create endpoint for downloading all data

[zbryikt]

add url like /channel/xxx/all.json to get all formatted data in xxx channel

[godfat]

Since we're storing data in redis lists, named with: "irclog:channel:##{channel}:#{date}", that means we're grouping with channel and date, there might not have an easy way to extract all data for a given channel.

We either:

• Scan over a time period
• Migrate the data to hash based
• Add additional data for this query

Ideally, using hash might be simpler, but then we need to migrate the data.

[dannvix]

Another possible approach – provide a public link to the Redis RDB persistence (i.e. dump.rdb) and provide a script to extract logs of specified channel from the file. However, this might exhaust the network transfer quota :P

[caasi]

FYI: @kiang creates a repo to fetch all logs in JSON: https://github.com/g0v/logbot-logs