Merge pull request #43 from fireform-core/1-feat-create-frontend-api-to-connect-frontend-and-backend-for-form-templates

## Implement core API structure and database management

Author: juanalvv

.gitignore

@@ -1,4 +1,5 @@
-src/__pycache__
+**/__pycache__/
 .idea
 venv
 .venv
+*.db

api/__init__.py

@@ -0,0 +1,13 @@
+from sqlmodel import create_engine, Session
+
+DATABASE_URL = "sqlite:///./fireform.db"
+
+engine = create_engine(
+    DATABASE_URL,
+    echo=True,
+    connect_args={"check_same_thread": False},
+)
+
+def get_session():
+    with Session(engine) as session:
+        yield session

api/db/__init__.py

@@ -0,0 +1,9 @@
+from sqlmodel import SQLModel
+from api.db.database import engine
+from api.db import models
+
+def init_db():
+    SQLModel.metadata.create_all(engine)
+
+if __name__ == "__main__":
+    init_db()

api/db/database.py

@@ -0,0 +1,18 @@
+from sqlmodel import SQLModel, Field
+from sqlalchemy import Column, JSON
+from datetime import datetime
+
+class Template(SQLModel, table=True):
+    id: int | None = Field(default=None, primary_key=True)
+    name: str
+    fields: dict = Field(sa_column=Column(JSON))
+    pdf_path: str
+    created_at: datetime = Field(default_factory=datetime.utcnow)
+
+
+class FormSubmission(SQLModel, table=True):
+    id: int | None = Field(default=None, primary_key=True)
+    template_id: int
+    input_text: str
+    output_pdf_path: str
+    created_at: datetime = Field(default_factory=datetime.utcnow)

api/db/init_db.py

@@ -0,0 +1,19 @@
+from sqlmodel import Session, select
+from api.db.models import Template, FormSubmission
+
+# Templates
+def create_template(session: Session, template: Template) -> Template:
+    session.add(template)
+    session.commit()
+    session.refresh(template)
+    return template
+
+def get_template(session: Session, template_id: int) -> Template | None:
+    return session.get(Template, template_id)
+
+# Forms
+def create_form(session: Session, form: FormSubmission) -> FormSubmission:
+    session.add(form)
+    session.commit()
+    session.refresh(form)
+    return form

api/db/models.py

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+from api.db.database import get_session
+
+def get_db():
+    yield from get_session()

api/db/repositories.py

@@ -0,0 +1,4 @@
+class AppError(Exception):
+    def __init__(self, message: str, status_code: int = 400):
+        self.message = message
+        self.status_code = status_code