id conference_name conference_host loglevel event_type participant_id event_param <<< "$row"
                 output+="$time\t$conference_id\t$conference_name\t$conference_host\t$loglevel\t$participant_id\t$event_type\t$IMPORTANT_TEXT$event_param$NORMAL_TEXT\n"
             done
@@ -689,13 +856,22 @@ case "$cmd" in
             echo -e "$output" | column -t -s $'\t'
         fi
 
-            if [[ -n $participants_ip ]]; then
-                db_participant=$(printf "$db_participant_by_ip_template" "$participant_arg" "$participant_arg")
-                mapfile -t conference_array < <(db_query "$db_participant")
+        # match for participant IP
+        if [[ "${#participants_ip[@]}" -gt 0 ]]; then
+
+            output=""
             # prepare the header
-                output="time\tconference ID\tconference name\tconference host\tloglevel\tparticipant ID\tevent\tparameter\n"
+            if [[ "$silent" != true ]]; then
+                header="\nParticipants with IP address matching \"$IMPORTANT_TEXT$participant_arg$NORMAL_TEXT\""
+                if [[ "$time_range_specified" == true ]]; then
+                    header+=" for the time period \"$from_time - $until_time\""
+                fi
+                header+="\n"
+                echo -e "$header"
+                output+="time\tconference ID\tconference name\tconference host\tloglevel\tparticipant ID\tevent\tparameter\n"
+            fi
             # prepare the formatted rows
-                for row in "${conference_array[@]}"; do
+            for row in "${participants_ip[@]}"; do
                 IFS='|' read -r time conference_id conference_name conference_host loglevel event_type participant_id event_param <<< "$row"
                 output+="$time\t$conference_id\t$conference_name\t$conference_host\t$loglevel\t$participant_id\t$event_type\t$IMPORTANT_TEXT$event_param$NORMAL_TEXT\n"
             done
@@ -705,10 +881,24 @@ case "$cmd" in
 
         exit 0
     else
-            db_participants_all=$(printf "$db_participants_all_template" )
+
+        # if no argument is given, we show all the participants
+        db_participants_all=$(printf "$db_participants_all_template" "$from_time" "$until_time")
         mapfile -t participant_array < <(db_query "$db_participants_all")
+
+        # we only format the outrput if there are conferences to show
+        if [[ "${#participant_array[@]}" -gt 0 ]]; then
+            output=""
             # prepare the header
-            output="component\tparticipant ID\tconference ID\n"
+            if [[ "$silent" != true ]]; then
+                header="\nAll participants"
+                if [[ "$time_range_specified" == true ]]; then
+                    header+=" for the time period \"$IMPORTANT_TEXT$from_time - $until_time$NORMAL_TEXT\""
+                fi
+                header+="\n"
+                echo -e "$header"
+                output+="component\tparticipant ID\tconference ID\n"
+            fi
             # prepare the formatted rows
             for row in "${participant_array[@]}"; do
                 IFS='|' read -r jitsi_component endpoint_id conference_id <<< "$row"
@@ -716,30 +906,49 @@ case "$cmd" in
             done
             # output
             echo -e "$output" | column -t -s $'\t'
+        else
+            if [[ "$silent" != true ]]; then
+                echo -n "No participants found"
+                if [[ "$time_range_specified" == true ]]; then
+                    echo -n " for the time period \"$from_time - $until_time\""
+                fi
+                echo "."
+            fi
+        fi
         exit 0
     fi
-        ;;
 
-    --time)
+elif [[ "$time_option" == true ]]; then
+
     if [[ "$time_range_specified" == true ]]; then
-            echo "Events in the period $from_time - $until_time"
         db_events_time=$(printf "$db_events_by_period_template" "$from_time" "$until_time" "$from_time" "$until_time")
         mapfile -t events_array < <(db_query "$db_events_time")
+
+        if [[ "${#events_array[@]}" -gt 0 ]]; then
+            output=""
             # prepare the header
+            if [[ "$silent" != true ]]; then
+                header="\nEvents in the period \"$IMPORTANT_TEXT$from_time - $until_time$NORMAL_TEXT\"\n"
                 output="time\tconference ID\tconference name\tconference host\tloglevel\tparticipant ID\tevent\tparameter\n"
+                echo -e "$header"
+            fi
             # prepare the formatted rows
             for row in "${events_array[@]}"; do
                 IFS='|' read -r time conference_id conference_name conference_host loglevel event_type participant_id event_param <<< "$row"
-                output+="$time\t$conference_id\t$conference_name\t$conference_host\t$loglevel\t$event_type\t$participant_id\t$event_param\n"
+                output+="$IMPORTANT_TEXT$time$NORMAL_TEXT\t$conference_id\t$conference_name\t$conference_host\t$loglevel\t$event_type\t$participant_id\t$event_param\n"
             done
             # output
             echo -e "$output" | column -t -s $'\t'
+        else
+            if [[ "$silent" != true ]]; then
+                echo -n "No events found"
+                if [[ "$time_range_specified" == true ]]; then
+                    echo -n " for the time period \"$from_time - $until_time\""
+                fi
+                echo "."
+            fi
+        fi
         exit 0
     fi
-        ;;
 
-    *)
-        echo -e "$help"
-        exit 1
-        ;;
-esac
+fi