Downloading-Data.ipynb

{
 "cells": [
  {
   "cell_type": "code",
   "execution_count": 1,
   "id": "00c86635",
   "metadata": {},
   "outputs": [],
   "source": [
    "#!/usr/bin/env python3\n",
    "# -*- coding: utf-8 -*-\n",
    "\"\"\"\n",
    "Created on Thu Aug  3 14:30:42 2023\n",
    "\n",
    "@author: taylo\n",
    "\"\"\"\n",
    "\n",
    "#%%Importing modules\n",
    "import numpy as np\n",
    "import matplotlib.pyplot as plt\n",
    "import pandas as pd\n",
    "\n",
    "from astropy.table import Table\n",
    "from astropy.convolution import convolve, Gaussian1DKernel\n",
    "\n",
    "#%%DESI targeting masks and DataLab related modules\n",
    "from desitarget.sv1 import sv1_targetmask    # For SV1\n",
    "from desitarget.sv2 import sv2_targetmask    # For SV2\n",
    "from desitarget.sv3 import sv3_targetmask    # For SV3\n",
    "\n",
    "from sparcl.client import SparclClient\n",
    "from dl import queryClient as qc\n",
    "from spender.data import desi\n",
    "\n",
    "#%%Load SPARCLClient and DESI Module\n",
    "client = SparclClient()\n",
    "desi = desi.DESI()\n",
    "\n",
    "#%%DESI EDR Details\n",
    "query = \"\"\"\n",
    "SELECT zp.targetid, zp.survey, zp.program, zp.healpix,  \n",
    "       zp.z, zp.zwarn, zp.coadd_fiberstatus, zp.spectype, \n",
    "       zp.mean_fiber_ra, zp.mean_fiber_dec, zp.zcat_nspec, \n",
    "       CAST(zp.zcat_primary AS INT), zp.desi_target,\n",
    "       zp.sv1_desi_target, zp.sv2_desi_target, zp.sv3_desi_target\n",
    "FROM desi_edr.zpix AS zp\n",
    "\"\"\"\n",
    "zpix = qc.query(sql = query, fmt='pandas')\n",
    "#%%\n",
    "target_id = zpix['targetid'].unique()\n",
    "\n",
    "sv1_desi_tgt = zpix['sv1_desi_target']\n",
    "sv2_desi_tgt = zpix['sv2_desi_target']\n",
    "sv3_desi_tgt = zpix['sv3_desi_target']\n",
    "\n",
    "is_sv1 = (sv1_desi_tgt != 0)\n",
    "is_sv2 = (sv2_desi_tgt != 0)\n",
    "is_sv3 = (sv3_desi_tgt != 0)\n",
    "\n",
    "\n",
    "healpix = zpix['healpix'].unique()\n",
    "healpix = list(healpix)\n",
    "\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "id": "9a895f8a",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Path to your hard drive: /\n"
     ]
    }
   ],
   "source": [
    "#%%\n",
    "import requests\n",
    "import os\n",
    "hard_drive_path = os.path.abspath(os.sep)\n",
    "print(\"Path to your hard drive:\", hard_drive_path)\n",
    "#%%\n",
    "\n",
    "def download_files(base_url, file_types, surveys, programmes, save_directory):\n",
    "    for survey in surveys:\n",
    "        z_survey = zpix.copy()\n",
    "        survey_dir = os.path.join(save_directory, survey)\n",
    "        if survey == 'sv3':\n",
    "            z_survey = z_survey[is_sv3]\n",
    "        elif survey == 'sv2':\n",
    "            z_survey = z_survey[is_sv2]\n",
    "        elif survey == 'sv1':\n",
    "            z_survey = z_survey[is_sv1]\n",
    "        elif survey == 'special':\n",
    "            z_survey == z_survey[z_survey['survey'] == 'special']\n",
    "        else:\n",
    "            z_survey == z_survey[z_survey['survey'] == 'cmx']\n",
    "        \n",
    "        for programme in programmes:\n",
    "            programme_dir = os.path.join(survey_dir, programme)\n",
    "            z_program = z_survey.copy()\n",
    "            \n",
    "            if programme == 'dark':\n",
    "                z_program = z_program[z_program['program'] == 'dark']\n",
    "            elif programme == 'bright':\n",
    "                z_program = z_program[z_program['program'] == 'bright']\n",
    "            elif programme == 'backup':\n",
    "                z_program = z_program[z_program['program'] == 'backup']\n",
    "            else:\n",
    "                z_program = z_program[z_program['program'] == 'other']\n",
