diff --git a/db/database.py b/db/database.py
index 80cf5b3..30b8f34 100644
--- a/db/database.py
+++ b/db/database.py
@@ -110,7 +110,7 @@ class PostgresConnector:
                 row["source"],
                 row.get("topic"),
                 row.get("topic_confidence"),
-                Json(row["ner_entities"]) if row.get("ner_entities") else None,
+                Json(row["entities"]) if row.get("entities") else None,
                 row.get("emotion_anger"),
                 row.get("emotion_disgust"),
                 row.get("emotion_fear"),
diff --git a/server/app.py b/server/app.py
index b3830a3..eef9d7a 100644
--- a/server/app.py
+++ b/server/app.py
@@ -1,4 +1,5 @@
 import os
+import datetime
 
 from dotenv import load_dotenv
 from flask import Flask, jsonify, request
@@ -15,6 +16,7 @@ from server.stat_gen import StatGen
 from server.dataset_processor import DatasetProcessor
 from db.database import PostgresConnector
 from server.auth import AuthManager
+from server.utils import get_request_filters, parse_datetime_filter
 
 import pandas as pd
 import traceback
@@ -42,7 +44,6 @@ auth_manager = AuthManager(db, bcrypt)
 
 stat_gen = StatGen()
 
-
 @app.route("/register", methods=["POST"])
 def register_user():
     data = request.get_json()
@@ -112,7 +113,7 @@ def upload_data():
     post_file = request.files["posts"]
     topic_file = request.files["topics"]
 
-    if post_file.filename == "" or topic_file == "":
+    if post_file.filename == "" or topic_file.filename == "":
         return jsonify({"error": "Empty filename"}), 400
 
     if not post_file.filename.endswith(".jsonl") or not topic_file.filename.endswith(
@@ -136,7 +137,11 @@ def upload_data():
         db.save_dataset_content(dataset_id, enriched_df)
 
         return jsonify(
-            {"message": "File uploaded successfully", "event_count": len(enriched_df), "dataset_id": dataset_id}
+            {
+                "message": "File uploaded successfully",
+                "event_count": len(enriched_df),
+                "dataset_id": dataset_id,
+            }
         ), 200
     except ValueError as e:
         return jsonify({"error": f"Failed to read JSONL file: {str(e)}"}), 400
@@ -158,7 +163,8 @@ def get_dataset(dataset_id):
     if dataset_content.empty:
         return jsonify({"error": "Dataset content not found"}), 404
 
-    return jsonify(dataset_content.to_dict(orient="records")), 200
+    filters = get_request_filters()
+    return jsonify(stat_gen.filter_dataset(dataset_content, filters)), 200
 
 
 @app.route("/dataset/<int:dataset_id>/content", methods=["GET"])
@@ -172,7 +178,8 @@ def content_endpoint(dataset_id):
 
     dataset_content = db.get_dataset_content(dataset_id)
     try:
-        return jsonify(stat_gen.get_content_analysis(dataset_content)), 200
+        filters = get_request_filters()
+        return jsonify(stat_gen.get_content_analysis(dataset_content, filters)), 200
     except ValueError as e:
         return jsonify({"error": f"Malformed or missing data: {str(e)}"}), 400
     except Exception as e:
@@ -192,7 +199,8 @@ def get_summary(dataset_id):
     dataset_content = db.get_dataset_content(dataset_id)
 
     try:
-        return jsonify(stat_gen.summary(dataset_content)), 200
+        filters = get_request_filters()
+        return jsonify(stat_gen.summary(dataset_content, filters)), 200
     except ValueError as e:
         return jsonify({"error": f"Malformed or missing data: {str(e)}"}), 400
     except Exception as e:
@@ -212,7 +220,8 @@ def get_time_analysis(dataset_id):
     dataset_content = db.get_dataset_content(dataset_id)
 
     try:
-        return jsonify(stat_gen.get_time_analysis(dataset_content)), 200
+        filters = get_request_filters()
+        return jsonify(stat_gen.get_time_analysis(dataset_content, filters)), 200
     except ValueError as e:
         return jsonify({"error": f"Malformed or missing data: {str(e)}"}), 400
     except Exception as e:
@@ -232,7 +241,8 @@ def get_user_analysis(dataset_id):
     dataset_content = db.get_dataset_content(dataset_id)
 
     try:
-        return jsonify(stat_gen.get_user_analysis(dataset_content)), 200
+        filters = get_request_filters()
+        return jsonify(stat_gen.get_user_analysis(dataset_content, filters)), 200
     except ValueError as e:
         return jsonify({"error": f"Malformed or missing data: {str(e)}"}), 400
     except Exception as e:
@@ -252,7 +262,8 @@ def get_cultural_analysis(dataset_id):
     dataset_content = db.get_dataset_content(dataset_id)
 
