bot: Begin porting to Z Shell

Signed-off-by: Maria Lisina <sekoohaka.sarisan@gmail.com>

28 files changed, 329 insertions, 371 deletions

diff --git a/units/dump.sh b/units/dump.zsh
index 904d012..8c857da 100644
--- a/units/dump.sh
+++ b/units/dump.zsh
@@ -2,19 +2,19 @@
 # Copyright (C) 2024-2025 Danil Lisin
 # SPDX-License-Identifier: Apache-2.0
 
-if [ -z "${collect_dumps}" ]
+if [[ -z "${collect_dumps}" ]]
 then
     return 0
 fi
 
-if [ -n "${dump}" ]
+if [[ -n "${dump}" ]]
 then
     mkdir -p "${dumps}/${update_id}"
 fi
 
 for cache_dump in ${dump}
 do
-    if [ -f "${cache}/${cache_dump}" ]
+    if [[ -f "${cache}/${cache_dump}" ]]
     then
         cp "${cache}/${cache_dump}" "${dumps}/${update_id}"
     fi
diff --git a/units/help.sh b/units/help.zsh
index ffc9de0..ffc9de0 100644
--- a/units/help.sh
+++ b/units/help.zsh
diff --git a/units/ib_auth.sh b/units/ib_auth.zsh
index 20c16dc..444e746 100644
--- a/units/ib_auth.sh
+++ b/units/ib_auth.zsh
@@ -2,9 +2,9 @@
 # Copyright (C) 2024-2025 Danil Lisin
 # SPDX-License-Identifier: Apache-2.0
 
-if [ -z "${ib_login}" ]
+if [[ -z "${ib_login}" ]]
 then
-    if [ -f "${user_config}/${ib_config}/${ib_login_file}" ]
+    if [[ -f "${user_config}/${ib_config}/${ib_login_file}" ]]
     then
         ib_login="$(cat "${user_config}/${ib_config}/${ib_login_file}")"
     else
@@ -13,9 +13,9 @@ then
     fi
 fi
 
-if [ -z "${ib_key}" ]
+if [[ -z "${ib_key}" ]]
 then
-    if [ -f "${user_config}/${ib_config}/${ib_key_file}" ]
+    if [[ -f "${user_config}/${ib_config}/${ib_key_file}" ]]
     then
         ib_key="$(cat "${user_config}/${ib_config}/${ib_key_file}")"
     else
@@ -47,8 +47,8 @@ case "${ib_board}" in
             output_text="Failed to process request"
             log_text="ib_auth (${update_id}): ${output_text}"
 
-            . "${units}/log.sh"
-            . "${units}/dump.sh"
+            . "${units}/log.zsh"
+            . "${units}/dump.zsh"
 
             return 0
         fi
@@ -58,30 +58,30 @@ case "${ib_board}" in
             output_text="An unknown error occurred"
             log_text="ib_auth (${update_id}): ${output_text}"
 
-            . "${units}/log.sh"
-            . "${units}/dump.sh"
+            . "${units}/log.zsh"
+            . "${units}/dump.zsh"
 
             return 0
         fi
 
-        if [ "$(jq -r '.success' "${ib_auth_file}")" = "false" ]
+        if [[ "$(jq -r '.success' "${ib_auth_file}")" = "false" ]]
         then
             output_text="Error: <code>$(jq -r '.message' "${ib_auth_file}" | htmlescape)</code>"
             log_text="ib_auth (${update_id}): $(jq -r '.message' "${ib_auth_file}")"
 
-            . "${units}/log.sh"
-            . "${units}/dump.sh"
+            . "${units}/log.zsh"
+            . "${units}/dump.zsh"
 
             return 0
         fi
 
-        if [ "$(jq -r '.name' "${ib_auth_file}")" != "${ib_login}" ]
+        if [[ "$(jq -r '.name' "${ib_auth_file}")" != "${ib_login}" ]]
         then
             output_text="An unexpected error occurred"
             log_text="ib_auth (${update_id}): ${output_text}"
 
-            . "${units}/log.sh"
-            . "${units}/dump.sh"
+            . "${units}/log.zsh"
+            . "${units}/dump.zsh"
 
             return 0
         fi
@@ -125,8 +125,8 @@ case "${ib_board}" in
             output_text="Failed to process request"
             log_text="ib_auth (${update_id}): ${output_text}"
 
-            . "${units}/log.sh"
-            . "${units}/dump.sh"
+            . "${units}/log.zsh"
+            . "${units}/dump.zsh"
 
             return 0
         fi
@@ -136,19 +136,19 @@ case "${ib_board}" in
             output_text="An unknown error occurred"
             log_text="ib_auth (${update_id}): ${output_text}"
 
-            . "${units}/log.sh"
-            . "${units}/dump.sh"
+            . "${units}/log.zsh"
+            . "${units}/dump.zsh"
 
             return 0
         fi
 
-        if [ "$(jq -r '.success' "${ib_auth_file}")" != "true" ]
+        if [[ "$(jq -r '.success' "${ib_auth_file}")" != "true" ]]
         then
             output_text="Error: <code>$(jq -r '.error' "${ib_auth_file}" | htmlescape)</code>"
             log_text="ib_auth (${update_id}): $(jq -r '.error' "${ib_auth_file}")"
 
-            . "${units}/log.sh"
-            . "${units}/dump.sh"
+            . "${units}/log.zsh"
+            . "${units}/dump.zsh"
 
             return 0
         fi
@@ -173,8 +173,8 @@ case "${ib_board}" in
             output_text="Failed to process request"
             log_text="ib_auth (${update_id}): ${output_text}"
 
-            . "${units}/log.sh"
-            . "${units}/dump.sh"
+            . "${units}/log.zsh"
+            . "${units}/dump.zsh"
 
             return 0
         fi
@@ -184,8 +184,8 @@ case "${ib_board}" in
             output_text="Invalid username or API key"
             log_text="ib_auth (${update_id}): ${output_text}"
 
-            . "${units}/log.sh"
-            . "${units}/dump.sh"
+            . "${units}/log.zsh"
+            . "${units}/dump.zsh"
 
             return 0
         fi
diff --git a/units/ib_authconfig.sh b/units/ib_authconfig.zsh
index 31dc7ba..31dc7ba 100644
--- a/units/ib_authconfig.sh
+++ b/units/ib_authconfig.zsh
diff --git a/units/ib_cache.sh b/units/ib_cache.zsh
index cd6946c..0f4c604 100644
--- a/units/ib_cache.sh
+++ b/units/ib_cache.zsh
@@ -10,7 +10,7 @@ done
 ib_post="$(jq -c ".${ib_iarray}[${array_count}]" "${ib_file}")"
 ib_file="${cache}/${ib_hash}.json"
 
