it works!

main.py

@@ -1,8 +1,9 @@
 #!/usr/bin/env python3
 from mastodon import Mastodon
 import twitter
+import requests
 
-import sqlite3, json, re
+import sqlite3, json, re, random
 
 cfg = {
 	"cw":None,
@@ -16,7 +17,7 @@ try:
 except:
 	print("No config.json, using default configuration")
 
-scopes = ["read:accounts", "write:statuses"]
+scopes = ["read:accounts", "write:statuses", "write:media"]
 
 if "client" not in cfg:
 	print("No application info -- registering application with {}".format(cfg['site']))
@@ -62,18 +63,26 @@ if "accounts" not in cfg:
 	accounts = []
 	while i != "":
 		i = input("User: ")
-		if not re.match("@(\w){1,15}$", i):
+		if not re.match("@(\w){1,16}$", i):
+			if i == "":
+				print("Accounts to learn from: {}".format(", ".join(accounts)))
+				break
 			print("Invalid username")
 			continue
 		if i == "" and len(accounts) == 0:
 			print("You must enter at least one account")
 			continue
 		print("Checking account...")
-		print(api.GetUser(screen_name=i))
-
-
+		try:
+			user = api.GetUser(screen_name=i)
+			accounts.append(i)
+		except:
+			print("Invalid username.")
 
+	print("Saving account list. To choose a different set of accounts, delete the 'accounts' entry in config.json.")
+	cfg['accounts'] = accounts
 
+	json.dump(cfg, open("config.json", "w+"))
 
 # connect to database
 
@@ -81,11 +90,33 @@ db = sqlite3.connect("tip.db")
 db.text_factory=str
 c = db.cursor()
 
-c.execute("CREATE TABLE IF NOT EXISTS `images` (post_id INT NOT NULL UNIQUE PRIMARY KEY, user_id INT NOT NULL, image_url VARCHAR) WITHOUT ROWID")
+c.execute("CREATE TABLE IF NOT EXISTS `images` (post_id INT NOT NULL UNIQUE PRIMARY KEY, screen_name VARCHAR NOT NULL, image_urls VARCHAR, count INT DEFAULT 0) WITHOUT ROWID")
 db.commit()
-last_tweet = c.execute("SELECT post_id FROM `images` WHERE user_id LIKE ? ORDER BY post_id DESC LIMIT 1", (f.id,)).fetchone()
 
-print("Downloading tweets from {}".format())
+for acct in cfg['accounts']:
+	last_tweet = c.execute("SELECT post_id FROM `images` WHERE screen_name LIKE ? ORDER BY post_id DESC LIMIT 1", (acct,)).fetchone()
+	if last_tweet != None:
+		last_tweet = last_tweet[0]
+	else:
+		last_tweet = 0 # start from the first one
+	print("Downloading tweets from account {}, starting from {}".format(acct, last_tweet))
+	
+	while True:
+
+		tl = api.GetUserTimeline(screen_name = acct, since_id = last_tweet, exclude_replies = True, include_rts = False, count = 200, trim_user = True)
+		if len(tl) == 0:
+			# we've reached the end of this user's timeline
+			break
+		for tweet in tl:
+			media_urls = []
+			if tweet.media != None:
+				for media in tweet.media:
+					media_urls.append(media.media_url)
+			c.execute("INSERT INTO `images` (screen_name, post_id, image_urls) VALUES (?, ?, ?)", (acct, tweet.id_str, ",".join(media_urls)))
+
+		last_tweet = c.execute("SELECT post_id FROM `images` WHERE screen_name LIKE ? ORDER BY post_id DESC LIMIT 1", (acct,)).fetchone()[0]
+		print(last_tweet)
+	db.commit()
 
 client = Mastodon(
 	client_id=cfg['client']['id'],
@@ -93,4 +124,17 @@ client = Mastodon(
 	access_token=cfg['secret'], 
 	api_base_url=cfg['site'])
 
+base_count = c.execute("SELECT MIN(count) FROM images").fetchone()[0]
+# base_count gets the lowest post count from the table.
+# for example, if image A and B have already been posted once, and image C has never been posted, it'll return 0.
+# this lets us filter for images that haven't been posted yet in this "generation".
+
+chosen_tweet = c.execute("SELECT post_id, image_urls FROM images WHERE count = ? AND image_urls NOT LIKE '' ORDER BY RANDOM() LIMIT 1", (base_count,)).fetchone()
+image = random.choice(chosen_tweet[1].split(","))
+filename = re.match(r".*\/(.*)", image).group(1)
+# save image to disk
+open(filename, 'wb').write(requests.get(image).content)
+# post!
+media = client.media_post(filename, description="Image downloaded from Twitter account {}".format(acct))
+client.status_post("Source: https://twitter.com/{}/status/{}".format(acct, chosen_tweet[0]), media_ids=media)
 

requirements.txt

@@ -1,2 +1,3 @@
-Mastodon.py==1.3.1
+Mastodon.py==1.4.0
 python-twitter==3.5
+requests==2.21.0