Port the fish_greeting shell greeting to the new API
The original script (J621-Django/extras/fish_greeting system) downloaded image bytes from /random/?rating=X and read the X-File-* headers. The new API answers with JSON and a signed link, so the greeting now: - asks /api/random/?fastfetch=1&rating=<mode> for JSON; - parses url/j_id/filename/md5 with jq, python3, or a grep/sed fallback; - downloads the signed link and keeps the original display path (fastfetch kitty/kitty-icat logos, gifsicle preprocessing for GIFs, recursion guard, logging with rotation, greeting_mode 0/1/2 = NSFW/SFW/Questionable); - is configured through ~/.config/j621Greeting/config.fish or universal variables (J621_BASE, J621_WEB, J621_TOKEN, J621_FASTFETCH_CONFIG) instead of a hardcoded host, and prints the /detail/<J-ID> link on J621_WEB; - reports the API's own 404 message when a rating has no images, and keeps curl quiet so failures do not spill into the greeting. extras/fish_greeting/ contains the function, an install.fish (copies it into the fish functions dir, creates the config once, checks dependencies) and a README with the old-vs-new table and troubleshooting. The existing gm-switch helper and .desktop launchers keep working (same mode file). Tested with fish 4.9.3: syntax check on every file, guest and token runs against the dev API (unsigned vs signed URLs), the empty-rating and unreachable-API paths, and the grep/sed fallback with jq and python3 unavailable.
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# fish_greeting — show a random library image as the shell greeting.
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#
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# Updated for the J621 Docker/REST rewrite: the API answers with JSON that
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# carries a signed URL instead of streaming the image, so this function asks
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# for one random png/jpg/gif (fastfetch mode), downloads the signed link and
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# hands the file to fastfetch. Based on the original script from
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# J621-Django/extras/fish_greeting system/fish_greeting.fish.
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#
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# Requires: curl (or wget) and fastfetch; gifsicle is used for animated GIFs
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# (without it, the GIF is shown as-is).
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#
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# Rating modes (same file as the original script):
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# ~/.config/fish/greeting_mode 0 = NSFW (explicit), 1 = SFW (safe),
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# 2 = Questionable (default)
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#
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# Configuration, any of these (all optional):
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# ~/.config/j621Greeting/config.fish with `set -g VAR value` lines, or
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# universal variables, e.g. `set -Ux J621_BASE https://j621.example.ts.net`
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# J621_BASE API origin (default https://j621.rainbow-herring.ts.net)
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# J621_TOKEN API token, sent as `Authorization: Token …`; needed for
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# signed URLs and for hidden-from-guests items (optional)
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# J621_WEB Web origin used in the printed link (defaults to J621_BASE)
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# J621_FASTFETCH_CONFIG fastfetch config name (default "jake")
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function __j621_json_field --argument-names json field
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if command -v jq >/dev/null 2>&1
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printf '%s' "$json" | jq -r --arg field "$field" '.[$field] // empty'
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else if command -v python3 >/dev/null 2>&1
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printf '%s' "$json" | python3 -c "import json,sys; value = json.load(sys.stdin).get(sys.argv[1], ''); print(value if value is not None else '')" $field
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else
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printf '%s' "$json" | grep -o "\"$field\"[[:space:]]*:[[:space:]]*\"[^\"]*\"" | head -1 | sed -E 's/.*:[[:space:]]*"//; s/"$//'
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end
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end
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function __j621_fetch_random --argument-names rating
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set base (string trim --right --chars=/ "$J621_BASE")
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set api_url "$base/api/random/?fastfetch=1&rating=$rating"
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set curl_args -s -L --max-time 20
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if set -q J621_TOKEN; and test -n "$J621_TOKEN"
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set -a curl_args -H "Authorization: Token $J621_TOKEN"
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end
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if command -v curl >/dev/null 2>&1
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curl $curl_args "$api_url" | string collect
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else if command -v wget >/dev/null 2>&1
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wget -qO- "$api_url" | string collect
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end
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end
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function fish_greeting --argument-names depth
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# Initialize depth to 0 if not provided or empty
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if not set -q depth; or test -z "$depth"
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set depth 0
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end
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set MAX_DEPTH 3
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# --- Configuration ---
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set config_file ~/.config/j621Greeting/config.fish
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if test -f $config_file
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source $config_file
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end
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set -q J621_BASE; or set -g J621_BASE https://j621.rainbow-herring.ts.net
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set -q J621_WEB; or set -g J621_WEB $J621_BASE
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set -q J621_FASTFETCH_CONFIG; or set -g J621_FASTFETCH_CONFIG jake
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set web_base (string trim --right --chars=/ "$J621_WEB")
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# --- Setup logging ---
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set log_dir ~/.config/j621Logos
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if not test -d $log_dir
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mkdir -p $log_dir
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end
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set log_file $log_dir/logs.log
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# --- Mode selection ---
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if test -f ~/.config/fish/greeting_mode
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set mode (cat ~/.config/fish/greeting_mode | string trim)
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else
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set mode 2
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end
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switch $mode
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case "0"
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set rating e
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set modename "NSFW"
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case "1"
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set rating s
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set modename "SFW"
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case "2"
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set rating q
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set modename "Questionable"
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case "*"
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echo "Unknown mode, using default NSFW"
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set rating e
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set modename "NSFW"
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end
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# --- Ask the API for a random image (JSON with a signed URL) ---
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set json (__j621_fetch_random $rating)
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set image_url (__j621_json_field "$json" url)
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set j_id (__j621_json_field "$json" j_id)