-if [ -n "${ib_iarray}" ]
+if [[ -n "${ib_iarray}" ]]
 then
     printf '{"%s":[%s]}' "${ib_iarray}" "${ib_post}" | jq -c > "${ib_file}"
 else
diff --git a/units/ib_common.sh b/units/ib_common.zsh
index 43ad6e9..9ee1b09 100644
--- a/units/ib_common.sh
+++ b/units/ib_common.zsh
@@ -2,15 +2,15 @@
 # Copyright (C) 2024-2025 Danil Lisin
 # SPDX-License-Identifier: Apache-2.0
 
-if [ -n "${1}" ]
+if [[ -n "${1}" ]]
 then
     ib_board="${1}"
     ib_mode="p"
 
-    . "${units}/ib_config.sh"
-    . "${units}/ib_authconfig.sh"
+    . "${units}/ib_config.zsh"
+    . "${units}/ib_authconfig.zsh"
 
-    if [ -z "${ib_data_url}" ]
+    if [[ -z "${ib_data_url}" ]]
     then
         output_title="Invalid arguments"
         output_text="Unsupported image board"
@@ -28,22 +28,22 @@ else
     return 0
 fi
 
-if [ -n "${1}" ]
+if [[ -n "${1}" ]]
 then
     ib_post_id="${1}"
     shift
 else
     output_title="Invalid arguments"
-    output_text="You must specify the post ID or the MD5 hash"
+    output_text="You must specify the post ID or the MD5 h.zsh"
     notification_text="${output_text}"
 
     return 0
 fi
 
-if [ ${#ib_post_id} -eq 32 ]
+if [[ ${#ib_post_id} -eq 32 ]]
 then
     ib_query="md5:${ib_post_id}"
-elif [ "${ib_name}" = "Idol Complex" ]
+elif [[ "${ib_name}" = "Idol Complex" ]]
 then
     ib_query="id_range:${ib_post_id}"
 else
@@ -51,4 +51,4 @@ else
 fi
 
 ib_hash="$(printf "%s%s%s" "${user_id}" "${ib_board}" "${ib_post_id}" | enhash)"
-. "${units}/ib_file.sh"
+. "${units}/ib_file.zsh"
diff --git a/units/ib_config.sh b/units/ib_config.zsh
index fcd0bcf..070ae20 100644
--- a/units/ib_config.sh
+++ b/units/ib_config.zsh
@@ -21,20 +21,20 @@ case "${ib_board}" in
             ;;
         esac
 
-        ib_ratings="
+        ib_ratings=(
             g general
             s sensitive
             q questionable
             e explicit
-        "
+        )
 
-        ib_groups="
+        ib_groups=(
             tag_string_artist Artist
             tag_string_copyright Copyright
             tag_string_character Character
             tag_string_general General
             tag_string_meta Meta
-        "
+        )
 
         case "${ib_mode}" in
             (l)
@@ -92,17 +92,17 @@ case "${ib_board}" in
         ib_api="https://gelbooru.com"
         ib_url="https://gelbooru.com"
 
-        ib_ratings="
+        ib_ratings=(
             safe safe
             general general
             sensitive sensitive
             questionable questionable
             explicit explicit
-        "
+        )
 
-        ib_groups="
+        ib_groups=(
             tags Tags
-        "
+        )
 
         case "${ib_mode}" in
             (p)
@@ -160,23 +160,23 @@ case "${ib_board}" in
         ib_api="https://iapi.sankakucomplex.com"
         ib_url="https://idol.sankakucomplex.com"
 
-        ib_ratings="
+        ib_ratings=(
             s safe
             q questionable
             e explicit
-        "
+        )
 
-        ib_groups="
-            tags[]|select(.type==1)|.name Idol
-            tags[]|select(.type==2)|.name Studio
-            tags[]|select(.type==3)|.name Copyright
-            tags[]|select(.type==4)|.name Character
-            tags[]|select(.type==6)|.name Genre
-            tags[]|select(.type==5)|.name Set
-            tags[]|select(.type==0)|.name General
-            tags[]|select(.type==8)|.name Medium
-            tags[]|select(.type==9)|.name Meta
-        "
+        ib_groups=(
+            "tags[]|select(.type==1)|.name" Idol
+            "tags[]|select(.type==2)|.name" Studio
+            "tags[]|select(.type==3)|.name" Copyright
+            "tags[]|select(.type==4)|.name" Character
+            "tags[]|select(.type==6)|.name" Genre
+            "tags[]|select(.type==5)|.name" Set
+            "tags[]|select(.type==0)|.name" General
+            "tags[]|select(.type==8)|.name" Medium
+            "tags[]|select(.type==9)|.name" Meta
+        )
 
         case "${ib_mode}" in
             (l)
@@ -233,22 +233,22 @@ case "${ib_board}" in
         ib_api="https://sankakuapi.com"
         ib_url="https://chan.sankakucomplex.com"
 
-        ib_ratings="
+        ib_ratings=(
             s safe
             q questionable
             e explicit
-        "
+        )
 
-        ib_groups="
-            tags[]|select(.type==1)|.tagName Artist
-            tags[]|select(.type==2)|.tagName Studio
-            tags[]|select(.type==3)|.tagName Copyright
-            tags[]|select(.type==4)|.tagName Character
-            tags[]|select(.type==5)|.tagName Genre
-            tags[]|select(.type==0)|.tagName General
-            tags[]|select(.type==8)|.tagName Medium
-            tags[]|select(.type==9)|.tagName Meta
-        "
+        ib_groups=(
+            "tags[]|select(.type==1)|.tagName" Artist
+            "tags[]|select(.type==2)|.tagName" Studio
+            "tags[]|select(.type==3)|.tagName" Copyright
+            "tags[]|select(.type==4)|.tagName" Character
+            "tags[]|select(.type==5)|.tagName" Genre
+            "tags[]|select(.type==0)|.tagName" General
+            "tags[]|select(.type==8)|.tagName" Medium
+            "tags[]|select(.type==9)|.tagName" Meta
+        )
 
         case "${ib_mode}" in
             (l)
@@ -311,15 +311,15 @@ case "${ib_board}" in
             ;;
         esac
 
-        ib_ratings="
+        ib_ratings=(
             s safe
             q questionable
             e explicit
-        "
+        )
 
-        ib_groups="
+        ib_groups=(
             tags Tags
-        "
+        )
 
         case "${ib_mode}" in
             (l)
diff --git a/units/ib_date.sh b/units/ib_date.zsh
index e674238..803a386 100644
--- a/units/ib_date.sh
+++ b/units/ib_date.zsh
@@ -2,14 +2,14 @@
 # Copyright (C) 2024-2025 Danil Lisin
 # SPDX-License-Identifier: Apache-2.0
 
