William Luke
38cfb18527
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83 lines
2.5 KiB
Python
83 lines
2.5 KiB
Python
# standard imports
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import logging
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import os
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# local imports
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from cic.contract.base import Data, data_dir
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logg = logging.getLogger(__name__)
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class Attachment(Data):
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"""Processes, serialized and publishes all attachments found in the "attachments" subdirectory of the settings directory.
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:param path: Path to settings directory
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:type path: str
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:param writer: Writer interface receiving the output of the processor
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:type writer: cic.writers.OutputWriter
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"""
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def __init__(self, path=".", writer=None, interactive=False):
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super(Attachment, self).__init__()
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self.contents = {}
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self.path = path
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self.writer = writer
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self.attachment_path = os.path.join(self.path, "attachments")
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self.start()
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if interactive:
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input(
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f"Please add attachment files to '{os.path.abspath(os.path.join(self.path,'attachments'))}' and then press ENTER to continue"
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)
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self.load()
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def load(self):
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"""Loads attachment data from settings."""
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for s in os.listdir(self.attachment_path):
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fp = os.path.realpath(os.path.join(self.attachment_path, s))
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with open(fp, "rb") as f:
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r = f.read()
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z = self.hash(r).hex()
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self.contents[z] = fp
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logg.debug(f"loaded attachment file {fp} digest {z}")
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def start(self):
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"""Initialize attachment settings from template."""
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super(Attachment, self).start()
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os.makedirs(self.attachment_path, exist_ok=True)
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def get(self, k):
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"""Get a single attachment by the sha256 hash of the content.
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:param k: Content hash
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:type k: str (hex)
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"""
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return self.contents[k]
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def asdict(self):
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"""Output attachment state to dict"""
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return self.contents
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def process(self, token_address=None, token_symbol=None, writer=None):
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"""Serialize and publish attachments.
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See cic.processor.Processor.process
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"""
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if writer == None:
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writer = self.writer
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for key, value in self.contents.items():
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fp = os.path.join(self.attachment_path, value)
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with open(fp, "rb") as f:
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data = f.read()
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logg.debug(f"writing attachment {key}")
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writer.write(key, data)
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def __str__(self):
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s = ""
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for key, value in self.contents.items():
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s += f"{key} = {value}\n" # self.digests[i].hex(), self.contents[i])
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return s
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