Issue #8, convert hunspell output to spellchecker JSON format

backend/spellchecker/README.md

@@ -0,0 +1,14 @@
+### huntojson.sh
+Convert hunspell output to JSON for spellchecker.
+
+Launch hunspell on input file, convert output to spellchecker JSON format and write to standard output.
+Usage: `./huntojson.sh [options...] [file]`
+Options:
+`-h`         display this help and exit
+`-d dict`    use custom dictionaries
+
+Example:  
+```bash
+./huntojson.sh demo.tex                      # launch hunspell on 'demo.tex'
+./huntojson.sh -d ru_RU ru_demo.tex          # use russian dictionary
+```

backend/spellchecker/huntojson.sh

@@ -0,0 +1,70 @@
+#!/bin/bash
+
+# usage info
+show_help() {
+cat << EOF
+Usage: ${0##*/} [options...] [file]
+Launch hunspell on file, convert output to JSON format 
+and write to standard output.
+
+    -h         display this help and exit
+    -d dict    use custom dictionaries
+
+Example: ${0##*/} demo.tex                      # launch hunspell on 'demo.tex'
+         ${0##*/} -d ru_RU ru_demo.tex          # use russian dictionary
+EOF
+}
+
+DICT=
+OPTIND=1
+
+# command line arguments processing
+while getopts ":hd:" opt; do
+    case "$opt" in
+        h)
+            show_help
+            exit 0
+            ;;
+        d)
+            DICT="-p $OPTARG"
+            ;;
+        ?)
+            echo -e "Invalid option: -$OPTARG\n" >&2
+            show_help >&2
+            exit 1
+            ;;
+    esac
+done
+shift $((OPTIND-1))
+
+if [ "$#" != "1" ]
+then
+    echo -e "Missing input file\n" >&2
+    show_help >&2
+    exit 2
+fi
+
+INFILE=$1
+
+JSON=$(
+    cat $INFILE    | 
+    hunspell -a -t | 
+    grep "^&.*"    | 
+    awk $DICT '
+    BEGIN { print "{" }
+    {
+        print "\t\""$2"\": [" ;
+
+        split($0, split_string, ": ");
+        options_number=split(split_string[2], options, ", ");
+
+        for (i = 1; i <= options_number; i++) 
+            {print "\t\t\""options[i]"\","} 
+
+        print "\t]," }
+    END { print "}" }
+    '
+)
+
+echo $JSON
+