improved preview

src/main.sh

@@ -8,19 +8,23 @@ set -eu
 # Load helper methods
 . "sh/helper.sh"
 
+# Load theme
+. "sh/theme.sh"
+
+# Load AWK scripts
+. "sh/awk.sh"
+
+# Load tools
+. "sh/tools.sh"
+
 # Load MusicBrainz and Discogs methods
 . "sh/api.sh"
 
+# Load preview methods
+. "sh/preview.sh"
+
 if [ "${1:-}" = "--internal-preview" ]; then
-  # Get discogs url
-  discogsurl=$(mb_get_artist "$2" |
-    $JQ -r '.relations | map(select(.type=="discogs")) | .[0].url.resource')
-  [ ! "$discogsurl" ] || [ "$discogsurl" = "(null)" ] && exit 0
-  discogsid=$(echo "$discogsurl" | awk -F "/" '{print $NF}')
-  profile=$(discogs_get_artist "$discogsid" |
-    $JQ -r '.profile')
-  [ ! "$profile" ] || [ "$profile" = "(null)" ] && exit 0
-  echo "$profile" | $CAT
+  __preview_artist "$2"
   exit 0
 fi
 
@@ -59,15 +63,6 @@ if [ "${1:-}" = "--internal-search" ]; then
   exit 0
 fi
 
-# Load theme
-. "sh/theme.sh"
-
-# Load AWK scripts
-. "sh/awk.sh"
-
-# Load tools
-. "sh/tools.sh"
-
 if [ "${1:-}" = "--help" ]; then
   $CAT <<EOF
 Usage: \`$0\` [ \`--help\` ]

src/sh/api.sh

@@ -1,3 +1,4 @@
+# Argument: Search string
 mb_browse_artists() {
   $CURL \
     --get \
@@ -7,6 +8,7 @@ mb_browse_artists() {
     "https://musicbrainz.org/ws/2/artist"
 }
 
+# Argument: MB Artist ID
 mb_get_artist() {
   $CURL \
     --get \
@@ -16,9 +18,26 @@ mb_get_artist() {
     "https://musicbrainz.org/ws/2/artist/$1"
 }
 
+# Argument: Discogs id
 discogs_get_artist() {
   $CURL \
     --get \
     -A "$APP_NAME/$APP_VERSION ($APP_WEBSITE)" \
     "https://api.discogs.com/artists/$1"
 }
+
+# Argument: wikidata id
+wikidata_get_links() {
+  $CURL \
+    --get \
+    -A "$APP_NAME/$APP_VERSION ($APP_WEBSITE)" \
+    "https://www.wikidata.org/w/rest.php/wikibase/v1/entities/items/$1/sitelinks"
+}
+
+# Argument: Wikipedia name (last part of URL)
+wikipedia_en_get_summary() {
+  $CURL \
+    --get \
+    -A "$APP_NAME/$APP_VERSION ($APP_WEBSITE)" \
+    "https://en.wikipedia.org/api/rest_v1/page/summary/$1"
+}

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
+}