improved MB API wrappres

src/main.sh

@@ -366,6 +366,7 @@ esac
 while true; do
   case "${1:-}" in
   "--artist")
+    mb_artist "$2" >>/tmp/foo
     name="$(mb_artist "$2" | $JQ -r '.name')"
     secsymb="$(printf "$FORMAT_TYPE_HAS_SECONDARY" "")"
     sel=$(

src/sh/api.sh

@@ -1,93 +1,143 @@
+MB_MAX_RETRIES=10
 MB_BROWSE_STEPS=100
+USER_AGENT="$APP_NAME/$APP_VERSION ($APP_WEBSITE)"
+SLEEP_ON_ERROR=1
 export MB_BROWSE_STEPS
 
-api_mb_artist() {
+__api_mb() {
+  tmpout=$(mktemp)
+  for _ in $(seq "$MB_MAX_RETRIES"); do
+    case "$1" in
+    "artist")
       $CURL \
+        --output "$tmpout" \
         --get \
         --data fmt=json \
         --data inc="url-rels+artist-rels+aliases" \
-    -A "$APP_NAME/$APP_VERSION ($APP_WEBSITE)" \
-    "https://musicbrainz.org/ws/2/artist/$1"
-}
-api_mb_releasegroup() {
+        -A "$USER_AGENT" \
+        "https://musicbrainz.org/ws/2/artist/$2"
+      ;;
+    "releasegroup")
       $CURL \
+        --output "$tmpout" \
         --get \
         --data fmt=json \
         --data inc=artist-credits \
-    -A "$APP_NAME/$APP_VERSION ($APP_WEBSITE)" \
-    "https://musicbrainz.org/ws/2/release-group/$1"
-}
-
-api_mb_release() {
+        -A "$USER_AGENT" \
+        "https://musicbrainz.org/ws/2/release-group/$2"
+      ;;
+    "release")
       $CURL \
+        --output "$tmpout" \
         --get \
         --data fmt=json \
         --data inc="recordings+artist-credits+release-groups+labels" \
-    -A "$APP_NAME/$APP_VERSION ($APP_WEBSITE)" \
-    "https://musicbrainz.org/ws/2/release/$1"
-}
-
-api_mb_browse_artist_releasegroups() {
+        -A "$USER_AGENT" \
+        "https://musicbrainz.org/ws/2/release/$2"
+      ;;
+    "browse-artist-releasegroups")
       $CURL \
+        --output "$tmpout" \
         --get \
         --data fmt=json \
         --data inc=artist-credits \
         --data limit="$MB_BROWSE_STEPS" \
-    --data offset="${2:-0}" \
-    --data artist="$1" \
-    -A "$APP_NAME/$APP_VERSION ($APP_WEBSITE)" \
+        --data offset="$3" \
+        --data artist="$2" \
+        -A "$USER_AGENT" \
         "https://musicbrainz.org/ws/2/release-group"
-}
-
-api_mb_browse_releasegroup_releases() {
+      ;;
+    "browse-releasegroup-releases")
       $CURL \
+        --output "$tmpout" \
         --get \
         --data fmt=json \
         --data inc="artist-credits+labels+media+release-groups" \
         --data limit="$MB_BROWSE_STEPS" \
-    --data offset="${2:-0}" \
-    --data release-group="$1" \
-    -A "$APP_NAME/$APP_VERSION ($APP_WEBSITE)" \
+        --data offset="$3" \
+        --data release-group="$2" \
+        -A "$USER_AGENT" \
         "https://musicbrainz.org/ws/2/release"
+      ;;
+    "search-artist")
+      $CURL \
+        --output "$tmpout" \
+        --get \
+        --data fmt=json \
+        --data-urlencode query="$2" \
+        -A "$USER_AGENT" \
+        "https://musicbrainz.org/ws/2/artist"
+      ;;
+    "search-releasegroup")
+      $CURL \
+        --output "$tmpout" \
+        --get \
+        --data fmt=json \
+        --data inc=artist-credits \
+        --data-urlencode query="$2" \
+        -A "$USER_AGENT" \
+        "https://musicbrainz.org/ws/2/release-group"
+      ;;
+    esac
+    if ! $JQ -e '.error' "$tmpout" >/dev/null 2>/dev/stdout; then
+      cat "$tmpout"
+      rm -f "$tmpout"
+      return 0
+    else
+      sleep "$SLEEP_ON_ERROR"
+    fi
+  done
+  rm -f "$tmpout"
+  err "Failed to fetch MusicBrainz data for $1 $2"
+  return 1
+}
+
+api_mb_artist() {
+  __api_mb "artist" "$1"
+}
+
+api_mb_releasegroup() {
+  __api_mb "releasegroup" "$1"
+}
+
+api_mb_release() {
+  __api_mb "release" "$1"
+}
+
+api_mb_browse_artist_releasegroups() {
+  __api_mb "browse-artist-releasegroups" "$1" "${2:-0}"
+}
+
+api_mb_browse_releasegroup_releases() {
+  __api_mb "browse-releasegroup-releases" "$1" "${2:-0}"
 }
 
 # Argument: Search string
 api_mb_search_artist() {
-  $CURL \
-    --get \
-    --data fmt=json \
-    --data-urlencode query="$1" \
-    -A "$APP_NAME/$APP_VERSION ($APP_WEBSITE)" \
-    "https://musicbrainz.org/ws/2/artist"
+  __api_mb "search-artist" "$1"
 }
 
 api_mb_search_releasegroup() {
-  $CURL \
-    --get \
-    --data fmt=json \
-    --data inc=artist-credits \
-    --data-urlencode query="$1" \
-    -A "$APP_NAME/$APP_VERSION ($APP_WEBSITE)" \
-    "https://musicbrainz.org/ws/2/release-group"
+  __api_mb "search-releasegroup" "$1"
 }
 
 api_discogs_artist() {
   $CURL \
     --get \
-    -A "$APP_NAME/$APP_VERSION ($APP_WEBSITE)" \
+    -A "$USER_AGENT" \
     "https://api.discogs.com/artists/$1"
 }
 
 api_wikidata_sitelinks() {
   $CURL \
     --get \
-    -A "$APP_NAME/$APP_VERSION ($APP_WEBSITE)" \
+    -A "$USER_AGENT" \
     "https://www.wikidata.org/w/rest.php/wikibase/v1/entities/items/$1/sitelinks"
 }
 
 api_wikipedia_en_summary() {
   $CURL \
     --get \
-    -A "$APP_NAME/$APP_VERSION ($APP_WEBSITE)" \
+    -A "$USER_AGENT" \
     "https://en.wikipedia.org/api/rest_v1/page/summary/$1"
 }