Add pydantic to dataclasses

Verifies the type annotations on the classes.

This commit also fixes a bug where an invalid type was returned for
suggestions of a Tag. The return type was a dict of a Micro Tag
Structure but it was expected to be a string (see szurubooru.py)

Signed-off-by: Colin Wilk <colin.wilk@tum.de>

4 files changed, 155 insertions, 5 deletions

diff --git a/poetry.lock b/poetry.lock
index ee6dd46..8d564a7 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -27,6 +27,17 @@ about-time = "4.2.1"
 grapheme = "0.6.0"
 
 [[package]]
+name = "annotated-types"
+version = "0.5.0"
+description = "Reusable constraint types to use with typing.Annotated"
+optional = false
+python-versions = ">=3.7"
+files = [
+    {file = "annotated_types-0.5.0-py3-none-any.whl", hash = "sha256:58da39888f92c276ad970249761ebea80ba544b77acddaa1a4d6cf78287d45fd"},
+    {file = "annotated_types-0.5.0.tar.gz", hash = "sha256:47cdc3490d9ac1506ce92c7aaa76c579dc3509ff11e098fc867e5130ab7be802"},
+]
+
+[[package]]
 name = "attrs"
 version = "23.1.0"
 description = "Classes Without Boilerplate"
@@ -410,6 +421,143 @@ files = [
 ]
 
 [[package]]
+name = "pydantic"
+version = "2.4.2"
+description = "Data validation using Python type hints"
+optional = false
+python-versions = ">=3.7"
+files = [
+    {file = "pydantic-2.4.2-py3-none-any.whl", hash = "sha256:bc3ddf669d234f4220e6e1c4d96b061abe0998185a8d7855c0126782b7abc8c1"},
+    {file = "pydantic-2.4.2.tar.gz", hash = "sha256:94f336138093a5d7f426aac732dcfe7ab4eb4da243c88f891d65deb4a2556ee7"},
+]
+
+[package.dependencies]
+annotated-types = ">=0.4.0"
+pydantic-core = "2.10.1"
+typing-extensions = ">=4.6.1"
+
+[package.extras]
+email = ["email-validator (>=2.0.0)"]
+
+[[package]]
+name = "pydantic-core"
+version = "2.10.1"
+description = ""
+optional = false
+python-versions = ">=3.7"
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+    {file = "pydantic_core-2.10.1.tar.gz", hash = "sha256:0f8682dbdd2f67f8e1edddcbffcc29f60a6182b4901c367fc8c1c40d30bb0a82"},
+]
+
+[package.dependencies]
+typing-extensions = ">=4.6.0,<4.7.0 || >4.7.0"
+
+[[package]]
 name = "pydot"
 version = "1.4.2"
 description = "Python interface to Graphviz's Dot"
@@ -624,4 +772,4 @@ zstd = ["zstandard (>=0.18.0)"]
 [metadata]
 lock-version = "2.0"
 python-versions = "^3.10"
-content-hash = "78a50e8d0a5cb2728d647eca54966752205aff54c3ab2610d643ce90a220c47a"
+content-hash = "71d329202935e4a3c2a302a6bd4ce6d91f74f1fcbb28605d360753c5888d076a"
diff --git a/pyproject.toml b/pyproject.toml
index 077a683..8b25550 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -11,6 +11,7 @@ pybooru = "^4.2.2"
 alive-progress = "^3.1.4"
 colorama = "^0.4.6"
 python-dotenv = "^1.0.0"
+pydantic = "^2.4.2"
 
 [tool.poetry.group.dev.dependencies]
 pytype = "^2023.9.27"
diff --git a/src/lib/dataclasses.py b/src/lib/dataclasses.py
index 16413b7..6313fca 100644
--- a/src/lib/dataclasses.py
+++ b/src/lib/dataclasses.py
@@ -3,8 +3,9 @@ Module for collection of dataclasses that map Szurubooru objects to python class
 """
 
 
-from dataclasses import dataclass, field
-from typing import List
+from pydantic.dataclasses import dataclass
+from dataclasses import field
+from typing import List, Optional
 
 
 @dataclass
@@ -40,7 +41,7 @@ class Tag:
 
     name: str
     version: int = -1
-    description: str = ""
+    description: Optional[str] = ""
     category: str = "General"
     implications: List[str] = field(default_factory=list)
     suggestions: List[str] = field(default_factory=list)
diff --git a/src/lib/szurubooru.py b/src/lib/szurubooru.py
index 1219cfb..38c6265 100644
--- a/src/lib/szurubooru.py
+++ b/src/lib/szurubooru.py
@@ -533,7 +533,7 @@ class Szurubooru:
             category=c["category"],
             description=c["description"],
             implications=list(map(lambda a: a["names"][0], c["implications"])),
-            suggestions=c["suggestions"],
+            suggestions=list(map(lambda a: a["names"][0], c["suggestions"])),
         )
 
     def tag_exists(self, name: str) -> bool: