---
version: '3'

vars:
  TINYPNG_API_KEY: z4qhFBLRvNMG9rHmdkSLx1DR1FNZN5gc

tasks:
  compress:
    deps:
      - :install:npm:tinypng
      - :install:software:exiftool
    desc: Compress JPG/PNG images via TinyPNG
    summary: |
      # Compress JPG/PNG images via TinyPNG

      Finding the best stack for compressing images is not easy. All the best stacks seem to
      only be available for macOS. This task gets around this shortcoming by using [TinyPNG](https://tinypng.org)
      to compress images. Although relying on a third-party service is not ideal, TinyPNG does
      a fantastic job compressing images. After an image is compressed, file meta is stored to the
      image using 'exiftool'. This helps us avoid compressing the same image twice.

      An API key is embedded in these Taskfiles but it is a free one and has usage limits. If you
      would like to use your own credits then you can [sign up for a developer account here]
      (https://tinypng.com/developers). After you sign up, save your key to a file at `~/.tinypng`
      and this task will use your API key instead.

      **Example of compressing all '**.*.(jpg|png)' files in a project:**
      `task image:compress`

      **Example of compressing single image:**
      `task image:compress -- ./path/image.png`
    cmds:
      - task: compress:{{if .CLI_ARGS}}cli{{else}}default{{end}}

  compress:cli:
    cmds:
      - |
        function compressImage() {
          if exiftool "$1" &> /dev/null; then
            if (exiftool "$1" | grep Comment | grep tinypng-compressed) > /dev/null; then
              .config/log info '`'"$1"'` has already been compressed by TinyPNG'
            else
              if [ -f ~/.tinypng ]; then
                {{.NPX_HANDLE}}tinypng "$1"
              else
                {{.NPX_HANDLE}}tinypng -k "{{.TINYPNG_API_KEY}}" "$1"
              fi
              .config/log "Adding 'tinypng-compressed' as a comment in the EXIF data"
              exiftool -overwrite_original -comment="tinypng-compressed" "$1"
              .config/log success "Successfully compressed $1"
            fi
          else
            .config/log error 'Failed to extract EXIF data from `$1` so the compression is being skipped'
          fi
        }
        compressImage '{{.CLI_ARGS}}'

  compress:default:
    cmds:
      - |
        function compressImage() {
          if exiftool "$1" &> /dev/null; then
            if (exiftool "$1" | grep Comment | grep tinypng-compressed) > /dev/null; then
              .config/log info '`'"$1"'` has already been compressed by TinyPNG'
            else
              if [ -f ~/.tinypng ]; then
                {{.NPX_HANDLE}}tinypng "$1"
              else
                {{.NPX_HANDLE}}tinypng -k "{{.TINYPNG_API_KEY}}" "$1"
              fi
              .config/log "Adding 'tinypng-compressed' as a comment in the EXIF data"
              exiftool -overwrite_original -comment="tinypng-compressed" "$1"
              .config/log success "Successfully compressed $1"
            fi
          else
            .config/log error 'Failed to extract EXIF data from `$1` so the compression is being skipped'
          fi
        }
        while read PATHH; do
          compressImage "$PATHH"
        done < <(find . -type d \( {{.IGNORE_FOLDERS}} \) -prune -o -type f \( -name '*.jpg' -o -name '*.png' \))
    sources:
      - '**/*.(jpg|png)'

  resize:
    deps:
      - :install:npm:sharp
      - :install:software:exiftool
    desc: Resize an image
    summary: |
      # Resize images

      This task leverages the NPM package named `sharp` to resize images. To use this task,
      specify the width, followed by the height, and then the image path (or just the name
      if it is in the same directory). Alternatively, you can open an interactive dialog
      to walk you through the process.

      **Example opening an interactive dialog:**
      `task image:resize`

      **Example changing the width to 200px and height to 240px of an image named `image.png`:**
      `task image:resize -- 200 240 image.png`
    cmds:
      - task: resize:{{if .CLI_ARGS}}cli{{else}}default{{end}}

  resize:cli:
    cmds:
      - |
        ARGS_ARRAY=({{.CLI_ARGS}})
        if ! exiftool "${ARGS_ARRAY[2]}" | grep "Image Size" | grep "${ARGS_ARRAY[0]}x${ARGS_ARRAY[1]}"; then
          {{.NPX_HANDLE}}sharp -i "${ARGS_ARRAY[2]}" -o "${ARGS_ARRAY[2]}.resized" resize "${ARGS_ARRAY[0]}" "${ARGS_ARRAY[1]}"
          mv "${ARGS_ARRAY[2]}.resized" "${ARGS_ARRAY[2]}"
          .config/log success "Successfully resized ${ARGS_ARRAY[2]}"
        fi
    status:
      - 'exiftool "${ARGS_ARRAY[2]}" | grep "Image Size" | grep "${ARGS_ARRAY[0]}x${ARGS_ARRAY[1]}"'

  resize:default: .config/log info "Interactive dialog coming eventually.."