-if [ -n "${ib_created_at}" ] && [ "${ib_created_at}" != "null" ]
+if [[ -n "${ib_created_at}" && "${ib_created_at}" != "null" ]]
 then
-    if [ -n "${ib_itzfield}" ]
+    if [[ -n "${ib_itzfield}" ]]
     then
         ib_created_at="$(printf "%s" "${ib_created_at}" | parameter ${ib_itzfield})"
     fi
 
-    if [ -n "${ib_idate}" ]
+    if [[ -n "${ib_idate}" ]]
     then
         ib_date_text="$(date -ud "${ib_created_at}" -D "${ib_idate}" +"%Y-%m-%d %H:%M")"
     else
diff --git a/units/ib_file.sh b/units/ib_file.zsh
index 4009f52..0dff7fb 100644
--- a/units/ib_file.sh
+++ b/units/ib_file.zsh
@@ -10,40 +10,40 @@ done
 ib_file="${cache}/${ib_hash}.json"
 dump="${dump} ${ib_file##*/}"
 
-if [ -f "${ib_file}" ] && [ "${caching_mode}" != "none" ]
+if [[ -f "${ib_file}" && "${caching_mode}" != "none" ]]
 then
     ib_ctime=$(date +%s)
     ib_mtime=$(stat -c %Y "${ib_file}")
 
-    if [ $((ib_ctime - ib_mtime)) -le $((caching_time - 15)) ]
+    if [[ $((ib_ctime - ib_mtime)) -le $((caching_time - 15)) ]]
     then
         rm -fr "${cache}/${ib_hash}.lock"
         return 0
     fi
 fi
 
-if [ -n "${ib_config}" ]
+if [[ -n "${ib_config}" ]]
 then
-    . "${units}/ib_token.sh"
+    . "${units}/ib_token.zsh"
 
-    if [ -n "${output_text}" ]
+    if [[ -n "${output_text}" ]]
     then
         rm -fr "${cache}/${ib_hash}.lock"
         return 0
     fi
 fi
 
-if [ -n "${ib_limit}" ]
+if [[ -n "${ib_limit}" ]]
 then
     ib_limit="${ib_dlimit}=${ib_limit}"
 fi
 
-if [ -n "${ib_page}" ]
+if [[ -n "${ib_page}" ]]
 then
     ib_page="${ib_dpage}=$((ib_page + ib_ioffset))"
 fi
 
-if [ -n "${ib_query}" ]
+if [[ -n "${ib_query}" ]]
 then
     ib_query="${ib_dquery}=${ib_query}"
 fi
@@ -75,8 +75,8 @@ then
 
     next_offset=${inline_page:-0}
 
-    . "${units}/log.sh"
-    . "${units}/dump.sh"
+    . "${units}/log.zsh"
+    . "${units}/dump.zsh"
 
     rm -fr "${ib_file}" "${cache}/${ib_hash}.lock"
     return 0
@@ -89,8 +89,8 @@ then
     notification_text="${output_text}"
     log_text="ib_file (${update_id}): ${output_text}"
 
-    . "${units}/log.sh"
-    . "${units}/dump.sh"
+    . "${units}/log.zsh"
+    . "${units}/dump.zsh"
 
     rm -fr "${ib_file}" "${cache}/${ib_hash}.lock"
     return 0
@@ -98,14 +98,14 @@ fi
 
 if ! jq -e ".${ib_iarray}[0]|has(\"${ib_iid}\")" "${ib_file}" > /dev/null
 then
-    if [ -n "${inline_options}" ] && [ -n "${offset}" ]
+    if [[ -n "${inline_options}" && -n "${offset}" ]]
     then
         output_title="End of results"
     else
         output_title="No results found"
     fi
 
-    if [ -n "${inline_options}" ]
+    if [[ -n "${inline_options}" ]]
     then
         case "${ib_mode}" in
             (l)
@@ -119,7 +119,7 @@ then
             ;;
         esac
     else
-        output_text="Try different post ID or MD5 hash"
+        output_text="Try different post ID or MD5 h.zsh"
     fi
 
     notification_text="${output_text}"
diff --git a/units/ib_hash.sh b/units/ib_hash.zsh
index 22bfe95..f579180 100644
--- a/units/ib_hash.sh
+++ b/units/ib_hash.zsh
@@ -4,15 +4,15 @@
 
 ib_mode="p"
 
-. "${units}/ib_config.sh"
-. "${units}/ib_authconfig.sh"
+. "${units}/ib_config.zsh"
+. "${units}/ib_authconfig.zsh"
 
 ib_query="md5:${ib_post_md5}"
 
 ib_hash="$(printf "%s%s%s" "${user_id}" "${ib_board}" "${ib_post_md5}" | enhash)"
-. "${units}/ib_file.sh"
+. "${units}/ib_file.zsh"
 
-if [ -z "${output_text}" ]
+if [[ -z "${output_text}" ]]
 then
     ib_id="$(jq -r ".${ib_iarray}[0].${ib_iid}" "${ib_file}")"
     printf "<b>%s ID:</b> <code>%s</code>\n" "${ib_name}" "${ib_id}" >> "${ib_posts}"
diff --git a/units/ib_lock.sh b/units/ib_lock.zsh
index a8897bc..e80df6c 100644
--- a/units/ib_lock.sh
+++ b/units/ib_lock.zsh
@@ -7,6 +7,6 @@ do
     sleep 1
 done
 
-. "${units}/ib_auth.sh"
+. "${units}/ib_auth.zsh"
 
 rm -fr "${user_config}_auth.lock"
diff --git a/units/ib_meta.sh b/units/ib_meta.zsh
index a845a25..0484b5e 100644
--- a/units/ib_meta.sh
+++ b/units/ib_meta.zsh
@@ -2,7 +2,7 @@
 # Copyright (C) 2024-2025 Danil Lisin
 # SPDX-License-Identifier: Apache-2.0
 
-if [ -n "${ib_file_url}" ] && [ "${ib_file_url}" != "null" ]
+if [[ -n "${ib_file_url}" && "${ib_file_url}" != "null" ]]
 then
     ib_sample_url="$(jq -r ".${ib_iarray}[${array_count}].${ib_isample}" "${ib_file}")"
     ib_preview_url="$(jq -r ".${ib_iarray}[${array_count}].${ib_ipreview}" "${ib_file}")"
@@ -10,33 +10,33 @@ then
     ib_height="$(jq -r ".${ib_iarray}[${array_count}].${ib_iheight}" "${ib_file}")"
     ib_type="$(printf "%s" "${ib_file_url}" | eval ${ib_ifilename} | cut -d '.' -f 2)"
 
