From 120514367871640e9e85d15bf3e2a535f880c464 Mon Sep 17 00:00:00 2001
From: Erez Binyamin <exb4096@rit.edu>
Date: Mon, 20 Apr 2020 17:36:07 -0400
Subject: [PATCH] Added :list and :describe and updated :usage/:help

---
 share/adapters/rfc.sh | 49 ++++++++++++++++++++++++++++++-------------
 1 file changed, 34 insertions(+), 15 deletions(-)

diff --git a/share/adapters/rfc.sh b/share/adapters/rfc.sh
index 831a042..4c12b11 100755
--- a/share/adapters/rfc.sh
+++ b/share/adapters/rfc.sh
@@ -8,21 +8,23 @@ RFC_get()
 {
   mkdir -p /tmp/RFC_get
   local WEB_RESP="/tmp/RFC_get/rfc_get_web_resp_${RANDOM}.html"
-  local MIN_RFC=1
-  local MAX_RFC=8650
+  local RFC_INDEX="/tmp/RFC_get/rfc_index.html"
   local isNum='^[0-9]+$'
-  local NEVER_ISSUED=( "3333" "3350" "3399" "3699" "3799" "3800" "3899" "3900" "3907" "3908" "3999" "4000" "4099" "4100" "4199" "4200" "4232" "4299" "4300" "4399" "4400" "4499" "4500" "4599" "4600" "4658" "4699" "4700" "4751" "4799" "4800" "4899" "4900" "4921" "4922" "4989" "4999" "5099" "5100" "5108" "5199" "5200" "5299" "5300" "5312" "5313" "5314" "5315" "5319" "5399" "5400" "5499" "5500" "5599" "5600" "5699" "5700" "5799" "5800" "5809" "5821" "5822" "5823" "5899" "5900" "5999" "6000" "6099" "6100" "6102" "6103" "6199" "6200" "6299" "6300" "6399" "6400" "6499" "6500" "6523" "6524" "6599" "6600" "6634" "6699" "6700" "6799" "6800" "6899" "6900" "6966" "6995" "6999" "7000" "7099" "7327" "7907" "8523" "8524" "8535" "8566" "8626" "8644" "8646" "8647" "8648" )
+  # Update RFC_INDEX if file does not exist
+  [ -f ${RFC_INDEX} ] || curl 'https://www.ietf.org/download/rfc-index.txt' 2>/dev/null > ${RFC_INDEX}
+  local MIN_RFC=1
+  local MAX_RFC=$(sed '/^ / d' ${RFC_INDEX} | tail -n 1 | sed 's/ .*//')
 
   # Syntax check Usage statement
-  if [ $# -lt 1 ] || [[ ${1,,} =~ "-h" ]] || [[ ${1,,} =~ "--help" ]]
+  if [ $# -lt 1 ] || [[ ${1,,} == "-h" ]] || [[ ${1,,} == "--help" ]] || [[ ${1,,} == ":help" ]] || [[ ${1,,} == ":usage" ]]
   then
     printf "
     USAGE:
-      $0 <RFC_number>
-      $0 <Topic_string>
-      $0 :list
-      $0 <-h|--help>
-    "
+      rfc <RFC_number>		Search RFC by number
+      rfc <Topic_string>	Search RFC by topic
+      rfc :list			List available RFC's
+      rfc :usage		Show this help message
+    \n"
     return 0
   fi
   # Get corresponding RFC by number
@@ -71,13 +73,30 @@ RFC_get()
   # Print list of available RFCs
   elif [[ "${1,,}" == ":list" ]]
   then
-    echo "Valid RFC numbers: [ ${MIN_RFC} - ${MAX_RFC} ]"
-    #for i in `seq 1 $MAX_RFC`
-    #do
-    #       echo "${NEVER_ISSUED[@]}" | tr ' ' '\n' | grep -qFx $i || echo $i
-    #done
+    # Format RFC_INDEX to show short description of each RFC
+    sed -ne '/0001/,$p' ${RFC_INDEX} \
+      | tr '\n' '#' \
+      | sed 's/##/\n/g' \
+      | sed 's/#    //g' \
+      | grep -o '.*\. ' \
+      | sed -r 's/^(.*)(January|February|March|April|May|June|July|August|September|October|November|December) [[:digit:]]{4}(.*)$/\1/' \
+      | grep -v 'Not Issued' \
+      | sed 's/ .*//; s/^0*//'
+    printf "\nValid RFC numbers: [ ${MIN_RFC} - ${MAX_RFC} ]\n"
     return 0
-  # Print list of RFCs related to keyword:   RFC_N        RFC_Title
+  # Print list of available RFCs
+  elif [[ "${1,,}" == ":describe" ]]
+  then
+    # Format RFC_INDEX to show short description of each RFC
+    sed -ne '/0001/,$p' ${RFC_INDEX} \
+      | tr '\n' '#' \
+      | sed 's/##/\n/g' \
+      | sed 's/#    //g' \
+      | grep -o '.*\. ' \
+      | sed -r 's/^(.*)(January|February|March|April|May|June|July|August|September|October|November|December) [[:digit:]]{4}(.*)$/\1/'
+    printf "\nValid RFC numbers: [ ${MIN_RFC} - ${MAX_RFC} ]\n"
+    return 0
+  # Format list of RFCs related to keyword:   RFC_N  RFC_Title
   else
     ARG="$*"
     curl "https://www.rfc-editor.org/search/rfc_search_detail.php?title=${ARG}" 2>/dev/null \