get_images_from_a_digitised_file.ipynb

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    "# Download the contents of a digitised file from the National Archives of Australia\n",
    "\n",
    "**Why?** RecordSearch lets you download a PDF of a digitised file, but sometimes it's more convenient to work with individual images.\n",
    "\n",
    "**How?** Just enter the barcode of the file in the box below and click the button. When all the images have been downloaded they'll be zipped up, and a convenient download link will be displayed.\n",
    "\n",
    "**More?** Click the 'Edit App' button at the top of the page to see how this works."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "import os\n",
    "import shutil\n",
    "import time\n",
    "\n",
    "import ipywidgets as widgets\n",
    "import requests\n",
    "from IPython.display import HTML, display\n",
    "from recordsearch_data_scraper.scrapers import RSItem\n",
    "from slugify import slugify\n",
    "from tqdm.auto import tqdm"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "def get_images(b):\n",
    "    with out:\n",
    "        if barcode.value:\n",
    "            item = RSItem(barcode.value).data\n",
    "            if item[\"digitised_pages\"] > 0:\n",
    "                series = slugify(item[\"series\"])\n",
    "                control = slugify(item[\"control_symbol\"])\n",
    "                dir_name = f'{series}-{control}-[{item[\"identifier\"]}]'\n",
    "                dir_path = os.path.join(\"data\", \"images\", dir_name)\n",
    "                if not os.path.exists(dir_path):\n",
    "                    os.makedirs(dir_path)\n",
    "                for page in tqdm(range(1, item[\"digitised_pages\"] + 1)):\n",
    "                    filename = \"{}/{}-p{}.jpg\".format(\n",
    "                        dir_path, item[\"identifier\"], page\n",
    "                    )\n",
    "                    if not os.path.exists(filename):\n",
    "                        img_url = \"https://recordsearch.naa.gov.au/NaaMedia/ShowImage.asp?B={}&S={}&T=P\".format(\n",
    "                            item[\"identifier\"], page\n",
    "                        )\n",
    "                        response = requests.get(img_url, stream=True, verify=False)\n",
    "                        response.raise_for_status()\n",
    "                        with open(filename, \"wb\") as out_file:\n",
    "                            shutil.copyfileobj(response.raw, out_file)\n",
    "                    time.sleep(0.5)\n",
    "                shutil.make_archive(dir_path, \"zip\", dir_path)\n",
    "                link = f\"{dir_path}.zip\"\n",
    "                display(\n",
    "                    HTML(\n",
    "                        f'Download zipped images: <a href=\"{link}\" download=\"{dir_name}.zip\">{link}</a>'\n",
    "                    )\n",
    "                )\n",
    "            else:\n",
    "                print(\"Sorry, that item has not been digitised...\")\n",
    "        else:\n",
    "            print(\"You need to provide a barcode!\")"
   ]
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    "barcode = widgets.Text(\n",
    "    placeholder=\"Enter item barcode\", description=\"Barcode:\", disabled=False\n",
    ")\n",
    "display(barcode)"
   ]
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    "button = widgets.Button(\n",
    "    description=\"Get images\",\n",
    "    disabled=False,\n",
    "    button_style=\"primary\",  # 'success', 'info', 'warning', 'danger' or ''\n",
    "    tooltip=\"Click to harvest images\",\n",
    "    icon=\"\",\n",
    ")\n",
    "button.on_click(get_images)\n",
    "display(button)\n",
    "\n",
    "out = widgets.Output()\n",
    "display(out)"
   ]
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   "execution_count": null,
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   "source": [
    "%%capture\n",
    "# Load environment variables if available\n",
    "%load_ext dotenv\n",
    "%dotenv"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# TESTING\n",
    "if os.getenv(\"GW_STATUS\") == \"dev\":\n",
    "    barcode.value = \"149309\"\n",
    "    button.click()"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "----\n",
    "\n",
    "Created by [Tim Sherratt](https://timsherratt.org/) as part of the [GLAM Workbench](https://glam-workbench.github.io/)."
   ]
  }
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