-    if [ "${ib_name}" = "Idol Complex" ]
+    if [[ "${ib_name}" = "Idol Complex" ]]
     then
         ib_file_url="https:${ib_file_url}"
     fi
 
-    if [ -z "${ib_sample_url}" ] || [ "${ib_sample_url}" = "null" ]
+    if [[ -z "${ib_sample_url}" || "${ib_sample_url}" = "null" ]]
     then
         ib_sample_url=${ib_file_url}
-    elif [ "${ib_name}" = "Idol Complex" ]
+    elif [[ "${ib_name}" = "Idol Complex" ]]
     then
         ib_sample_url="https:${ib_sample_url}"
     fi
 
-    if [ -z "${ib_preview_url}" ] || [ "${ib_preview_url}" = "null" ]
+    if [[ -z "${ib_preview_url}" || "${ib_preview_url}" = "null" ]]
     then
         ib_preview_url=${ib_error_url}
-    elif [ "${ib_name}" = "Idol Complex" ] || [ "${ib_name}" = "Sankaku Channel" ]
+    elif [[ "${ib_name}" = "Idol Complex" || "${ib_name}" = "Sankaku Channel" ]]
     then
         ib_preview_url="${ib_sample_url}"
     fi
 
-    if [ -n "${ib_width}" ] && [ "${ib_width}" != "null" ] && [ ${ib_width} -gt 0 ]
+    if [[ -n "${ib_width}" && "${ib_width}" != "null" && ${ib_width} -gt 0 ]]
     then
         ib_resolution_text="${ib_width}x${ib_height}"
     fi
 
-    if [ -n "${ib_type}" ]
+    if [[ -n "${ib_type}" ]]
     then
         ib_type_text="$(printf "%s" "${ib_type}" | tr '[:lower:]' '[:upper:]')"
     fi
@@ -46,15 +46,15 @@ then
             ib_type="photo"
         ;;
         (gif)
-            . "${units}/ib_preview.sh"
+            . "${units}/ib_preview.zsh"
             ib_type="gif"
         ;;
         (mp4)
-            . "${units}/ib_preview.sh"
+            . "${units}/ib_preview.zsh"
             ib_type="video"
         ;;
         (zip | webm)
-            . "${units}/ib_sample.sh"
+            . "${units}/ib_sample.zsh"
         ;;
         (*)
             ib_sample_url="${ib_error_url}"
@@ -74,30 +74,30 @@ else
     ib_type="photo"
 fi
 
-if [ -n "${ib_file_size}" ] && [ "${ib_file_size}" != "null" ] && [ ${ib_file_size} -gt 0 ]
+if [[ -n "${ib_file_size}" && "${ib_file_size}" != "null" && ${ib_file_size} -gt 0 ]]
 then
-    if [ ${ib_file_size} -gt 20971520 ] && [ "${ib_sample_url}" = "${ib_file_url}" ]
+    if [[ ${ib_file_size} -gt 20971520 && "${ib_sample_url}" = "${ib_file_url}" ]]
     then
-        . "${units}/ib_sample.sh"
+        . "${units}/ib_sample.zsh"
     fi
 
     unit_offset=0
-    size_offset=1
+    size_offset=1.0
 
     for unit in B KiB MiB GiB TiB PiB
     do
         unit_offset=${size_offset}
         size_offset=$((size_offset * 1024))
 
-        if [ ${ib_file_size} -lt ${size_offset} ]
+        if [[ ${ib_file_size} -lt ${size_offset} ]]
         then
             break
         fi
     done
 
-    if [ ${ib_file_size} -ge 1024 ]
+    if [[ ${ib_file_size} -ge 1024 ]]
     then
-        ib_size_text="$(printf "%.2f %s" "$(printf "%s" "${ib_file_size} / ${unit_offset}" | bc -l)" "${unit}")"
+        ib_size_text="$(printf "%.2f %s" "$((ib_file_size / unit_offset))" "${unit}")"
     else
         ib_size_text="$(printf "%u %s" "${ib_file_size}" "${unit}")"
     fi
diff --git a/units/ib_name.sh b/units/ib_name.zsh
index cd5f180..c6a0e16 100644
--- a/units/ib_name.sh
+++ b/units/ib_name.zsh
@@ -4,31 +4,31 @@
 
 board_table="a d g i k s y"
 
-if [ -z "${1}" ]
+if [[ -z "${1}" ]]
 then
     reply_text="$(jq -r '.message.reply_to_message.text' "${update}")"
 
-    if [ "${reply_text}" = "null" ]
+    if [[ "${reply_text}" = "null" ]]
     then
         reply_text="$(jq -r '.message.reply_to_message.caption' "${update}")"
     fi
 
-    if [ "${reply_text}" != "null" ]
+    if [[ "${reply_text}" != "null" ]]
     then
         ib_reply_name="$(printf "%s" "${reply_text}" | sed '1!d')"
         ib_post_id="$(printf "%s" "${reply_text}" | grep 'ID' | parameter 2)"
 
         for ib_board in ${board_table}
         do
-            . "${units}/ib_config.sh"
+            . "${units}/ib_config.zsh"
 
-            if [ "${ib_reply_name}" = "${ib_name}" ]
+            if [[ "${ib_reply_name}" = "${ib_name}" ]]
             then
                 break
             fi
         done
 
-        if [ "${ib_name}" = "Idol Complex" ] && echo "${reply_text}" | grep -q 'MD5'
+        if [[ "${ib_name}" = "Idol Complex" ]] && echo "${reply_text}" | grep -q 'MD5'
         then
             ib_post_id="$(printf "%s" "${reply_text}" | grep 'MD5' | parameter 2)"
         fi
diff --git a/units/ib_original.sh b/units/ib_original.zsh
index 1f2fbf1..6229bba 100644
--- a/units/ib_original.sh
+++ b/units/ib_original.zsh
@@ -5,19 +5,19 @@
 ib_file_size="$(jq -r ".${ib_iarray}[0].${ib_isize}" "${ib_file}")"
 ib_file_url="$(jq -r ".${ib_iarray}[0].${ib_ifile}" "${ib_file}")"
 
-. "${units}/ib_size.sh"
+. "${units}/ib_size.zsh"
 
-if [ -n "${ib_file_url}" ] && [ "${ib_file_url}" != "null" ]
+if [[ -n "${ib_file_url}" && "${ib_file_url}" != "null" ]]
 then
-    . "${units}/ib_meta.sh"
+    . "${units}/ib_meta.zsh"
 else
     output_text="No original file found"
     return 0
 fi
 