     try:
-        return jsonify(stat_gen.get_cultural_analysis(dataset_content)), 200
+        filters = get_request_filters()
+        return jsonify(stat_gen.get_cultural_analysis(dataset_content, filters)), 200
     except ValueError as e:
         return jsonify({"error": f"Malformed or missing data: {str(e)}"}), 400
     except Exception as e:
@@ -272,84 +283,15 @@ def get_interaction_analysis(dataset_id):
     dataset_content = db.get_dataset_content(dataset_id)
 
     try:
-        return jsonify(stat_gen.get_interactional_analysis(dataset_content)), 200
+        filters = get_request_filters()
+        return jsonify(
+            stat_gen.get_interactional_analysis(dataset_content, filters)
+        ), 200
     except ValueError as e:
         return jsonify({"error": f"Malformed or missing data: {str(e)}"}), 400
     except Exception as e:
         print(traceback.format_exc())
         return jsonify({"error": f"An unexpected error occurred: {str(e)}"}), 500
 
-
-# @app.route("/filter/query", methods=["POST"])
-# def filter_query():
-#     if stat_obj is None:
-#         return jsonify({"error": "No data uploaded"}), 400
-
-#     data = request.get_json(silent=True) or {}
-
-#     if "query" not in data:
-#         return jsonify(stat_obj.df.to_dict(orient="records")), 200
-
-#     query = data["query"]
-#     filtered_df = stat_obj.filter_by_query(query)
-
-#     return jsonify(filtered_df), 200
-
-
-# @app.route("/filter/time", methods=["POST"])
-# def filter_time():
-#     if stat_obj is None:
-#         return jsonify({"error": "No data uploaded"}), 400
-
-#     data = request.get_json(silent=True)
-#     if not data:
-#         return jsonify({"error": "Invalid or missing JSON body"}), 400
-
-#     if "start" not in data or "end" not in data:
-#         return jsonify({"error": "Please include both start and end dates"}), 400
-
-#     try:
-#         start = pd.to_datetime(data["start"], utc=True)
-#         end = pd.to_datetime(data["end"], utc=True)
-#         filtered_df = stat_obj.set_time_range(start, end)
-#         return jsonify(filtered_df), 200
-#     except Exception:
-#         return jsonify({"error": "Invalid datetime format"}), 400
-
-
-# @app.route("/filter/sources", methods=["POST"])
-# def filter_sources():
-#     if stat_obj is None:
-#         return jsonify({"error": "No data uploaded"}), 400
-
-#     data = request.get_json(silent=True)
-#     if not data:
-#         return jsonify({"error": "Invalid or missing JSON body"}), 400
-
-#     if "sources" not in data:
-#         return jsonify({"error": "Ensure sources hash map is in 'sources' key"}), 400
-
-#     try:
-#         filtered_df = stat_obj.filter_data_sources(data["sources"])
-#         return jsonify(filtered_df), 200
-#     except ValueError:
-#         return jsonify({"error": "Please enable at least one data source"}), 400
-#     except Exception as e:
-#         return jsonify({"error": "An unexpected server error occured: " + str(e)}), 500
-
-
-# @app.route("/filter/reset", methods=["GET"])
-# def reset_dataset():
-#     if stat_obj is None:
-#         return jsonify({"error": "No data uploaded"}), 400
-
-#     try:
-#         stat_obj.reset_dataset()
-#         return jsonify({"success": "Dataset successfully reset"})
-#     except Exception as e:
-#         print(traceback.format_exc())
-#         return jsonify({"error": f"An unexpected error occurred: {str(e)}"}), 500
-
-
 if __name__ == "__main__":
     app.run(debug=True)
diff --git a/server/stat_gen.py b/server/stat_gen.py
index dc748d0..2ea5ac1 100644
--- a/server/stat_gen.py
+++ b/server/stat_gen.py
@@ -39,97 +39,139 @@ class StatGen:
         self.linguistic_analysis = LinguisticAnalysis(EXCLUDE_WORDS)
         self.cultural_analysis = CulturalAnalysis()
 
