Update README.md

Author: Wolfyxon

README.md

@@ -10,7 +10,8 @@ The following projects can gather the stats:
 You can also make your own project that will do that. See the format specification below.
 
 ## Data format
-This is an example stat file:
+### Unprocessed stats JSON (the stats file)
+Ungroupped unprocessed stats. Made to be human readable and for quick modification.
 
 ```json
 {
@@ -24,3 +25,33 @@ This is an example stat file:
    ]
 }
 ```
+
+- `formatVersion`: (number) Numeric version of the file structure. Made for distinguishing the versions and converting them in case the format changes in future.
+- `songs`: (SongData[]) An array of songs
+> SongData
+> - `title`: (string) Title of the song
+> - `artist`: (string) Name of the artist
+> - `totalPlays`: (number) Total number of plays 
+
+### Processed stats JSON (encoded in URL as Base64)
+Processed, almost ready to display stats. Meant to take less space when more data is present. 
+Artists and songs that don't qualify for display are not included.
+
+- `artists`: (ArtistData[]) Array of artists
+> ArtistData
+> - `name`: (string) Name of the artist
+> - `totalPlays`: (number) Number
+- - `songs`: (StrippedSongData[]) Array of songs
+> StrippedSongData
+> - `title`: (string) Title of the song
+> - `artist`: (number) Index of the song's artist
+> - `totalPlays`: (number) Total amount of plays
+- `songCount`: (number) Total number of songs a user has listened to
+- `artistCount`: (number) Total number of artists a user has listened to
+
+### URL format
+`https://wolfyxon.github.io/SongWrap/?s=<base64 processed stats JSON>`
+
+Example:
+
+https://wolfyxon.github.io/SongWrap/?s=eyJzb25ncyI6W3sidGl0bGUiOiJCZWhvbGQgdGhlIHNrZWxldG9uIiwiYXJ0aXN0IjoiS2Fyb2xldXNQTCIsInRvdGFsUGxheXMiOjQyfSx7InRpdGxlIjoiR2lmdGlnIiwiYXJ0aXN0IjoiUmFtbXN0ZWluIiwidG90YWxQbGF5cyI6MzV9LHsidGl0bGUiOiJBbiBBYnNlbmNlIiwiYXJ0aXN0IjoiSGVhdmVuIFBpZXJjZSBIZXIiLCJ0b3RhbFBsYXlzIjozMH0seyJ0aXRsZSI6IkJJRyBTSE9UIiwiYXJ0aXN0IjoiVG9ieSBGb3giLCJ0b3RhbFBsYXlzIjoxN31dLCJhcnRpc3RzIjpbeyJuYW1lIjoiS2Fyb2xldXNQTCIsInRvdGFsUGxheXMiOjU3fSx7Im5hbWUiOiJSYW1tc3RlaW4iLCJ0b3RhbFBsYXlzIjo1N30seyJuYW1lIjoiSGVhdmVuIFBpZXJjZSBIZXIiLCJ0b3RhbFBsYXlzIjo0Nn1dLCJ0b3BBcnRpc3RzIjpbMCwxLDJdLCJ0b3BTb25ncyI6WzAsMSwyLDNdLCJzb25nQ291bnQiOjIyLCJhcnRpc3RDb3VudCI6MTR9