Add history file

I added a history file at $XDG_DATA_HOME/bollux/history.
Its format is of the form
<date %FT%T>	<URL>	<TITLE>
the date is generated with the printf trick.  I should probably be doing
version checking or at least say we require bash 4+.

The code to get the title of the page is pretty gross.  Basically I have
to run the content of the pipeline through like, two times? A read loop.
Check out ll. 333-348 to see how weird it is.

1 files changed, 22 insertions, 7 deletions

@@ -113,6 +113,8 @@ bollux_config() {
         : "${BOLLUX_LESSKEY:=/tmp/bollux-lesskey}" # where to store binds
         : "${BOLLUX_PAGESRC:=/tmp/bollux-src}"     # where to save the page source
         : "${BOLLUX_URL:=}"                        # start url
+        : "${BOLLUX_DATADIR:=${XDG_DATA_DIR:-$HOME/.local/share}/bollux}"
+        BOLLUX_HISTFILE="$BOLLUX_DATADIR/history" # where to store the history
         ## typesetting
         : "${T_MARGIN:=4}"      # left and right margin
         : "${T_WIDTH:=0}"       # width of the viewport -- 0 = get term width
@@ -323,15 +325,26 @@ handle_response() {
         case "$code" in
         1*)
                 REDIRECTS=0
-                run history_append "$URL"
+                run history_append "$URL" "$meta"
                 run prompt "$meta" QUERY
                 # shellcheck disable=2153
                 run blastoff "?$QUERY"
                 ;;
         2*)
                 REDIRECTS=0
-                run history_append "$URL"
-                run display "$meta"
+                # read ahead to find a title
+                while read -r; do
+                        printf -v pretitle "%s\n" "$REPLY"
+                        if [[ "$REPLY" =~ ^#[[:space:]]*(.*) ]]; then
+                                title="${BASH_REMATCH[1]}"
+                                break
+                        fi
+                done
+                run history_append "$URL" "$title"
+                {
+                        printf '%s' "$pretitle"
+                        while read -r; do printf '%s\n' "$REPLY"; done
+                } | run display "$meta"
                 ;;
         3*)
                 ((REDIRECTS += 1))
@@ -653,12 +666,14 @@ download() {
 history_init() {
         declare -a HISTORY # history is kept in an array
         HN=0               # position of history in the array
+        run mkdir -p "${BOLLUX_HISTFILE%/*}"
 }
 
-history_append() { # history_append URL
+history_append() { # history_append URL TITLE
         BOLLUX_URL="$1"
+        # date/time, url, title (best guess)
+        run printf '%(%FT%T)T\t%s\t%s\n' -1 "$1" "$2" >>"$BOLLUX_HISTFILE"
         HISTORY[$HN]="$BOLLUX_URL"
-        log d "HN=$HN HISTORY: ${HISTORY[*]}"
         ((HN += 1))
 }
 
@@ -670,7 +685,7 @@ history_back() {
                 log e "Beginning of history."
                 return 1
         fi
-        blastoff "${HISTORY[$HN]}"
+        run blastoff "${HISTORY[$HN]}"
 }
 history_forward() {
         log d "HN=$HN"
@@ -679,7 +694,7 @@ history_forward() {
                 log e "End of history."
                 return 1
         fi
-        blastoff "${HISTORY[$HN]}"
+        run blastoff "${HISTORY[$HN]}"
 }
 
 if [[ "${BASH_SOURCE[0]}" == "$0" ]]; then