improved preview

src/sh/preview.sh

@@ -0,0 +1,35 @@
+__description_from_wikidata() {
+  wiki=$(wikidata_get_links "$1" | $JQ -r '.enwiki' | awk -F "/" '{print $NF}')
+  [ ! "$wiki" ] || [ "$wiki" = "null" ] && return
+  desc=$(wikipedia_en_get_summary "$wiki" | $JQ -r '.extract')
+  [ ! "$wiki" ] || [ "$wiki" = "null" ] && return
+  echo "$desc"
+}
+
+# For now, this prints the description of the artist.
+#
+# Source of information:
+# 1. Wikipedia
+# 2. Discogs
+__preview_artist() {
+  # Get artist information from MusicBrainz
+  artist_relations=$(mb_get_artist "$1" | $JQ -r ".relations")
+  wikidata=$(echo "$artist_relations" |
+    $JQ -r 'map(select(.type="wikidata")) | .[0].url.resource' |
+    awk -F "/" '{print $NF}')
+  if [ "$wikidata" ] && [ "$wikidata" != "null" ]; then
+    desc=$(__description_from_wikidata "$wikidata")
+  fi
+  # Alternative: Get information from Discogs
+  if [ ! "${desc:-}" ]; then
+    discogs=$(echo "$artist_relations" |
+      $JQ -r 'map(select(.type=="discogs")) | .[0].url.resource' |
+      awk -F "/" '{print $NF}')
+    [ ! "$discogs" ] || [ "$discogs" = "null" ] && return
+    desc=$(discogs_get_artist "$discogs" |
+      $JQ -r '.profile')
+    [ ! "$desc" ] || [ "$desc" = "null" ] && return
+  fi
+
+  echo "$desc" | fold -s -w "$FZF_PREVIEW_COLUMNS" | $CAT
+}