commit d24f7e18f268241ec760362559db4c848e239dd1
Author: Dima Gerasimov <karlicoss@gmail.com>
Date:   Fri May 3 22:53:59 2019 +0100

    initial work on polar

diff --git a/reading/polar.py b/reading/polar.py
new file mode 100755
index 0000000..4c381e2
--- /dev/null
+++ b/reading/polar.py
@@ -0,0 +1,172 @@
+#!/usr/bin/python3
+from pathlib import Path
+import logging
+from typing import List, Dict, Iterator, NamedTuple, Sequence, Optional
+import json
+
+from kython.kerror import ResT, echain, unwrap, sort_res_by
+from kython.klogging import setup_logzero
+
+
+BDIR = Path('/L/zzz_syncthing/data/.polar')
+
+
+def get_logger():
+    return logging.getLogger('polar-provider')
+
+
+def _get_datas() -> List[Path]:
+    return list(sorted(BDIR.glob('*/state.json')))
+
+
+Uid = str
+
+class Error(Exception):
+    def __init__(self, p: Path, *args, **kwargs) -> None:
+        super().__init__(*args, **kwargs) # type: ignore
+        self.uid: Uid = p.parent.name
+
+ResultItem = ResT['Item', Error]
+class Item(NamedTuple):
+    uid: Uid
+
+ResultBook = ResT['Book', Error]
+
+class Book(NamedTuple):
+    uid: Uid
+    filename: str
+    title: Optional[str]
+    items: Sequence[ResultItem]
+
+from kython.konsume import zoom, akeq
+
+class Loader:
+    def __init__(self, p: Path) -> None:
+        self.path = p
+        self.uid = self.path.parent.name
+        self.err = Error(p)
+        self.logger = get_logger()
+
+    def error(self, cause, extra):
+        return echain(Error(self.path, extra), cause)
+
+    def load_item(self, meta) -> Iterator[ResultItem]:
+        # TODO this should be destructive zoom?
+        try:
+            meta['notes'].zoom()
+            meta['pagemarks'].zoom()
+            if 'notes' in meta:
+                # TODO something nicer?
+                meta['notes'].zoom()
+            meta['comments'].zoom()
+            meta['questions'].zoom()
+            meta['flashcards'].zoom()
+            meta['textHighlights'].zoom()
+            meta['areaHighlights'].zoom()
+            meta['screenshots'].zoom()
+            meta['thumbnails'].zoom()
+            meta['readingProgress'].zoom()
+
+            # TODO want to ignore the whold subtree..
+            pi = meta['pageInfo'].zoom()
+            pi['num'].zoom()
+        except Exception as exx:
+            err = self.error(exx, meta)
+            self.logger.exception(err)
+            yield err
+        from pprint import pprint
+        # pprint(notes)
+        # try:
+        #     pm, notes, comm, que, flash, text, area, screens, thumb, rp, pi = zoom(
+        #         meta,
+        #     )
+        # except Exception as exx:
+        #     yield echain(self.err, exx)
+        #     return
+
+        # def aempty(x):
+        #     akeq(x)
+        # try:
+        #     aempty(pm)
+        #     aempty(que)
+        #     aempty(flash)
+        #     aempty(text)
+        #     aempty(area) # TODO these should be yieldy?
+        #     aempty(screens)
+        #     aempty(rp)
+        #     akeq(pi, 'num')
+        # except Exception as ex:
+        #     # TODO make it a method?
+            # yield echain(self.err, ex)
+
+
+        # aempty(notes)
+        # yield Item(self.uid)
+
+
+    def load_items(self, metas) -> Iterator[ResultItem]:
+        from kython.konsume import wrap
+        for p, meta in metas.items():
+            with wrap(meta) as meta:
+                yield from self.load_item(meta)
+
+    def load(self) -> Iterator[ResultBook]:
+        self.logger.info('processing %s', self.path)
+        j = json.loads(self.path.read_text())
+
+        try:
+            di = j['docInfo']
+            filename = di['filename']
+            title = di.get('title', None)
+            tags = di['tags']
+            pm = j['pageMetas']
+        except Exception as ex:
+            self.logger.exception(ex)
+            yield echain(self.err, ex)
+            return
+
+        # TODO should I group by book??? 
+        yield Book(
+            uid=self.uid,
+            filename=filename,
+            title=title,
+            items=list(self.load_items(pm)),
+        )
+        # "textHighlights": {},
+        # "comments": {},
+        # TODO
+        # "pagemarks": {},
+        # "notes": {},
+        # "questions": {},
+        # "flashcards": {},
+        # "areaHighlights": {},
+        # "screenshots": {},
+        # "thumbnails": {},
+        # "readingProgress": {},
+        # "pageInfo": {
+        #   "num": 1
+        # }
+
+
+def iter_entries() -> Iterator[ResultBook]:
+    for d in _get_datas():
+        yield from Loader(d).load()
+
+
+def main():
+    logger = get_logger()
+    setup_logzero(logger, level=logging.DEBUG)
+
+    for entry in iter_entries():
+        logger.info('processed %s', entry.uid)
+        for i in entry.items:
+            try:
+                ii = unwrap(i)
+            except Error as e:
+                logger.exception(e)
+            else:
+                logger.info(ii)
+
+
+if __name__ == '__main__':
+    main()