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set md5 (__j621_json_field "$json" md5)
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set filename (__j621_json_field "$json" filename)
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if test -z "$image_url"
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set detail (__j621_json_field "$json" detail)
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fastfetch --config "$J621_FASTFETCH_CONFIG"
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if test -n "$detail"
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printf '\e[4;2;38;2;138;0;222;49mNo logo (%s)\e[0m\n' "$detail"
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else
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printf '\e[4;2;38;2;138;0;222;49mNo logo (API error)\e[0m\n'
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end
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echo "$(date '+%Y-%m-%d %H:%M:%S') No logo for rating=$rating: $detail" >> "$log_file"
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return
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end
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# --- Download the signed image ---
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set tempfile (mktemp /tmp/fastfetch_logo_XXXXXX)
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set download_success 0
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if command -v curl >/dev/null 2>&1
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curl -s -L --max-time 60 -o "$tempfile" "$image_url"
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if test $status -eq 0 -a -s "$tempfile"
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set download_success 1
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end
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else if command -v wget >/dev/null 2>&1
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wget -q -O "$tempfile" "$image_url"
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if test $status -eq 0 -a -s "$tempfile"
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set download_success 1
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end
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end
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if test $download_success -ne 1
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fastfetch --config "$J621_FASTFETCH_CONFIG"
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printf '\e[4;2;38;2;138;0;222;49mNo logo (download failed)\e[0m\n'
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echo "$(date '+%Y-%m-%d %H:%M:%S') Download failed for $j_id" >> "$log_file"
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rm -f "$tempfile"
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return
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end
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# --- Determine MIME type ---
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set mime (file --mime-type -b "$tempfile" 2>/dev/null | string trim | string collect)
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# --- Accept only PNG, JPEG, GIF; everything else causes one more roll ---
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if not string match -q "image/png" "$mime"; and not string match -q "image/jpeg" "$mime"; and not string match -q "image/gif" "$mime"
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if test $depth -lt $MAX_DEPTH
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fish_greeting (math $depth + 1)
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else
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printf '\e[31mMax recursion depth reached, skipping unsupported file type: %s\e[0m\n' "$mime"
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end
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if test $depth -eq 0
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printf '\e[31mForked (Got unsupported type: %s - %s)\e[0m\n' "$mime" "$filename"
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if test -n "$md5"
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echo "Link: $web_base/view/$md5"
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end
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end
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rm -f "$tempfile" "$tempfile.tmp" 2>/dev/null
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return
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end
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# --- Process the file (only PNG, JPEG, GIF reach here) ---
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set logo_type "kitty"
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set processing_success 1
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switch "$mime"
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case "image/png" "image/jpeg"
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set logo_type "kitty"
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case "image/gif"
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set processed_ok 0
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set simple_file (mktemp /tmp/fastfetch_simple_XXXXXX)
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set gif_err (mktemp)
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if command -v gifsicle >/dev/null 2>&1
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gifsicle --colors 255 "$tempfile" > "$simple_file" 2> "$gif_err"
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set gif_exit $status
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if test $gif_exit -eq 0 -a -s "$simple_file"
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gifsicle --unoptimize --resize-fit 360x360 "$simple_file" > "$tempfile.tmp" 2> "$gif_err"
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set final_exit $status
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set gif_warnings (cat "$gif_err" | string trim)
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if test $final_exit -eq 0 -a -s "$tempfile.tmp" -a -z "$gif_warnings"
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mv "$tempfile.tmp" "$tempfile"
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set processed_ok 1
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set logo_type "kitty-icat"
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echo "$(date '+%Y-%m-%d %H:%M:%S') GIF processed with gifsicle" >> "$log_file"
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else
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echo "$(date '+%Y-%m-%d %H:%M:%S') gifsicle final failed: $gif_warnings" >> "$log_file"
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end
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else
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echo "$(date '+%Y-%m-%d %H:%M:%S') gifsicle --colors failed" >> "$log_file"
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end
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end
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rm -f "$simple_file" "$gif_err"
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if test $processed_ok -eq 0
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set logo_type "kitty-icat"
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echo "$(date '+%Y-%m-%d %H:%M:%S') Using original GIF (processing failed)" >> "$log_file"
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end
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end
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# --- Display result ---
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if test $processing_success -eq 1
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fastfetch --config "$J621_FASTFETCH_CONFIG" --logo-type "$logo_type" --logo "$tempfile" --logo-width 35
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set timestamp (date '+%Y-%m-%d %H:%M:%S')
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echo "$timestamp Downloaded: $j_id $filename [$modename]" >> "$log_file"
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if test -n "$filename"
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printf '\e[4;2;38;2;138;0;222;49mLogo from API: %s (%s, %s)\e[0m\n' "$filename" "$modename" "$j_id"
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echo "Link: $web_base/detail/$j_id"
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else
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printf '\e[4;2;38;2;138;0;222;49mLogo from API (%s)\e[0m\n' "$modename"
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end
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else
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fastfetch --config "$J621_FASTFETCH_CONFIG"
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printf '\e[4;2;38;2;138;0;222;49mNo logo (Image processing error)\e[0m\n'
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end
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# --- Keep only the last 1000 lines of the log ---
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set log_tmp (mktemp)
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tail -n 1000 "$log_file" > "$log_tmp" 2>/dev/null
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mv "$log_tmp" "$log_file"
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# --- Cleanup ---
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rm -f "$tempfile" "$tempfile.tmp" 2>/dev/null
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end
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