initial commit

bashbot-lib.sh

@@ -0,0 +1,145 @@
+#!/bin/bash
+
+# this is just a library
+# you will need to provide the following in the implementation:
+# 1. the api url with it's corresponding token as
+#    api_url="api.telegram.org/bot[insert your api token]/"
+#    pay attention to the trailing forward slash
+# 2. the bot id as
+#    bot_id="[insert your bot_id]"
+# 3. the following files to read and write from
+#    updates.txt
+#    sentmessages.txt
+#    callbacks.txt
+#    pay attention to the trailing forward slash
+# 4. (optional) a directory for the bot's files as
+#    bot_tmpdir="/some/path/"
+#    pay attention to the trailing forward slash
+# IMPORTANT: this library is not asynchronous, only one message
+#            is read at a time and is done so in order
+# IMPORTANT: this library uses the getUpdates method with
+#            tcp_keepalive,NOT webhooks
+
+calc_offset() {
+  local current="$(bc -l <<< "$(tail -n 1 "${bot_tmpdir}updates.txt" | \
+                   grep -om1 "\"update_id\":[0-9]\+" | \
+                   grep -om1 "[0-9]\+") + 1" 2>/dev/null)"
+  [ ! -z "${current}" ] && printf "%d" "${current}"
+}
+
+getupd() {
+  local offset="$(calc_offset)"
+  local update="$(curl -sX GET --keepalive-time 300 "${api_url}getUpdates" -d "offset=${offset}" \
+   -d "limit=1" -d "timeout=300"\
+   | sed 's/{"ok":true,"result":\[\]}\|^{"ok":false.*\|^{"ok":true,"result":\[{\?//g;:a;N;$!ba;s/\n//g;s/}\]}$//g;')"
+  printf "%s" ${update}
+  [ ! -z "${update}" ] && printf "%s\n" "${update}" >> "${bot_tmpdir}updates.txt"
+}
+
+getmsg_id() {
+  tail -n1 "${bot_tmpdir}updates.txt" | grep -om1\
+  "\"message\":{\"message_id\":[0-9]\+" | grep -om1 "[0-9]\+"
+}
+
+getusr_id() {
+  tail -n1 "${bot_tmpdir}updates.txt" | grep -om1\
+   "\"from\":{\"id\":[0-9]\+" | grep -om1 "[0-9]\+"
+}
+
+getchat_id() {
+  tail -n1 "${bot_tmpdir}updates.txt" | grep -om1\
+   "\"chat\":{\"id\":-\?[0-9]\+" | grep -om1 "\-\?[0-9]\+"
+}
+
+utf-16-surrogate-pair-decode() {
+  # shamelessly stolen from stackoverflow
+  local out="$1"
+  local remain=""
+  local regexp='(.*)\\u[dD]([0-9a-fA-F]{3})\\u[dD]([0-9a-fA-F]{3})(.*)'
+  while [[ "${out}" =~ $regexp ]] ; do
+   # match 2 \udxxx hex values, calculate new U, then split and replace
+   local W1="$(( ( 0xd${BASH_REMATCH[2]} & 0x3ff) <<10 ))"
+   local W2="$(( 0xd${BASH_REMATCH[3]} & 0x3ff ))"
+   U="$(( ( W1 | W2 ) + 0x10000 ))"
+   remain="$(printf '\\U%8.8x' "${U}")${BASH_REMATCH[4]}${remain}"
+   out="${BASH_REMATCH[1]}"
+  done
+  echo -e "${out}${remain}"
+}
+
+gettext() {
+  local text="$(tail -n 1 "${bot_tmpdir}updates.txt" | grep -om1\
+   '\("text"\|"caption"\):"\(\\"\|[^"]*\)*"\(,\|}\)' | tail -n1)"
+  grep "^\"text\"" <<< "${text}" >/dev/null && utf-16-surrogate-pair-decode "${text:8:-2}"\
+  || {
+    grep "^\"caption\"" <<< "${text}" >/dev/null && utf-16-surrogate-pair-decode "${text:11:-2}"
