From b2d0a727d2f9393ff602492fab17c2fa53adf4df Mon Sep 17 00:00:00 2001
From: "WQY\\qiong" <qiongyu.wang@outlook.com>
Date: Thu, 17 Nov 2022 18:33:49 +0800
Subject: [PATCH] Parse [LABELS]

---
 api/s26_labels.py | 37 +++++++++++++++++++++++++++++++++++--
 1 file changed, 35 insertions(+), 2 deletions(-)

diff --git a/api/s26_labels.py b/api/s26_labels.py
index af5d01d..8f3ea81 100644
--- a/api/s26_labels.py
+++ b/api/s26_labels.py
@@ -95,5 +95,38 @@ def delete_label_cache(name: str, cs: ChangeSet) -> SqlChangeSet:
     return SqlChangeSet(redo_sql, undo_sql, redo_cs, undo_cs)
 
 
-def delete_label(name: str, cs: ChangeSet) -> ChangeSet:
-    return execute_command(name, delete_label_cache(name, cs))
+class InpLabel:
+    def __init__(self, line: str) -> None:
+        tokens = line.split()
+
+        num = len(tokens)
+        has_desc = tokens[-1].startswith(';')
+        num_without_desc = (num - 1) if has_desc else num
+
+        self.x = float(tokens[0])
+        self.y = float(tokens[1])
+        self.label = str(tokens[2])
+        self.node = str(tokens[3]) if num >= 4 else None
+
+
+def inp_in_label(section: list[str]) -> ChangeSet:
+    cs = ChangeSet()
+    for s in section:
+        # skip comment
+        if s.startswith(';'):
+            continue
+        obj = InpLabel(s)
+        cs.append({'operation': API_ADD, 'type': 'label', 'x': obj.x, 'y': obj.y, 'label': obj.label, 'node': obj.node})
+    return cs
+
+
+def inp_out_label(name: str) -> list[str]:
+    lines = []
+    objs = read_all(name, 'select * from labels')
+    for obj in objs:
+        x = obj['x']
+        y = obj['y']
+        label = obj['label']
+        node = obj['node'] if obj['node'] != None else ''
+        lines.append(f'{x} {y} {label} {node}')
+    return lines