-    def get_time_analysis(self, df: pd.DataFrame) -> dict:
+    ## Private Methods
+    def _prepare_filtered_df(self, 
+                             df: pd.DataFrame, 
+                             filters: dict | None = None
+                             ) -> pd.DataFrame:
+        filters = filters or {}
+        filtered_df = df.copy()
+
+        search_query = filters.get("search_query", None)
+        start_date_filter = filters.get("start_date", None)
+        end_date_filter = filters.get("end_date", None)
+        data_source_filter = filters.get("data_sources", None)
+
+        if search_query:
+            mask = (
+                filtered_df["content"].str.contains(search_query, case=False, na=False)
+                | filtered_df["author"].str.contains(search_query, case=False, na=False)
+            )
+
+            # Only include title if the column exists
+            if "title" in filtered_df.columns:
+                mask = mask | filtered_df["title"].str.contains(
+                    search_query, case=False, na=False, regex=False
+                )
+
+            filtered_df = filtered_df[mask]
+
+        if start_date_filter:
+            filtered_df = filtered_df[(filtered_df["dt"] >= start_date_filter)]
+
+        if end_date_filter:
+            filtered_df = filtered_df[(filtered_df["dt"] <= end_date_filter)]
+
+        if data_source_filter:
+            filtered_df = filtered_df[filtered_df["source"].isin(data_source_filter)]
+
+        return filtered_df
+
+    ## Public Methods
+    def filter_dataset(self, df: pd.DataFrame, filters: dict | None = None) -> dict:
+        return self._prepare_filtered_df(df, filters).to_dict(orient="records")
+
+    def get_time_analysis(self, df: pd.DataFrame, filters: dict | None = None) -> dict:
+        filtered_df = self._prepare_filtered_df(df, filters)
+
         return {
-            "events_per_day": self.temporal_analysis.posts_per_day(df),
-            "weekday_hour_heatmap": self.temporal_analysis.heatmap(df),
+            "events_per_day": self.temporal_analysis.posts_per_day(filtered_df),
+            "weekday_hour_heatmap": self.temporal_analysis.heatmap(filtered_df),
         }
 
-    def get_content_analysis(self, df: pd.DataFrame) -> dict:
+    def get_content_analysis(self, df: pd.DataFrame, filters: dict | None = None) -> dict:
+        filtered_df = self._prepare_filtered_df(df, filters)
+
         return {
-            "word_frequencies": self.linguistic_analysis.word_frequencies(df),
-            "common_two_phrases": self.linguistic_analysis.ngrams(df),
-            "common_three_phrases": self.linguistic_analysis.ngrams(df, n=3),
-            "average_emotion_by_topic": self.emotional_analysis.avg_emotion_by_topic(df),
-            "reply_time_by_emotion": self.temporal_analysis.avg_reply_time_per_emotion(df),
+            "word_frequencies": self.linguistic_analysis.word_frequencies(filtered_df),
+            "common_two_phrases": self.linguistic_analysis.ngrams(filtered_df),
+            "common_three_phrases": self.linguistic_analysis.ngrams(filtered_df, n=3),
+            "average_emotion_by_topic": self.emotional_analysis.avg_emotion_by_topic(
+                filtered_df
+            ),
+            "reply_time_by_emotion": self.temporal_analysis.avg_reply_time_per_emotion(
+                filtered_df
+            ),
         }
 
-    def get_user_analysis(self, df: pd.DataFrame) -> dict:
+    def get_user_analysis(self, df: pd.DataFrame, filters: dict | None = None) -> dict:
+        filtered_df = self._prepare_filtered_df(df, filters)
+
         return {
-            "top_users": self.interaction_analysis.top_users(df),
-            "users": self.interaction_analysis.per_user_analysis(df),
-            "interaction_graph": self.interaction_analysis.interaction_graph(df),
+            "top_users": self.interaction_analysis.top_users(filtered_df),
+            "users": self.interaction_analysis.per_user_analysis(filtered_df),
+            "interaction_graph": self.interaction_analysis.interaction_graph(
+                filtered_df
+            ),
         }
 
-    def get_interactional_analysis(self, df: pd.DataFrame) -> dict:
+    def get_interactional_analysis(self, df: pd.DataFrame, filters: dict | None = None) -> dict:
+        filtered_df = self._prepare_filtered_df(df, filters)
+
         return {
-            "average_thread_depth": self.interaction_analysis.average_thread_depth(df),
-            "average_thread_length_by_emotion": self.interaction_analysis.average_thread_length_by_emotion(df),
+            "average_thread_depth": self.interaction_analysis.average_thread_depth(
+                filtered_df
+            ),
+            "average_thread_length_by_emotion": self.interaction_analysis.average_thread_length_by_emotion(
+                filtered_df
+            ),
         }
 
-    def get_cultural_analysis(self, df: pd.DataFrame) -> dict:
+    def get_cultural_analysis(self, df: pd.DataFrame, filters: dict | None = None) -> dict:
+        filtered_df = self._prepare_filtered_df(df, filters)
+
         return {
-            "identity_markers": self.cultural_analysis.get_identity_markers(df),
-            "stance_markers": self.cultural_analysis.get_stance_markers(df),
-            "entity_salience": self.cultural_analysis.get_avg_emotions_per_entity(df),
+            "identity_markers": self.cultural_analysis.get_identity_markers(
+                filtered_df
+            ),
+            "stance_markers": self.cultural_analysis.get_stance_markers(filtered_df),
+            "entity_salience": self.cultural_analysis.get_avg_emotions_per_entity(
+                filtered_df
+            ),
         }
 