-if [ -n "${ib_file_size}" ] && [ "${ib_file_size}" != "null" ] && [ ${ib_file_size} -gt 0 ]
+if [[ -n "${ib_file_size}" && "${ib_file_size}" != "null" && ${ib_file_size} -gt 0 ]]
 then
-    if [ ${ib_file_size} -gt 20971520 ]
+    if [[ ${ib_file_size} -gt 20971520 ]]
     then
         output_text="File size is too large"
     fi
diff --git a/units/ib_post.sh b/units/ib_post.zsh
index af85126..ad8a5a0 100644
--- a/units/ib_post.sh
+++ b/units/ib_post.zsh
@@ -11,81 +11,72 @@ ib_parent_id="$(jq -r ".${ib_iarray}[0].${ib_iparent}" "${ib_file}")"
 ib_has_children="$(jq -r ".${ib_iarray}[0].${ib_ichildren}" "${ib_file}")"
 ib_md5="$(jq -r ".${ib_iarray}[0].${ib_imd5}" "${ib_file}")"
 ib_source="$(jq -r ".${ib_iarray}[0].${ib_isource}" "${ib_file}" | htmlescape)"
-ib_tags="$(jq -r ".${ib_iarray}[0].${ib_itags}" "${ib_file}")"
-ib_tags_count=0
+ib_tags=($(jq -r ".${ib_iarray}[0].${ib_itags}" "${ib_file}"))
 
-. "${units}/ib_date.sh"
-. "${units}/ib_size.sh"
-. "${units}/ib_meta.sh"
+. "${units}/ib_date.zsh"
+. "${units}/ib_size.zsh"
+. "${units}/ib_meta.zsh"
 
 output_text="$(printf "<b>%s</b>\n<b>ID:</b> <code>%s</code>" "${ib_name}" "${ib_id}")"
 
-if [ -n "${ib_date_text}" ]
+if [[ -n "${ib_date_text}" ]]
 then
     output_text="$(printf "%s\n<b>Date:</b> <code>%s</code>" "${output_text}" "${ib_date_text}")"
 fi
 
-if [ -n "${ib_resolution_text}" ]
+if [[ -n "${ib_resolution_text}" ]]
 then
     output_text="$(printf "%s\n<b>Resolution:</b> %s" "${output_text}" "${ib_resolution_text}")"
 fi
 
-if [ -n "${ib_size_text}" ]
+if [[ -n "${ib_size_text}" ]]
 then
     output_text="$(printf "%s\n<b>Size:</b> %s" "${output_text}" "${ib_size_text}")"
 fi
 
-if [ -n "${ib_type_text}" ]
+if [[ -n "${ib_type_text}" ]]
 then
     output_text="$(printf "%s\n<b>Type:</b> %s" "${output_text}" "${ib_type_text}")"
 fi
 
-if [ -n "${ib_rating}" ] && [ "${ib_rating}" != "null" ]
+if [[ -n "${ib_rating}" && "${ib_rating}" != "null" ]]
 then
-    set -- ${ib_ratings}
-
-    while [ ${#} -ge 2 ]
+    while [[ ${#ib_ratings} -ge 2 ]]
     do
-        if [ "${ib_rating}" = "${1}" ]
+        if [[ "${ib_rating}" = "${ib_ratings[1]}" ]]
         then
-            output_text="$(printf "%s\n<b>Rating:</b> <code>%s</code>" "${output_text}" "${2}")"
+            output_text="$(printf "%s\n<b>Rating:</b> <code>%s</code>" "${output_text}" "${ib_ratings[2]}")"
             break
         else
-            shift 2
+            ib_ratings=(${ib_ratings[@]:2})
         fi
     done
 fi
 
-if [ -n "${ib_parent_id}" ] && [ "${ib_parent_id}" != "null" ] && [ "${ib_parent_id}" != "0" ]
+if [[ -n "${ib_parent_id}" && "${ib_parent_id}" != "null" && "${ib_parent_id}" != "0" ]]
 then
     output_text="$(printf "%s\n<b>Parent ID:</b> <code>%s</code>" "${output_text}" "${ib_parent_id}")"
 fi
 
-if [ "${ib_has_children}" = "true" ]
+if [[ "${ib_has_children}" = "true" ]]
 then
     output_text="$(printf "%s\n<b>Has children:</b> yes" "${output_text}")"
 fi
 
-if [ -n "${ib_md5}" ] && [ "${ib_md5}" != "null" ]
+if [[ -n "${ib_md5}" && "${ib_md5}" != "null" ]]
 then
     output_text="$(printf "%s\n<b>MD5:</b> <code>%s</code>" "${output_text}" "${ib_md5}")"
 fi
 
-if [ -n "${ib_source}" ] && [ "${ib_source}" != "null" ]
+if [[ -n "${ib_source}" && "${ib_source}" != "null" ]]
 then
     if echo "${ib_source}" | grep -q -e "pixiv" -e "pximg"
     then
         ib_source="https://www.pixiv.net/artworks/$(printf "%s" "${ib_source##*/}" | cut -d '_' -f 1)"
     fi
 
-    if [ ${#ib_source} -le 2048 ]
+    if [[ ${#ib_source} -le 2048 ]]
     then
         output_text="$(printf "%s\n<b>Source:</b> %s" "${output_text}" "${ib_source}")"
     fi
 fi
-
-if [ -n "${ib_tags}" ] && [ "${ib_tags}" != "null" ]
-then
-    set -- ${ib_tags}
-    ib_tags_count=${#}
-fi
diff --git a/units/ib_preview.sh b/units/ib_preview.zsh
index b44a54c..ab70e87 100644
--- a/units/ib_preview.sh
+++ b/units/ib_preview.zsh
@@ -2,7 +2,7 @@
 # Copyright (C) 2024-2025 Danil Lisin
 # SPDX-License-Identifier: Apache-2.0
 
-if [ "${ib_preview_url}" = "${ib_sample_url}" ]
+if [[ "${ib_preview_url}" = "${ib_sample_url}" ]]
 then
     ib_preview_url="${ib_error_url}"
     ib_width="${ib_error_width}"
diff --git a/units/ib_sample.sh b/units/ib_sample.zsh
index 4e4ee94..4dede5c 100644
--- a/units/ib_sample.sh
+++ b/units/ib_sample.zsh
@@ -2,7 +2,7 @@
 # Copyright (C) 2024-2025 Danil Lisin
 # SPDX-License-Identifier: Apache-2.0
 
-if [ "${ib_preview_url}" = "${ib_sample_url}" ]
+if [[ "${ib_preview_url}" = "${ib_sample_url}" ]]
 then
     ib_preview_url="${ib_error_url}"
     ib_width="${ib_error_width}"
diff --git a/units/ib_search.sh b/units/ib_search.zsh
index 9013e2f..075da44 100644
--- a/units/ib_search.sh
+++ b/units/ib_search.zsh
@@ -2,14 +2,14 @@
 # Copyright (C) 2024-2025 Danil Lisin
 # SPDX-License-Identifier: Apache-2.0
 
