add caching to commands

lib/deezer.sh

@@ -0,0 +1,48 @@
+#!/usr/bin/env bash
+
+# many functions are invoked via variables
+# shellcheck disable=SC2329
+
+get_deezer_isrc_response() {
+    local isrc="$1"
+    if [[ -z "${isrc}" ]]; then
+        error "missing isrc"
+        return 1
+    fi
+
+    cache_command \
+        curl \
+        --silent \
+        --retry 3 \
+        "https://api.deezer.com/track/isrc:${isrc}"
+}
+
+get_deezer_url() {
+    local isrc="$1"
+    if [[ -z "${isrc}" ]]; then
+        error "missing isrc"
+        return 1
+    fi
+
+    local deezerResponse=''
+    deezerResponse="$(get_deezer_isrc_response "${isrc}")" || return 1
+
+    local jqResult=''
+    jqResult="$(jq -r .link <<<"${deezerResponse}")"
+
+    if ! jq_result_valid "${jqResult}"; then
+        error "could not get link from deezer for ${isrc}"
+        return 1
+    fi
+
+    echo "${jqResult}"
+}
+
+download_with_deezer() {
+    local isrc="$1"
+    local output="$2"
+    download_with_librelyrics \
+        "${isrc}" \
+        "${output}" \
+        deezer
+}