+  }
+}
+
+getusr_name(){
+  local user_name="$(tail -n 1 "${bot_tmpdir}updates.txt" | grep -om1\
+   '"first_name":"\(\\"\|[^"]*\)*",\("username"\|"language_code"\)' | head -n1)"
+  grep "\"username\"$" <<< "${user_name}" >/dev/null && utf-16-surrogate-pair-decode "${user_name:14:-12}"\
+  || {
+    grep "\"language_code\"$" <<< "${user_name}" >/dev/null && utf-16-surrogate-pair-decode "${user_name:14:-17}"
+  }
+}
+
+getusrname(){
+  local username="$(tail -n 1 "${bot_tmpdir}updates.txt" | grep -om1\
+   '"username":"\(\\"\|[^"]*\)*","language_code"' | head -n1)"
+  utf-16-surrogate-pair-decode "${username:12:-17}"
+}
+
+getchat_title(){
+  local chat_title="$(tail -n 1 "${bot_tmpdir}updates.txt" | grep -om1\
+   '"title":"\(\\"\|[^"]*\)*","type":"group"' | head -n1)"
+  [ ! -z "${chat_title}" ] && utf-16-surrogate-pair-decode "${chat_title:9:-16}"\
+  || getusr_name
+}
+
+get_cbks() {
+  local callbacks="$(tail -n 1 "${bot_tmpdir}updates.txt"\
+   | grep "\"callback_query\"" | grep "\"callback_data\":\"recheck\"")"
+   [ ! -z "${callbacks}" ] && is_callback=0 && printf "%s\n" "${callbacks}"\
+   >> "${bot_tmpdir}callbacks.txt"
+}
+
+sendmsg() {
+  sentmsg="$(curl -sX GET "${api_url}sendMessage" -d "chat_id=${1}" \
+   -d "text=${2}" \
+   -d 'reply_markup={"inline_keyboard":[[{"text":"check again","callback_data":"recheck"}]]}')" \
+   && [ ! -z "${sentmsg}" ] && printf "%s\n" "${sentmsg}"\
+   | sed 's/^{"ok":false.*\|^{"ok":true,"result":{\|}$//g'\
+   >> "${bot_tmpdir}sentmsgs.txt"
+}
+
+replymsg() {
+  sentmsg="$(curl -sX GET "${api_url}sendMessage" -d "chat_id=${curmsg[chat_id]}" -d "reply_to_message_id=${curmsg[message_id]}" \
+   -d "text=${curmsg[text]}" \
+   && [ ! -z "${sentmsg}" ] && printf "%s\n" "${sentmsg}"\
+   | sed 's/^{"ok":false.*\|^{"ok":true,"result":{\|}$//g'\
+   >> "${bot_tmpdir}sentmsgs.txt"
+}
+
+# TODO
+#editmsg() {
+#  curl -sX GET "${api_url}editMessageText" -d "chat_id=${1}" -d "message_id=${2}" \
+#   -d "text=${3}"
+#}
+#
+#delmsg() {
+#  curl -sX GET "${api_url}deleteMessage" -d "chat_id=${1}"\
+#  -d "message_id=${2}"
+#}
+
+getmsg_content(){
+  local -n _REF="${1}"
+  _REF[user_id]="$(getusr_id)"
+  _REF[user_name]="$(getusr_name)"
+  _REF[username]="$(getusrname)"
+  _REF[chat_id]="$(getchat_id)"
+  _REF[chat_title]="$(getchat_title)"
+  _REF[msg_id]="$(getmsg_id)"
+  _REF[text]="$(gettext)"
+}

viewer.sh

@@ -0,0 +1,20 @@
+#!/bin/bash
+
+# this is just a library
+# you will need to provide the following in the implementation:
+# 1. a bash associative array populated by the library's functions
+
+print_dashes(){
+  term_cols="$(tput cols)"
+  for ((i = 0; i < "${term_cols}"; i++)); do
+    printf -- "-"
+  done
+}
+
+view_content(){
+  local -n _REF="${1}"
+  print_dashes; printf "\n"
+  for i in "${!_REF[@]}"; do
+    [ ! -z "${_REF[${i}]}" ] && printf "[%s]  \t=\t%s\n" "${i}" "${_REF[${i}]}"
+  done
+}