-if [ -n "${1}" ]
+if [[ -n "${1}" ]]
 then
     ib_board="${1}"
 
-    . "${units}/ib_config.sh"
-    . "${units}/ib_authconfig.sh"
+    . "${units}/ib_config.zsh"
+    . "${units}/ib_authconfig.zsh"
 
-    if [ -z "${ib_data_url}" ]
+    if [[ -z "${ib_data_url}" ]]
     then
         output_title="Invalid arguments"
         output_text="Unsupported image board"
@@ -34,43 +34,29 @@ else
     set -- -a ${@}
 fi
 
-if [ -n "${offset}" ]
+if [[ -n "${offset}" ]]
 then
     inline_page=${offset}
 fi
 
-if [ -n "${1}" ]
+if [[ -n "${1}" ]]
 then
     inline_query="${@}"
 
-    while getopts ${inline_options} inline_getopts
-    do
-        case "${inline_getopts}" in
-            (a)
-                ib_autopaging=0
-            ;;
-            (m)
-                ib_metadata=0
-            ;;
-            (p)
-                ib_preview=0
-            ;;
-            (q)
-                ib_quick=0
-            ;;
-            (*)
-                output_title="Invalid arguments"
-                output_text="Unsupported options"
-
-                return 0
-            ;;
-        esac
-    done
+    if ! zparseopts -D -F -K -- \
+        a=ib_autopaging \
+        m=ib_metadata \
+        p=ib_preview \
+        q=ib_quick
+    then
+        output_title="Invalid arguments"
+        output_text="Unsupported options"
 
-    shift $((OPTIND - 1))
+        return 0
+    fi
 fi
 
-if [ -n "${1}" ]
+if [[ -n "${1}" ]]
 then
     ib_query="${@}"
     shift ${#}
@@ -79,10 +65,10 @@ fi
 ib_limit=${inline_limit}
 ib_page=${inline_page}
 
-if [ -n "${ib_iwildcard}" ]
+if [[ -n "${ib_iwildcard}" ]]
 then
     ib_query="$(printf "%s" "${ib_query}" | sed "s/${ib_iwildcard}/\\\\${ib_iwildcard}/g" | tr '*' "${ib_iwildcard}")"
 fi
 
 ib_hash="$(printf "%s%s%s%s%s" "${user_id}" "${ib_mode}" "${ib_board}" "${ib_page}" "${ib_query}" | enhash)"
-. "${units}/ib_file.sh"
+. "${units}/ib_file.zsh"
diff --git a/units/ib_size.sh b/units/ib_size.zsh
index 9859e95..c9ef020 100644
--- a/units/ib_size.sh
+++ b/units/ib_size.zsh
@@ -2,12 +2,12 @@
 # Copyright (C) 2024-2025 Danil Lisin
 # SPDX-License-Identifier: Apache-2.0
 
-if [ -n "${ib_file_size}" ] && [ "${ib_file_size}" != "null" ]
+if [[ -n "${ib_file_size}" && "${ib_file_size}" != "null" ]]
 then
     return 0
 fi
 
-if [ -z "${ib_file_url}" ] || [ "${ib_file_url}" = "null" ]
+if [[ -z "${ib_file_url}" || "${ib_file_url}" = "null" ]]
 then
     return 0
 fi
diff --git a/units/ib_token.sh b/units/ib_token.zsh
index 03f2abd..e5d3c14 100644
--- a/units/ib_token.sh
+++ b/units/ib_token.zsh
@@ -7,19 +7,19 @@ do
     sleep 1
 done
 
-if [ -f "${user_config}/${ib_config}/legacy" ]
+if [[ -f "${user_config}/${ib_config}/legacy" ]]
 then
     . "${user_config}/${ib_config}/legacy"
 fi
 
-if [ -f "${user_config}/${ib_config}/timestamp" ]
+if [[ -f "${user_config}/${ib_config}/timestamp" ]]
 then
     ib_ctime=$(date +%s)
     ib_mtime=$(cat "${user_config}/${ib_config}/timestamp")
 
-    if [ $((ib_ctime - ib_mtime)) -gt ${ib_expire} ]
+    if [[ $((ib_ctime - ib_mtime)) -gt ${ib_expire} ]]
     then
-        if [ -n "${ib_lock}" ]
+        if [[ -n "${ib_lock}" ]]
         then
             . "${units}/ib_lock.sh" &
 
@@ -27,12 +27,12 @@ then
             output_text="Try again in a few seconds"
             notification_text="${output_title} ${output_text}"
         else
-            . "${units}/ib_auth.sh"
+            . "${units}/ib_auth.zsh"
         fi
     fi
 fi
 
-if [ -f "${user_config}/${ib_config}/token" ]
+if [[ -f "${user_config}/${ib_config}/token" ]]
 then
     ib_header="${ib_authorization} $(cat "${user_config}/${ib_config}/token")"
 fi
diff --git a/units/log.sh b/units/log.zsh
index 145b82f..2e5b972 100644
--- a/units/log.sh
+++ b/units/log.zsh
@@ -2,7 +2,7 @@
 # Copyright (C) 2024-2025 Danil Lisin
 # SPDX-License-Identifier: Apache-2.0
 
