From c6bd8d8556ebee910bb6afe7bdedb05fe81446ac Mon Sep 17 00:00:00 2001
From: John Doty <john@d0ty.me>
Date: Mon, 22 Jul 2024 16:20:22 -0700
Subject: [PATCH] Start reconcile

---
 cry/cli.py      | 32 ++++++++++++++++++++++++++++++++
 cry/database.py | 31 ++++++++++++++++++++++++++++---
 2 files changed, 60 insertions(+), 3 deletions(-)

diff --git a/cry/cli.py b/cry/cli.py
index 6bb988b..9a93c30 100644
--- a/cry/cli.py
+++ b/cry/cli.py
@@ -248,3 +248,35 @@ def unsubscribe(url):
 @cli.command("serve")
 def serve():
     web.serve()
+
+
+@cli.command("reconcile")
+def reconcile():
+    local_db = database.Database.local()
+    local_version = local_db.get_property("version", 0)
+    for p in database.databases_directory().glob("*.db"):
+        if not p.is_file():
+            continue
+
+        try:
+            other_db = database.Database.from_file(p)
+            if local_db.origin == other_db.origin:
+                continue
+
+            other_version = other_db.get_property("version", 0)
+            if other_version != local_version:
+                click.echo(
+                    f"{other_db.origin}: Not reconciling version {other_version} against {local_version}"
+                )
+                continue
+
+            # TODO: GET CLOCK OF BOTH.
+            other_clock = other_db.get_clock()
+            reconciled_clock = local_db.get_reconcile_clock(other_db.origin)
+            if other_clock == reconciled_clock:
+                continue
+
+            # TODO: RECONCILE FOR REALS
+
+        except Exception as e:
+            click.echo(f"Error loading {p}: {e}")
diff --git a/cry/database.py b/cry/database.py
index 4e5a934..138a831 100644
--- a/cry/database.py
+++ b/cry/database.py
@@ -99,6 +99,12 @@ SCHEMA_STATEMENTS = [
       UPDATE properties SET value=value + 1 WHERE name='clock';
     END;
     """,
+    """
+    CREATE TABLE reconcile_status (
+      origin VARCHAR NOT NULL PRIMARY KEY,
+      clock INT NOT NULL
+    );
+    """,
 ]
 
 
@@ -129,8 +135,12 @@ def local_origin(path: pathlib.Path | None = None) -> str:
     return origin
 
 
+def databases_directory() -> pathlib.Path:
+    return pathlib.Path.home() / "Dropbox" / "cry"
+
+
 def database_path(origin: str) -> pathlib.Path:
-    return pathlib.Path.home() / "Dropbox" / "cry" / f"{origin}.db"
+    return databases_directory() / f"{origin}.db"
 
 
 # TODO: Refactor into:
@@ -141,13 +151,18 @@ class Database:
     db: sqlite3.Connection
     origin: str
 
-    def __init__(self, path: pathlib.Path | str, origin: str):
+    def __init__(self, path: pathlib.Path | str, origin: str, readonly: bool = False):
+        uri = False
         if not isinstance(path, str):
             path.parent.mkdir(parents=True, exist_ok=True)
+            path = f"file:{str(path)}"
+            uri = True
+            if readonly:
+                path = f"{path}?mode=ro"
 
         # Enable autocommit as a separate step so that I can enable foreign
         # keys cleanly. (Can't enable foreign keys in a transaction.)
-        db = sqlite3.Connection(str(path))
+        db = sqlite3.connect(str(path), uri=uri)
         db.execute("PRAGMA foreign_keys = ON")
         db.autocommit = False
 
@@ -165,6 +180,16 @@ class Database:
 
         db = Database(database_path(origin), origin)
         db.ensure_database_schema()
+        db.set_property("origin", origin)
+        return db
+
+    @classmethod
+    def from_file(cls, path: pathlib.Path) -> "Database":
+        db = Database(path, "", readonly=True)
+        origin = db.get_property("origin")
+        if origin is None:
+            raise Exception("No origin!")
+        db.origin = str(origin)
         return db
 
     def get_property(self, prop: str, default=None) -> typing.Any: