From: Christian Heller <c.heller@plomlompom.de>
Date: Fri, 19 Apr 2024 04:46:11 +0000 (+0200)
Subject: Refactor VersionedAttributes, ProcessSteps, and Conditions retrieval.
X-Git-Url: https://plomlompom.com/repos/%7B%7B%20web_path%20%7D%7D/index.html?a=commitdiff_plain;h=7adcf651f0053f0dc5d719457a016a0d5b12253b;p=plomtask

Refactor VersionedAttributes, ProcessSteps, and Conditions retrieval.
---

diff --git a/plomtask/conditions.py b/plomtask/conditions.py
index 98a0b99..b87e3ac 100644
--- a/plomtask/conditions.py
+++ b/plomtask/conditions.py
@@ -25,14 +25,10 @@ class Condition(BaseModel):
         """Build condition from row, including VersionedAttributes."""
         condition = super().from_table_row(db_conn, row)
         assert isinstance(condition, Condition)
-        for title_row in db_conn.exec('SELECT * FROM condition_titles '
-                                      'WHERE parent = ?', (row[0],)):
-            condition.title.history[title_row[1]]\
-                    = title_row[2]  # pylint: disable=no-member
-        for desc_row in db_conn.exec('SELECT * FROM condition_descriptions '
-                                     'WHERE parent = ?', (row[0],)):
-            condition.description.history[desc_row[1]]\
-                    = desc_row[2]  # pylint: disable=no-member
+        for name in ('title', 'description'):
+            table_name = f'condition_{name}s'
+            for row_ in db_conn.all_where(table_name, 'parent', row[0]):
+                getattr(condition, name).history_from_row(row_)
         return condition
 
     @classmethod
diff --git a/plomtask/db.py b/plomtask/db.py
index bf633e2..f45d2b6 100644
--- a/plomtask/db.py
+++ b/plomtask/db.py
@@ -76,6 +76,11 @@ class DatabaseConnection:
             q_marks = self.__class__.q_marks_from_values(values)
             self.exec(f'INSERT INTO {table_name} VALUES {q_marks}', values)
 
+    def all_where(self, table_name: str, key: str, target: int) -> list[Row]:
+        """Return list of Rows at table where key == target."""
+        return list(self.exec(f'SELECT * FROM {table_name} WHERE {key} = ?',
+                              (target,)))
+
     @staticmethod
     def q_marks_from_values(values: tuple[Any]) -> str:
         """Return placeholder to insert values into SQL code."""
diff --git a/plomtask/misc.py b/plomtask/misc.py
index efa8898..5759c0d 100644
--- a/plomtask/misc.py
+++ b/plomtask/misc.py
@@ -1,6 +1,7 @@
 """Attributes whose values are recorded as a timestamped history."""
 from datetime import datetime
 from typing import Any
+from sqlite3 import Row
 from plomtask.db import DatabaseConnection
 
 
@@ -32,6 +33,10 @@ class VersionedAttribute:
                 or value != self.history[self._newest_timestamp]:
             self.history[datetime.now().strftime('%Y-%m-%d %H:%M:%S')] = value
 
+    def history_from_row(self, row: Row) -> None:
+        """Extend self.history from expected table row format."""
+        self.history[row[1]] = row[2]
+
     def at(self, queried_time: str) -> str | float:
         """Retrieve value of timestamp nearest queried_time from the past."""
         sorted_timestamps = sorted(self.history.keys())
diff --git a/plomtask/processes.py b/plomtask/processes.py
index a3682c5..e5851d0 100644
--- a/plomtask/processes.py
+++ b/plomtask/processes.py
@@ -47,28 +47,20 @@ class Process(BaseModel):
             if not create:
                 raise NotFoundException(f'Process not found of id: {id_}')
             process = Process(id_)
-        for row in db_conn.exec('SELECT * FROM process_titles '
-                                'WHERE parent = ?', (process.id_,)):
-            process.title.history[row[1]] = row[2]
-        for row in db_conn.exec('SELECT * FROM process_descriptions '
-                                'WHERE parent = ?', (process.id_,)):
-            process.description.history[row[1]] = row[2]
-        for row in db_conn.exec('SELECT * FROM process_efforts '
-                                'WHERE parent = ?', (process.id_,)):
-            process.effort.history[row[1]] = row[2]
-        for row in db_conn.exec('SELECT * FROM process_steps '
-                                'WHERE owner = ?', (process.id_,)):
-            process.explicit_steps += [ProcessStep.from_table_row(db_conn,
-                                                                  row)]
-        for row in db_conn.exec('SELECT condition FROM process_conditions '
-                                'WHERE process = ?', (process.id_,)):
-            process.conditions += [Condition.by_id(db_conn, row[0])]
-        for row in db_conn.exec('SELECT condition FROM process_fulfills '
-                                'WHERE process = ?', (process.id_,)):
-            process.fulfills += [Condition.by_id(db_conn, row[0])]
-        for row in db_conn.exec('SELECT condition FROM process_undoes '
-                                'WHERE process = ?', (process.id_,)):
-            process.undoes += [Condition.by_id(db_conn, row[0])]
+        if isinstance(process.id_, int):
+            for name in ('title', 'description', 'effort'):
+                table = f'process_{name}s'
+                for row in db_conn.all_where(table, 'parent', process.id_):
+                    getattr(process, name).history_from_row(row)
+            for row in db_conn.all_where('process_steps', 'owner',
+                                         process.id_):
+                step = ProcessStep.from_table_row(db_conn, row)
+                process.explicit_steps += [step]
+            for name in ('conditions', 'fulfills', 'undoes'):
+                table = f'process_{name}'
+                for row in db_conn.all_where(table, 'process', process.id_):
+                    target = getattr(process, name)
+                    target += [Condition.by_id(db_conn, row[1])]
         assert isinstance(process, Process)
         return process