-if [ -n "${no_logs}" ]
+if [[ -n "${no_logs}" ]]
 then
     return 0
 fi
diff --git a/units/shorts_search.sh b/units/shorts_search.sh
deleted file mode 100644
index 427c935..0000000
--- a/units/shorts_search.sh
+++ /dev/null
@@ -1,110 +0,0 @@
-# Copyright (C) 2024-2025 Maria Lisina
-# Copyright (C) 2024-2025 Danil Lisin
-# SPDX-License-Identifier: Apache-2.0
-
-if test "${1}" -gt 0
-then
-    inline_page=${1}
-    shift
-else
-    inline_page=1
-    set -- -a ${@}
-fi
-
-if [ -n "${offset}" ]
-then
-    inline_page=${offset}
-fi
-
-if [ -n "${1}" ]
-then
-    inline_query="${@}"
-
-    while getopts "aqrw" inline_getopts
-    do
-        case "${inline_getopts}" in
-            (a)
-                shorts_autopaging=0
-            ;;
-            (q)
-                shorts_quick=0
-            ;;
-            (r)
-                shorts_reverse=0
-            ;;
-            (w)
-                shorts_word=0
-            ;;
-            (*)
-                output_title="Invalid arguments"
-                output_text="Unsupported options"
-
-                return 0
-            ;;
-        esac
-    done
-
-    shift $((OPTIND - 1))
-fi
-
-if [ -n "${1}" ]
-then
-    shorts_query="${@}"
-    shift ${#}
-fi
-
-if [ -d "${short_config}" ]
-then
-    if [ -n "${shorts_reverse}" ]
-    then
-        shorts_ls="-xtr"
-    else
-        shorts_ls="-xt"
-    fi
-
-    shorts="$(ls ${shorts_ls} "${short_config}")"
-fi
-
-set -- ${shorts}
-
-if [ ${#} -eq 0 ]
-then
-    output_title="No shortcuts found"
-    output_text="You have no saved shortcuts yet"
-
-    return 0
-fi
-
-if [ -n "${shorts_query}" ]
-then
-    if [ -n "${shorts_word}" ]
-    then
-        shorts_grep="-lqwFe"
-    else
-        shorts_grep="-lqiFe"
-    fi
-
-    for short in ${@}
-    do
-        if grep ${shorts_grep} "${shorts_query}" "${short_config}/${short}"
-        then
-            query_shorts="${query_shorts} ${short}"
-        fi
-    done
-
-    set -- ${query_shorts}
-fi
-
-if [ ${#} -ge $(((inline_page - 1) * inline_limit + 1)) ]
-then
-    shift $(((inline_page - 1) * inline_limit))
-else
-    if [ -n "${offset}" ]
-    then
-        output_title="End of results"
-    else
-        output_title="No results found"
-    fi
-
-    output_text="Try different page or query"
-fi
diff --git a/units/shorts_search.zsh b/units/shorts_search.zsh
new file mode 100644
index 0000000..9d98d34
--- /dev/null
+++ b/units/shorts_search.zsh
@@ -0,0 +1,94 @@
+# Copyright (C) 2024-2025 Maria Lisina
+# Copyright (C) 2024-2025 Danil Lisin
+# SPDX-License-Identifier: Apache-2.0
+
+if test "${1}" -gt 0
+then
+    inline_page=${1}
+    shift
+else
+    inline_page=1
+    set -- -a ${@}
+fi
+
+if [[ -n "${offset}" ]]
+then
+    inline_page=${offset}
+fi
+
+if [[ -n "${1}" ]]
+then
+    inline_query="${@}"
+
+    if ! zparseopts -D -F -K -- \
+        a=shorts_autopaging \
+        q=shorts_quick \
+        r=shorts_reverse \
+        w=shorts_word
+    then
+        output_title="Invalid arguments"
+        output_text="Unsupported options"
+
+        return 0
+    fi
+fi
+
+if [[ -n "${1}" ]]
+then
+    shorts_query="${@}"
+    shift ${#}
+fi
+
+if [[ -d "${short_config}" ]]
+then
+    if [[ -n "${shorts_reverse}" ]]
+    then
+        shorts_ls="-xtr"
+    else
+        shorts_ls="-xt"
+    fi
+
+    shorts=($(ls ${shorts_ls} "${short_config}"))
+fi
+
+if [[ ${#shorts} -eq 0 ]]
+then
+    output_title="No shortcuts found"
+    output_text="You have no saved shortcuts yet"
+
+    return 0
+fi
+
+if [[ -n "${shorts_query}" ]]
+then
+    if [[ -n "${shorts_word}" ]]
+    then
+        shorts_grep="-lqwFe"
+    else
+        shorts_grep="-lqiFe"
+    fi
+
+    for short in ${shorts[@]}
+    do
+        if grep ${shorts_grep} "${shorts_query}" "${short_config}/${short}"
+        then
+            query_shorts=(${query_shorts[@]} ${short})
+        fi
+    done
+
+    shorts=(${query_shorts[@]})
+fi
+
+if [[ ${#shorts} -ge $(((inline_page - 1) * inline_limit + 1)) ]]
+then
+    shorts=(${shorts[@]:$(((inline_page - 1) * inline_limit))})
+else
+    if [[ -n "${offset}" ]]
+    then
+        output_title="End of results"
+    else
+        output_title="No results found"
+    fi
+
+    output_text="Try different page or query"
+fi
diff --git a/units/sn_auth.sh b/units/sn_auth.zsh
index 8bf8fc3..e441224 100644
--- a/units/sn_auth.sh
+++ b/units/sn_auth.zsh
@@ -2,10 +2,10 @@
 # Copyright (C) 2024-2025 Danil Lisin
 # SPDX-License-Identifier: Apache-2.0
 
-if [ -n "${1}" ]
+if [[ -n "${1}" ]]
 then
     sn_key="${1}"
-elif [ -f "${user_config}/saucenao" ]
+elif [[ -f "${user_config}/saucenao" ]]
 then
     sn_key="$(cat "${user_config}/saucenao")"
     return 0
@@ -30,8 +30,8 @@ then
     output_text="Failed to process request"
     log_text="sn_auth (${update_id}): ${output_text}"
 
-    . "${units}/log.sh"
-    . "${units}/dump.sh"
+    . "${units}/log.zsh"
+    . "${units}/dump.zsh"
 
     return 0
 fi
@@ -41,19 +41,19 @@ then
     output_text="An unknown error occurred"
     log_text="sn_auth (${update_id}): ${output_text}"
 
-    . "${units}/log.sh"
-    . "${units}/dump.sh"
+    . "${units}/log.zsh"
+    . "${units}/dump.zsh"
 
     return 0
 fi
 
-if [ "$(jq -r '.header.user_id' "${sn_file}")" = "null" ]
+if [[ "$(jq -r '.header.user_id' "${sn_file}")" = "null" ]]
 then
     output_text="Invalid API Key"
     log_text="sn_auth (${update_id}): ${output_text}"
 
-    . "${units}/log.sh"
-    . "${units}/dump.sh"
+    . "${units}/log.zsh"
+    . "${units}/dump.zsh"
 
     return 0
 fi
diff --git a/units/sn_get.sh b/units/sn_get.zsh
index 0adb1f7..d47658a 100644
--- a/units/sn_get.sh
+++ b/units/sn_get.zsh
@@ -5,13 +5,13 @@
 message_id="$(jq -r '.message.reply_to_message.message_id' "${update}")"
 file_id="$(jq -r '.message.reply_to_message.photo.[1].file_id' "${update}")"
 
-if [ "${message_id}" = "null" ] || [ "${message_id}" = "${message_thread_id}" ]
+if [[ "${message_id}" = "null" || "${message_id}" = "${message_thread_id}" ]]
 then
     output_text="You must use this command in reply to an image"
     return 0
 fi
 
-if [ "${file_id}" = "null" ]
+if [[ "${file_id}" = "null" ]]
 then
     output_text="Could not find an image in replied message"
     return 0
@@ -32,8 +32,8 @@ then
     output_text="Failed to get the image file"
     log_text="getFile (${update_id}): Failed to access Telegram Bot API"
 
