geomon/pechgraben_images/import_image_observations.py

'''
Sqlalchemy version: 1.2.15
Python version: 3.7
'''

import os
import uuid
from datetime import datetime
from sqlalchemy.orm import session
from sqlalchemy import asc, desc
from exif import Image
from db.models import (
    create_pg_session, Observation,
    Dataset, Procedure, Phenomenon, Platform, Format)

def main():
    ''' main method '''
    pg_session: session = create_pg_session()
    platform_sta_identifier = "pechgraben_images"
    sensor = "camera2"

    pg_query = pg_session.query(Dataset) \
        .join(Procedure) \
        .join(Phenomenon) \
        .filter(Procedure.sta_identifier == sensor.lower())
    visual_perception_dataset: Dataset = pg_query.filter(
        Phenomenon.sta_identifier == "HumanVisualPerception").first()
    if not visual_perception_dataset:
        print("Sensor " + sensor + " ist noch nicht angelegt!")
        exit()
    if not visual_perception_dataset.is_published:
        visual_perception_dataset.is_published = 1
        visual_perception_dataset.is_hidden = 0
        visual_perception_dataset.dataset_type = "timeseries"
        visual_perception_dataset.observation_type = "simple"
        visual_perception_dataset.value_type = "text"
        pg_session.commit()

    platform_exists: bool = pg_session.query(Platform.id).filter_by(
        sta_identifier=platform_sta_identifier).scalar() is not None
    if platform_exists:
        sensor_platform = pg_session.query(Platform.id) \
            .filter(Platform.sta_identifier == platform_sta_identifier) \
            .first()
        visual_perception_dataset.fk_platform_id = sensor_platform.id

    format_exists: bool = pg_session.query(Format.id).filter_by(
        definition="http://www.opengis.net/def/observationType/OGC-OM/2.0/OM_TextObservation"
        ).scalar() is not None
    if format_exists:
        sensor_format = pg_session.query(Format.id) \
            .filter(Format.definition == "http://www.opengis.net/def/observationType/OGC-OM/2.0/OM_TextObservation") \
            .first()
        visual_perception_dataset.fk_format_id = sensor_format.id

    # import all the images for the given sensor names
    import_images(visual_perception_dataset, pg_session)

    # save first and last values of all the observations
    first_observation: Observation = pg_session.query(Observation) \
        .filter(Observation.fk_dataset_id == visual_perception_dataset.id) \
        .order_by(asc('sampling_time_start')) \
        .first()
    if first_observation is not None:
        visual_perception_dataset.first_time = first_observation.sampling_time_start
        # visual_perception_dataset.first_value = first_observation.value_quantity
        visual_perception_dataset.fk_first_observation_id = first_observation.id

    last_observation: Observation = pg_session.query(Observation) \
        .filter(Observation.fk_dataset_id == visual_perception_dataset.id) \
        .order_by(desc('sampling_time_start')) \
        .first()
    if last_observation is not None:
        visual_perception_dataset.last_time = last_observation.sampling_time_start
        # visual_perception_dataset.last_value = last_observation.value_quantity
        visual_perception_dataset.fk_last_observation_id = last_observation.id

    pg_session.commit()
    pg_session.close()

def import_images(dataset: Dataset, pg_session):
    ''' main method '''
    folder_path = 'C:/Users/kaiarn/Documents/Fotos'
    # img_filename = '_DSC9548.JPG'
    # img_path = f'{folder_path}/{img_filename}'

    # Get the list of image files in the directory that exifread supports
    directory = os.listdir(folder_path)
    for file_name in directory:
        if file_name.endswith(('jpg', 'JPG', 'png', 'PNG', 'tiff', 'TIFF')):
            file_path = os.path.join(folder_path, file_name)
            # print(file_path)
            img_file = open(file_path, 'rb')
            img: Image = Image(img_file)
            if img.has_exif:
                info = f" has the EXIF {img.exif_version}"
            else:
                info = "does not contain any EXIF information"
            # print(f"Image {img_file.name}: {info}")

            # Original datetime that image was taken (photographed)
            # print(f'DateTime (Original): {img.get("datetime_original")}')
            datetime_original = img.get("datetime_original")
            # Grab the date
            date_obj = datetime.strptime(
                datetime_original, '%Y:%m:%d %H:%M:%S')
            # print(date_obj)
            create_observation(dataset, date_obj, file_name)

    pg_session.commit()

def create_observation(dataset: Dataset, datetime_original, file_name):
    """
    This function creates a new observation in the people structure
    based on the passed-in observation data
    :param observation:  person to create in people structure
    :return:        201 on success, observation on person exists
    """

    # deserialize to python object
    new_observation: Observation = Observation()
    # new_observation.id = max_id
    new_observation.sta_identifier = str(uuid.uuid4())
    new_observation.result_time = datetime_original
    new_observation.sampling_time_start = new_observation.result_time
    new_observation.sampling_time_end = new_observation.result_time
    new_observation.value_type = "text"
    new_observation.value_text = "https://geomon.geologie.ac.at/images/" + file_name
    new_observation.fk_dataset_id = dataset.id

    # Add the person to the database
    dataset.observations.append(new_observation)
    # db_session.commit()


if __name__ == "__main__":
    # load_dotenv(find_dotenv())
    # print('sensors:  {}'.format(os.environ.get(
    #     'GLASFASER_GSCHLIEFGRABEN_SENSORS', [])))
    main()

# print(img.list_all())
# print(img.has_exif)
# # Make of device which captured image: NIKON CORPORATION
# print(f'Make: {img.get("make")}')

# # Model of device: NIKON D7000
# print(f'Model: {img.get("model")}')

# # Software involved in uploading and digitizing image: Ver.1.04
# print(f'Software: {img.get("software")}')

# # Name of photographer who took the image: not defined
# print(f'Artist: {img.get("artist")}')

# # Original datetime that image was taken (photographed)
# print(f'DateTime (Original): {img.get("datetime_original")}')

# # Details of flash function
# print(f'Flash Details: {img.get("flash")}')

# print(f"Coordinates - Image")
# print("---------------------")
# print(f"Latitude: {img.copyright} {img.get('gps_latitude_ref')}")
# print(f"Longitude: {img.get('gps_longitude')} {img.get('gps_longitude_ref')}\n")