File Structure

We receive random files from random people on the Internet, so they are treated with extreme care.

The HPR Database is used to track the status of each show as it is been processed, using a normally hidden table reservations. It is not publicly available as it contains the IP address of the host uploading the show as a security measure. Once the show is processed the IP address is removed from the table.

Information about the show process is available to the Janitors via stats.php.

A cron job */15 * * * * /home/hpr/bin/update-stats.bash > /dev/null 2>&1 runs every 15 minutes and saves the file to https://hub.hackerpublicradio.org/stats.json for anyone to use.

Input Directory Structure

The files are never processed by the front end HPR servers, and so all processing is done offline.

The files are downloaded by trusted Janitors that have the ability to scp/rsync the files from the HPR to a local machine for processing.

The directory structure is based on a combination of fields separated by the underscore (_) delimiter.

Upload date and time UTC_TIMESTAMP() at reservation time.
The requested episode number or 9999 if the reserve queue is to be used.
The requested epidode date or 1970-01-01 if the reserve queue is to be used.
The random unique key for this request.

2339594445_9278_2044-02-24_aeb0579fcac318005d7550a60fd60403676c24d94148b
2339680845_9999_1970-01-01_4bd713699e5bc0978d5fef85a60f09bc7f70ef3488624

Shows destined for the reserve queue are moved from the upload directory and placed in the reserve directory using the script rename-reserve.bash.

This is run manually by the Janitors as it checks to see if a url to the show was provided, and attempts to download the linked file. When new hosts submit a show directly to the reserve queue, the Janitors will resubmit it to the first available slot in the normal queue. This is because new hosts need to have an entry created in the hosts table, but also because it gives the community an opportunity to welcome the new host.

It renames the directory structure based on a combination of fields separated by the underscore (_) delimiter.

Upload date and time UTC_TIMESTAMP() at reservation time.
The hosts.hostid of the host.
The random unique key for this request.
The host name hosts.host of the host.
The spaces replaced with underscore title of the episode.

2339680845_987_4bd713699e5bc0978d5fef85a60f09bc7f70ef3488624_Emperor_Ming_Top_tips_for_time_travel

Reserve shows are downloaded and submitted by the Janitors on behalf of the host. This follows the normal posting process where the host and Janitors are cc'd on the notification emails. The only difference is that the audio is edited to include a notification that the show is from the reserve queue, and that it is the Janitors that upload the show via the supplied link.

Show Processing

Adding the host to the `hosts` table

This is currently added manually by the Janitors, as the text to speech tools often requires manipulation to get it sounding correct.

The hosts email address with the `@` replaced with `.nospam@nospam.` as an antispam measure

Field	Description	Example
hostid	Automatically generated incrementing number.	987
host	The name or handle of the host.	Emperor Ming
email		Emperor.Ming.nospam@nospam.example.com
profile	A html host profile	<p>Follow me Mastodon: <a rel="me" href="https://mastodon.example.org/@Emperor.Ming">@Emperor.Ming@mastodon.example.org</a></p>
license	One of the allowed licenses	CC-BY-SA
local_image	If a avatar is available directly from the host.	1
gpg	We can verify the hosts emails, with [thought to automatically verify](HPR/hpr-tools#4).	1C7398B00F0239E8
valid	Allows temporary de-listing of host	0
espeak_name	The text to speech version of the name or handle.	Fifty One Fifty

Host Images/Avatars, can either be:

Local Images uploaded when the host submits or ~~edits~~ their profile.

Gravatar Images downloaded periodically by the Janitors and copied to the file store on the origin server.

Default Images added by hpr_generator when the host has no other image.

All the images are currently stored in the hpr_generator repository, and get transferred to the server using hpr-publish.bash.

Adding the episode to the `eps` table

The script postshow.bash is run locally on the Janitors computer. It calls the HPR CMS script status.php to return a tab separated list of the shows in the queue.

timestamp_epoc	ep_num	ep_date	key	status	email
2339594445	9278	2044-02-24	aeb0579fcac318005d7550a60fd60403676c24d94148b	SHOW_SUBMITTED	joe.blogg.nospam@nospam.example.com
2339680845	9999	1970-01-01	4bd713699e5bc0978d5fef85a60f09bc7f70ef3488624	RESERVE_SHOW_SUBMITTED	Emperor.Ming.nospam@nospam.example.com

It selects the first show with a status of SHOW_SUBMITTED and uses rsync to clone the directory locally. It then parses the shownotes.json file and extracts the shownotes object to a new file shownotes.html.

All embedded images are saved as local image files, with the format hpr${ep_num}_${image_count} based on "episode number", a underscore as delimiter, and then a sequential number of the image in the notes. eg hpr9876_1.jpg.

Where they are images larger than 400 pixels wide, a thumbnail is created with the same image name but suffixed with _tn. eg hpr9876_1_tn.jpg.

The Janitors then review the shownotes for issues.

The duration will be extracted from the media, and the other metadata from the shownotes.json file. After some checks it will be URL encoded.

The script allows overwriting of any value in the json file from the command line, and also prevents posting from a new host that has not yet been assigned a entry in the hosts table.

Once all the checks are done the

Output Directory Structure

It should be possible to ship the entire backlog on physical media to someone, and have them plug it in and for any media player be able to play it. Each episode has it's own "album" which corresponds to a directory. The directory structure is kept as flat as possible with everything related to show eg: 9876 in a single directory hpr9876. This is the least common denominator, and in no way precludes web services, or other applications.

We do however need to support other functionality so the Episodes are kept inside of the eps directory, the Hosts are in hosts/, and Series are in series/.

Layers

We get files from different locations. The source files are delivered by the hosts, some are generated by processing, and others are added by the Janitors that cleanup the show notes.

All these are combined and end up as a complete entity, on one of the HPR Origin servers.

From there is delivered made available via RSS, etc.

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