-    . "${units}/log.sh"
-    . "${units}/dump.sh"
+    . "${units}/log.zsh"
+    . "${units}/dump.zsh"
 
     return 0
 fi
@@ -43,42 +43,42 @@ then
     output_text="An unknown error occurred"
     log_text="getFile (${update_id}): An unknown error occurred"
 
-    . "${units}/log.sh"
-    . "${units}/dump.sh"
+    . "${units}/log.zsh"
+    . "${units}/dump.zsh"
 
     return 0
 fi
 
-if [ "$(jq -r '.ok' "${output_file}")" != "true" ]
+if [[ "$(jq -r '.ok' "${output_file}")" != "true" ]]
 then
     output_text="Failed to get the image file"
     error_description="$(jq -r '.description' "${output_file}")"
 
-    if [ "${error_description}" != "null" ]
+    if [[ "${error_description}" != "null" ]]
     then
         log_text="getFile (${update_id}): ${error_description}"
     else
         log_text="getFile (${update_id}): An unknown error occurred"
     fi
 
-    . "${units}/log.sh"
-    . "${units}/dump.sh"
+    . "${units}/log.zsh"
+    . "${units}/dump.zsh"
 
     return 0
 fi
 
 file_path="$(jq -r '.result.file_path' "${output_file}")"
 
-if [ "${api_address}" = "${local_address}" ] && ! ls "${file_path}" > /dev/null
+if [[ "${api_address}" = "${local_address}" ]] && ! ls "${file_path}" > /dev/null
 then
     output_text="There is an error on the bot side, please contact bot deployer"
     log_text="Error: sn_get: Cannot access Telegram Bot API working directory"
 
-    . "${units}/log.sh"
+    . "${units}/log.zsh"
     return 0
 fi
 
-if [ "${api_address}" = "${default_address}" ]
+if [[ "${api_address}" = "${default_address}" ]]
 then
     output_file="${cache}/${update_id}_file.jpg"
     dump="${dump} ${output_file##*/}"
@@ -93,26 +93,26 @@ then
         output_text="Failed to download the image file"
         log_text="getFile (${update_id}): Failed to access Telegram Bot API"
 
-        . "${units}/log.sh"
-        . "${units}/dump.sh"
+        . "${units}/log.zsh"
+        . "${units}/dump.zsh"
 
         return 0
     fi
 
-    if [ "$(jq -r '.ok' "${output_file}")" = "false" ]
+    if [[ "$(jq -r '.ok' "${output_file}")" = "false" ]]
     then
         output_text="Failed to download the image file"
         error_description="$(jq -r '.description' "${output_file}")"
 
-        if [ "${error_description}" != "null" ]
+        if [[ "${error_description}" != "null" ]]
         then
             log_text="getFile (${update_id}): ${error_description}"
         else
             log_text="getFile (${update_id}): An unknown error occurred"
         fi
 
-        . "${units}/log.sh"
-        . "${units}/dump.sh"
+        . "${units}/log.zsh"
+        . "${units}/dump.zsh"
 
         return 0
     fi
@@ -121,4 +121,4 @@ then
 fi
 
 sn_query="file=@${file_path}"
-. "${units}/sn_search.sh"
+. "${units}/sn_search.zsh"
diff --git a/units/sn_search.sh b/units/sn_search.zsh
index bfdd047..2c6bd45 100644
--- a/units/sn_search.sh
+++ b/units/sn_search.zsh
@@ -26,8 +26,8 @@ then
     output_text="Failed to process request"
     log_text="sn_search (${update_id}): ${output_text}"
 
-    . "${units}/log.sh"
-    . "${units}/dump.sh"
+    . "${units}/log.zsh"
+    . "${units}/dump.zsh"
 
     return 0
 fi
@@ -37,17 +37,17 @@ then
     output_text="An unknown error occurred"
     log_text="sn_search (${update_id}): ${output_text}"
 
-    . "${units}/log.sh"
-    . "${units}/dump.sh"
+    . "${units}/log.zsh"
+    . "${units}/dump.zsh"
 
     return 0
 fi
 
-if [ "$(jq -r '.header.status' "${sn_file}")" != "0" ]
+if [[ "$(jq -r '.header.status' "${sn_file}")" != "0" ]]
 then
     output_text="Error: <code>$(jq -r '.header.message' "${sn_file}" | htmlescape)</code>"
     log_text="sn_search (${update_id}): $(jq -r '.header.message' "${sn_file}")"
 
-    . "${units}/log.sh"
-    . "${units}/dump.sh"
+    . "${units}/log.zsh"
+    . "${units}/dump.zsh"
 fi
diff --git a/units/user.sh b/units/user.sh
deleted file mode 100644
index 69c7dd7..0000000
--- a/units/user.sh
+++ /dev/null
@@ -1,27 +0,0 @@
-# Copyright (C) 2024-2025 Maria Lisina
-# Copyright (C) 2024-2025 Danil Lisin
-# SPDX-License-Identifier: Apache-2.0
-
-aliases="${files}/aliases.txt"
-blacklist="${files}/blacklist.txt"
-whitelist="${files}/whitelist.txt"
-
-positional_parameters="${@}"
-
-if [ -s "${aliases}" ] && alias="$(grep -x "${user_id} .*" "${aliases}")"
-then
-    user_id="$(printf "%s" "${alias}" | parameter 2)"
-fi
-
-if [ -s "${blacklist}" ] && grep -qx "${user_id}" "${blacklist}"
-then
-    exit 0
-fi
-
-if [ -s "${whitelist}" ] && ! grep -qx "${user_id}" "${whitelist}"
-then
-    exit 0
-fi
-
-user_config="${config}/${user_id}"
-set -- ${positional_parameters}
diff --git a/units/user.zsh b/units/user.zsh
new file mode 100644
index 0000000..f861301
--- /dev/null
+++ b/units/user.zsh
@@ -0,0 +1,24 @@
+# Copyright (C) 2024-2025 Maria Lisina
+# Copyright (C) 2024-2025 Danil Lisin
+# SPDX-License-Identifier: Apache-2.0
+
+aliases_file="${files}/aliases.txt"
+blacklist_file="${files}/blacklist.txt"
+whitelist_file="${files}/whitelist.txt"
+
+if [[ -s "${aliases_file}" ]] && alias="$(grep -x "${user_id} .*" "${aliases_file}")"
+then
+    user_id="$(printf "%s" "${alias}" | parameter 2)"
+fi
+
+if [[ -s "${blacklist_file}" ]] && grep -qx "${user_id}" "${blacklist_file}"
+then
+    exit 0
+fi
+
+if [[ -s "${whitelist_file}" ]] && ! grep -qx "${user_id}" "${whitelist_file}"
+then
+    exit 0
+fi
+
+user_config="${config}/${user_id}"