improved auto grouping

[serve0] / db_meta.sh

diff --git a/db_meta.sh b/db_meta.sh
index 9f427fc65b38c3b554ca20c0d61ece87181b55af..d2d6999c0778fa2b19d211d7c9ca8b3cc7ab7dac 100755 (executable)
--- a/db_meta.sh
+++ b/db_meta.sh
@@ -28,15 +28,15 @@ read_meta() {
 
   # Global exports
   META_LENGTH='' META_WIDTH='' META_HEIGHT='' META_TAGS=''
-  META_COMMENT='' META_NAME='' META_GROUP=''
+  META_COMMENT='' META_NAME='' META_GROUP='' META_GROUPORDER=''
 
   if [ $# -eq 0 ]; then
     read -r META_LENGTH META_WIDTH META_HEIGHT META_TAGS META_COMMENT \
-            META_NAME META_GROUP
+            META_NAME META_GROUP META_GROUPORDER
   elif [ "$name" -a -f "$meta_db" -a -r "$meta_db" ]; then
     read -r META_LENGTH META_WIDTH META_HEIGHT META_TAGS META_COMMENT \
-            META_NAME META_GROUP <<-EOF
-       $(grep -F "     ${name}${CR}" "$meta_db")
+            META_NAME META_GROUP META_GROUPORDER <<-EOF
+       $(grep -F "     ${name}${CR}" "$meta_db" |dbmeta_autogroup)
        EOF
   fi
   if [ "$META_NAME" ]; then
@@ -155,10 +155,38 @@ list_meta(){
     pfx="$(STRING "${pfx#/}")"
     [ "$pfx" = '\' ] && pfx='' || pfx="${pfx}/"
 
-    while read -r LENGTH WIDTH HEIGHT TAGS COMMENT NAME GROUP; do
+    dbmeta_autogroup "$meta" \
+    | while read -r LENGTH WIDTH HEIGHT TAGS COMMENT NAME GROUP; do
       printf '%i       %i      %i      tags=%s comment=%s      %s%s\r  %s\n' \
              $LENGTH $WIDTH $HEIGHT "${TAGS#tags=}" \
              "${COMMENT#comment=}" "${pfx}" "${NAME%${CR}}" "${GROUP:-\\}"
-    done <"$meta"
+    done
   done
 }
+
+dbmeta_autogroup(){
+  sed -E '
+    # perform auto grouping if group id is missing or empty
+    /\r$/bAUTOGROUP; s;\r      \\$;\r;; tAUTOGROUP;
+  
+    # skip auto grouping if manual group id is present
+    /\r        .+$/b;
+  
+    :AUTOGROUP
+    # save original dataset
+    h;
+  
+    # strip all fields but the name
+    s;^[^\t]+  [^\t]+  [^\t]+  [^\t]+  [^\t]+  ;;
+    # strip common suffixes of web video sites
+    s;-([0-9a-zA-Z_-]{11}|ph[0-9a-f]{13}|[0-9]{6,})\r$;-\r;;
+  
+    # replace all numeric parts and append numerals to an ordering field
+    # the group id will be made up of only the non-numeric character frame
+    # the ordering field will hold all numbers from the name
+    :X s;^([^\r0-9]*)([0-9]+)([^\r0-9]*)\r\t?([0-9]*)$;\1\r\3\r        \4\2;; tX;
+  
+    # append group id and ordering field to dataset
+    H; g; s;\n;\t;;
+  ' "$@"
+}