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Pagination #15

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7341b9c
Implemented Pagination
GeorgeApos Jun 18, 2026
a041e9a
Fix Ruff failure in validate-and-package workflow
Copilot Jun 19, 2026
9724114
Implemented consistent font family on pagination widget
GeorgeApos Jul 1, 2026
4d10610
Implemented consistent font family in pagination widget
GeorgeApos Jul 1, 2026
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207 changes: 109 additions & 98 deletions database.py
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Original file line number Diff line number Diff line change
Expand Up @@ -20,36 +20,16 @@ def __init__(self, database_path: Path | None = None):
def create_tables(self) -> None:
self.connection.execute(
"""
CREATE TABLE IF NOT EXISTS articles
(
id
INTEGER
PRIMARY
KEY
AUTOINCREMENT,
university
TEXT
NOT
NULL,
title
TEXT
NOT
NULL,
summary
TEXT,
link
TEXT
NOT
NULL
UNIQUE,
published
TEXT,
fetched_at
TEXT
NOT
NULL,
image_url
TEXT
CREATE TABLE IF NOT EXISTS articles (
id INTEGER PRIMARY KEY AUTOINCREMENT,
university TEXT NOT NULL,
source TEXT,
title TEXT NOT NULL,
summary TEXT,
link TEXT NOT NULL UNIQUE,
published TEXT,
fetched_at TEXT NOT NULL,
image_url TEXT
);
"""
)
Expand All @@ -69,8 +49,7 @@ def create_tables(self) -> None:

def save_article(self, article: dict) -> None:
query = """
INSERT \
OR IGNORE INTO articles (
INSERT OR IGNORE INTO articles (
university,
source,
title,
Expand All @@ -80,8 +59,8 @@ def save_article(self, article: dict) -> None:
fetched_at,
image_url
)
VALUES (?, ?, ?, ?, ?, ?, ?, ?); \
"""
VALUES (?, ?, ?, ?, ?, ?, ?, ?);
"""

self.connection.execute(
query,
Expand All @@ -103,103 +82,132 @@ def save_articles(self, articles: list[dict]) -> None:
for article in articles:
self.save_article(article)

def get_articles(
self,
university=None,
source=None,
search_text=None,
limit: int = 500,
) -> list[dict]:
query = """
SELECT
id,
university,
source,
title,
summary,
link,
published,
fetched_at,
image_url
FROM articles
WHERE 1 = 1 \
"""

def build_article_filters(
self,
university=None,
source=None,
search_text=None,
) -> tuple[str, list]:
filters = ["1 = 1"]
params = []

if university and university != "All":
query += " AND university = ?"
filters.append("university = ?")
params.append(university)

if source and source != "All":
query += " AND source = ?"
filters.append("source = ?")
params.append(source)

if university and university != "All":
query += " AND university = ?"
params.append(university)

if search_text:
query += """
AND (
title LIKE ?
OR summary LIKE ?
OR university LIKE ?
filters.append(
"""
(
title LIKE ?
OR summary LIKE ?
OR university LIKE ?
OR source LIKE ?
)
"""
)
"""
search_pattern = f"%{search_text}%"
params.extend([search_pattern, search_pattern, search_pattern])
params.extend(
[
search_pattern,
search_pattern,
search_pattern,
search_pattern,
]
)

return " AND ".join(filters), params

def get_articles(
self,
university=None,
source=None,
search_text=None,
limit: int = 12,
offset: int = 0,
) -> list[dict]:
where_clause, params = self.build_article_filters(
university=university,
source=source,
search_text=search_text,
)

query += """
query = f"""
SELECT
id,
university,
source,
title,
summary,
link,
published,
fetched_at,
image_url
FROM articles
WHERE {where_clause}
ORDER BY id DESC
LIMIT ?
OFFSET ?;
"""

params.append(limit)
params.extend([limit, offset])

cursor = self.connection.execute(query, params)
rows = cursor.fetchall()

return [dict(row) for row in rows]

def count_articles(
self,
university=None,
source=None,
search_text=None,
) -> int:
where_clause, params = self.build_article_filters(
university=university,
source=source,
search_text=search_text,
)

query = f"""
SELECT COUNT(*) AS total
FROM articles
WHERE {where_clause};
"""

cursor = self.connection.execute(query, params)
row = cursor.fetchone()

return row["total"] if row else 0

def delete_all_articles(self) -> None:
self.connection.execute("DELETE FROM articles;")
self.connection.commit()

def close(self) -> None:
self.connection.close()

def enforce_article_limit(self, max_articles: int) -> None:
query = """
DELETE \
FROM articles
WHERE id NOT IN (SELECT id \
FROM articles \
ORDER BY id DESC
LIMIT ?
); \
"""
DELETE FROM articles
WHERE id NOT IN (
SELECT id
FROM articles
ORDER BY id DESC
LIMIT ?
);
"""

self.connection.execute(query, (max_articles,))
self.connection.commit()

def load_cached_articles(self):
try:
self.articles = self.database.get_articles()
except Exception as error:
print(f"Could not load cached articles: {error}")
self.articles = []
self.selected_university = "All"
self.search_text = ""

self.render_articles()

def get_universities(self) -> list[str]:
query = """
SELECT DISTINCT university
FROM articles
ORDER BY university ASC;
"""
SELECT DISTINCT university
FROM articles
ORDER BY university ASC;
"""

cursor = self.connection.execute(query)
rows = cursor.fetchall()
Expand All @@ -217,4 +225,7 @@ def get_sources_for_university(self, university: str) -> list[str]:
(university,),
)

return [row["source"] for row in cursor.fetchall() if row["source"]]
return [row["source"] for row in cursor.fetchall() if row["source"]]

def close(self) -> None:
self.connection.close()
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