implement setSpecificValueOfCard for user @TobiasWehrum (#303)

Co-authored-by: thiswillbeyourgithub <github@32mail.33mail.comm>

README.md

@@ -238,6 +238,35 @@ corresponding to when the API was available for use.
     }
     ```
 
+
+*   **setSpecificValueOfCard**
+
+    Sets specific value of a single card. Given the risk of wreaking havor in the database when changing some of the values of a card, some of the keys require the argument "warning_check" set to True.
+    This can be used to set a card's flag, change it's ease factor, change the review order in a filtered deck and change the column "data" (not currently used by anki apparantly), and many other values.
+    A list of values and explanation of their respective utility can be found at [AnkiDroid's wiki](https://github.com/ankidroid/Anki-Android/wiki/Database-Structure).
+
+    *Sample request*:
+    ```json
+    {
+        "action": "setSpecificValueOfCard",
+        "version": 6,
+        "params": {
+            "card": 1483959291685,
+            "keys": ["flags", "odue"],
+            "newValues": ["1", "-100"]
+        }
+    }
+    ```
+
+    *Sample result*:
+    ```json
+    {
+        "result": [true, true],
+        "error": null
+    }
+    ```
+
+
 *   **suspend**
 
     Suspend cards by card ID; returns `true` if successful (at least one card wasn't already suspended) or `false`

plugin/__init__.py

@@ -833,6 +833,38 @@ class AnkiConnect:
 
         return couldSetEaseFactors
 
+    @util.api()
+    def setSpecificValueOfCard(self, card, keys,
+                               newValues, warning_check=False):
+        if isinstance(card, list):
+            print("card has to be int, not list")
+            return False
+
+        if not isinstance(keys, list) or not isinstance(newValues, list):
+            print("keys and newValues have to be lists.")
+            return False
+
+        if len(newValues) != len(keys):
+            print("Invalid list lengths.")
+            return False
+
+        for key in keys:
+            if key in ["did", "id", "ivl", "lapses", "left", "mod", "nid",
+                       "odid", "odue", "ord", "queue", "reps", "type", "usn"]:
+                if warning_check is False:
+                    return False
+
+        result = []
+        try:
+            ankiCard = self.getCard(card)
+            for i, key in enumerate(keys):
+                setattr(ankiCard, key, newValues[i])
+            ankiCard.flush()
+            result.append(True)
+        except Exception as e:
+            result.append([False, str(e)])
+        return result
+
 
     @util.api()
     def getEaseFactors(self, cards):