-    def summary(self, df: pd.DataFrame) -> dict:
-        total_posts = (df["type"] == "post").sum()
-        total_comments = (df["type"] == "comment").sum()
-        events_per_user = df.groupby("author").size()
+    def summary(self, df: pd.DataFrame, filters: dict | None = None) -> dict:
+        filtered_df = self._prepare_filtered_df(df, filters)
+
+        total_posts = (filtered_df["type"] == "post").sum()
+        total_comments = (filtered_df["type"] == "comment").sum()
+        events_per_user = filtered_df.groupby("author").size()
+
+        if filtered_df.empty:
+            return {
+                "total_events": 0,
+                "total_posts": 0,
+                "total_comments": 0,
+                "unique_users": 0,
+                "comments_per_post": 0,
+                "lurker_ratio": 0,
+                "time_range": {
+                    "start": None,
+                    "end": None,
+                },
+                "sources": [],
+            }
 
         return {
-            "total_events": int(len(df)),
+            "total_events": int(len(filtered_df)),
             "total_posts": int(total_posts),
             "total_comments": int(total_comments),
             "unique_users": int(events_per_user.count()),
             "comments_per_post": round(total_comments / max(total_posts, 1), 2),
             "lurker_ratio": round((events_per_user == 1).mean(), 2),
             "time_range": {
-                "start": int(df["dt"].min().timestamp()),
-                "end": int(df["dt"].max().timestamp()),
+                "start": int(filtered_df["dt"].min().timestamp()),
+                "end": int(filtered_df["dt"].max().timestamp()),
             },
-            "sources": df["source"].dropna().unique().tolist(),
+            "sources": filtered_df["source"].dropna().unique().tolist(),
         }
-
-    # def filter_by_query(self, df: pd.DataFrame, search_query: str) -> dict:
-    #     filtered_df = df[df["content"].str.contains(search_query, na=False)]
-
-    #     return {
-    #         "rows": len(filtered_df),
-    #         "data": filtered_df.to_dict(orient="records"),
-    #     }
-
-    # def set_time_range(
-    #     self,
-    #     original_df: pd.DataFrame,
-    #     start: datetime.datetime,
-    #     end: datetime.datetime,
-    # ) -> dict:
-    #     df = self._prepare_df(original_df)
-    #     filtered_df = df[(df["dt"] >= start) & (df["dt"] <= end)]
-
-    #     return {
-    #         "rows": len(filtered_df),
-    #         "data": filtered_df.to_dict(orient="records"),
-    #     }
-
-    # def filter_data_sources(
-    #     self, original_df: pd.DataFrame, data_sources: dict
-    # ) -> dict:
-    #     df = self._prepare_df(original_df)
-    #     enabled_sources = [src for src, enabled in data_sources.items() if enabled]
-
-    #     if not enabled_sources:
-    #         raise ValueError("Please choose at least one data source")
-
-    #     filtered_df = df[df["source"].isin(enabled_sources)]
-
-    #     return {
-    #         "rows": len(filtered_df),
-    #         "data": filtered_df.to_dict(orient="records"),
-    #     }
-
-    # def reset_dataset(self, original_df: pd.DataFrame) -> pd.DataFrame:
-    #     return self._prepare_df(original_df)
diff --git a/server/utils.py b/server/utils.py
new file mode 100644
index 0000000..078d1e7
--- /dev/null
+++ b/server/utils.py
@@ -0,0 +1,50 @@
+import datetime
+from flask import request
+
+def parse_datetime_filter(value):
+    if not value:
+        return None
+
+    try:
+        return datetime.datetime.fromisoformat(value)
+    except ValueError:
+        try:
+            return datetime.datetime.fromtimestamp(float(value))
+        except ValueError as err:
+            raise ValueError(
+                "Date filters must be ISO-8601 strings or Unix timestamps"
+            ) from err
+
+
+def get_request_filters() -> dict:
+    filters = {}
+
+    search_query = request.args.get("search_query") or request.args.get("query")
+    if search_query:
+        filters["search_query"] = search_query
+
+    start_date = parse_datetime_filter(
+        request.args.get("start_date") or request.args.get("start")
+    )
+    if start_date:
+        filters["start_date"] = start_date
+
+    end_date = parse_datetime_filter(
+        request.args.get("end_date") or request.args.get("end")
+    )
+    if end_date:
+        filters["end_date"] = end_date
+
+    data_sources = request.args.getlist("data_sources")
+    if not data_sources:
+        data_sources = request.args.getlist("sources")
+
+    if len(data_sources) == 1 and "," in data_sources[0]:
+        data_sources = [
+            source.strip() for source in data_sources[0].split(",") if source.strip()
+        ]
+
+    if data_sources:
+        filters["data_sources"] = data_sources
+
+    return filters
\ No newline at end of file