Add like querying/checking/rendering to Feed posts

- Change runnerspace.live to Runnerspace
- Change post viewing URL to say /post/🆔 instead of /feed/🆔

models.py

@@ -3,6 +3,7 @@ import json
 from typing import List
 
 import humanize
+from flask import url_for
 from flask_login import UserMixin
 from sqlalchemy import func
 
@@ -27,6 +28,9 @@ class User(UserMixin, db.Model):
     posts_liked = db.relationship("PostLike", backref=db.backref('user', lazy='joined'), lazy='dynamic', cascade='all, delete-orphan')
     comments_liked = db.relationship("CommentLike", backref=db.backref('user', lazy='joined'), lazy='dynamic', cascade='all, delete-orphan')
 
+    def get_url(self) -> str:
+        return url_for('main.view_user', username=self.username)
+
     def get_last_seen_text(self) -> str:
         delta: datetime.timedelta = datetime.datetime.utcnow() - self.last_seen
         if delta > MAXIMUM_ONLINE_DELTA:
@@ -70,6 +74,14 @@ class User(UserMixin, db.Model):
     def display_about(self) -> str:
         return self.about_me or "This user hasn't written a bio yet."
 
+    def has_liked_post(self, post_id: int) -> bool:
+        """Check whether a user has liked a given post."""
+        return db.session.query(PostLike.id).filter_by(post_id=post_id, user_id=self.id).first() is not None
+
+    def has_liked_comment(self, comment_id: int) -> bool:
+        """Check whether a user has liked a given post."""
+        return db.session.query(CommentLike.id).filter_by(comment_id=comment_id, user_id=user_id).first() is not None
+
 
 class Post(db.Model):
     id = db.Column(db.Integer, primary_key=True)
@@ -84,6 +96,22 @@ class Post(db.Model):
         delta: datetime.timedelta = datetime.datetime.utcnow() - self.date_posted
         return humanize.naturaldelta(delta)
 
+    def get_like_count(self) -> bool:
+        return PostLike.query.filter_by(post_id=self.id).count()
+
+    def get_like_text(self) -> str:
+        like_count = self.get_like_count()
+        top_likes = PostLike.query.filter_by(post_id=self.id).order_by(PostLike.timestamp.asc()).limit(3)
+        users = [like.user for like in top_likes]
+        names = [f'<a href="{user.get_url()}">{user.name}</a>' for user in users]
+
+        if like_count >= 3: format_string = '{0}, {1} and {2} has liked this post.'
+        elif like_count == 2: format_string = '{0} and {1} has liked this post.'
+        elif like_count == 1: format_string = '{0} has liked this post.'
+        else: format_string = '0 likes'
+
+        return format_string.format(*names)
+
 
 class PostLike(db.Model):
     id = db.Column(db.Integer, primary_key=True)