    "            \n",
    "            healpix_values = z_program['healpix'].unique()\n",
    "            \n",
    "            for healpix in healpix_values:\n",
    "                healpix_str = str(healpix)  #Convert to string to get the whole healpix number\n",
    "                if len(healpix_str) == 3:\n",
    "                    healpix_dir = os.path.join(programme_dir, healpix_str[:1])\n",
    "                    short_h = healpix_str[:1]\n",
    "                elif len(healpix_str) == 4:\n",
    "                    healpix_dir = os.path.join(programme_dir, healpix_str[:2])\n",
    "                    short_h = healpix_str[:2]\n",
    "                elif len(healpix_str) == 5:\n",
    "                    healpix_dir = os.path.join(programme_dir, healpix_str[:3])\n",
    "                    short_h = healpix_str[:3]\n",
    "                else:\n",
    "                    raise ValueError(f\"Invalid healpix number: {healpix_str}\")\n",
    "\n",
    "                full_healpix_dir = os.path.join(healpix_dir, healpix_str)\n",
    "                os.makedirs(full_healpix_dir, exist_ok=True)\n",
    "\n",
    "                url = os.path.join(base_url, survey, programme, short_h, healpix_str)\n",
    "\n",
    "                for file_type in file_types:\n",
    "                    file_url = os.path.join(url, f\"{file_type}-{survey}-{programme}-{healpix_str}.h5\" if file_type == \"rrdetails\" else f\"{file_type}-{survey}-{programme}-{healpix_str}.fits\")\n",
    "                    save_path = os.path.join(full_healpix_dir, f\"{file_type}-{survey}-{programme}-{healpix_str}.h5\" if file_type == \"rrdetails\" else f\"{file_type}-{survey}-{programme}-{healpix_str}.fits\")\n",
    "                    download_file(file_url, save_path)\n",
    "\n",
    "def download_file(url, save_path):\n",
    "    \n",
    "    if os.path.exists(save_path):\n",
    "        print(f\"File already exists: {save_path}\")\n",
    "        return\n",
    "    \n",
    "    try:\n",
    "        response = requests.get(url)\n",
    "        response.raise_for_status()  \n",
    "        with open(save_path, 'wb') as file:\n",
    "            file.write(response.content)\n",
    "        print(f\"Downloaded: {save_path}\")\n",
    "    except requests.exceptions.RequestException as e:\n",
    "        print(f\"Error downloading {url}: {e}\")\n",
    "\n",
    "#%%\n",
    "# Example usage:\n",
    "base_url = \"https://data.desi.lbl.gov/public/edr/spectro/redux/fuji/healpix/\"\n",
    "file_types = [\"coadd\"] #can have [\"redrock\", \"rrdetails\", \"emline\", \"qso_mgii\", \"qso_qn\", \"coadd\"]\n",
    "surveys = [\"sv1\", \"sv2\", \"sv3\"] #can have[\"sv1\", \"sv2\", \"sv3\", \"special\", \"cmx\"]\n",
    "programmes = [\"dark\", \"bright\", \"other\", \"backup\"]\n",
    "mount_point = \"/Volumes/DESI-Data\"  # The mount point of your hard drive\n",
    "save_directory = os.path.join(mount_point, \"DESI-Data\")\n",
    "\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "3be91ca6",
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   "outputs": [
    {
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     ]
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     ]
    },
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
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     ]
    }
   ],
   "source": [
    "# Create the base directory if it doesn't exist\n",
    "os.makedirs(save_directory, exist_ok=True)\n",
    "\n",
    "download_files(base_url, file_types, surveys, programmes, save_directory)\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "01dfee07",
   "metadata": {},
   "outputs": [],
   "source": []
  }
 ],
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