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MSC2997: Add t-shirt #2997

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57334d8
feat: add proposal
Sorunome Feb 7, 2021
73658da
fix MSC number
Sorunome Feb 7, 2021
4d6c2f3
add event suggestion
Sorunome Feb 18, 2021
72e979b
add t-shirts-as-rooms
Sorunome Feb 18, 2021
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39 changes: 39 additions & 0 deletions proposals/2997-tshift.md
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# MSC2997: "There's an MSC for that!"
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@MTRNord MTRNord Oct 1, 2022 •
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Mostly for visual reference based on the current MSC state. :) Not finished in the slightest, and more a 15m photoshop adventure than anything else. But maybe it helps future readers to visualize some ideas on this MSC.

Fonts used are roboto mono regular and "Maybe Next" Regular.

Front


Throughout fosdem 2021 multiple different features or ideas around matrix were discussed. As it turns
out, most of them already had an MSC for that! One feature that was keep being brought up, was to get
"There's an MSC for that!" onto a t-shirt. Unfortunately, there wasn't an MSC for that yet.

## Proposal

Get a t-shirt with "There's an MSC for that!" written on it. This T-shirt shall include a code block
typeset in a monospace block that should read
Comment on lines +9 to +10
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Suggested change
Get a t-shirt with "There's an MSC for that!" written on it. This T-shirt shall include a code block
typeset in a monospace block that should read
Get a t-shirt. This T-shirt shall include a code block typeset in a monospace block that should read

```json
{
"type": "m.t-shirt",
"content": {
"body": "There's an MSC for that!"
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Should body in this case actually be the user? T-shirts are generally most useful on the user's body

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As @uhoreg pointed out here it might be a plan that, moving forward, any event should have a fallback body to display.

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My suggestion is simply that the t-shirt will be more useful if the body in question were to be the user's body instead of some arbitrary text.

Properly serialising the end user may however prove to be a significant implementation challenge

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Oooh, do you mean like this?

{
  "type": "m.t-shirt",
  "content": {
    "body": "@sorunome:sorunome.de"
  }
}

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That's a medical stuff, so it's probably depending on us to spec HL7 FHIR resource state events. ^_^

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Maybe we should make it a state event, then? Since state_keys starting with @ are preserved so that they only can be set by the user themself and not by others.

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Yes! And the content is quite obvious.
https://www.hl7.org/fhir/genomics.html

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@kate-shine kate-shine Feb 18, 2021 •
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On the other hand, I'm quite worried that the serialization of user would require a space of t-shirt-as-rooms

}
}
Comment on lines +12 to +17
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@HarHarLinks HarHarLinks Aug 15, 2023 •
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A POC implementation was done for CCCamp23!

The following constitutes the backend implementation

Suggested change
{
"type": "m.t-shirt",
"content": {
"body": "There's an MSC for that!"
}
}
{
"type": "m.t-shirt",
"content": {
"body": "There's an MSC for that!",
"background": "$bgcolor",
"text-color": "$fgcolor",
"size": "$size",
"fitted": $fitted,
"frontend.logo": $logo,
"backend.highlight": $highlight
},
"origin_server_ts": $timestamp
}

where

  • bgcolor is the shirt's color, in this case #000000
  • fgcolor is the frontend print's color, in this case #FFFFFF
  • size is the T-shirt size in T-Shirt sizes, we used S, M, L, XL, XXL, XXXL
  • optionally, fitted indicates whether it's a fitted T-shirt (boolean)
  • logo is whether the frontend depicts the [matrix] logo (boolean), in this case true
  • highlight is whether the backend implementation uses syntax highlighting (boolean), in this case true
  • timestamp is the creation or event start, in this case 1692049320000

Full event as implemented by us:

{
  "type": "de.sorunome.t-shirt",
  "org.matrix.msc2997.content": {
    "body": "There's an MSC for that!",
    "background": "#000000",
    "text-color": "#FFFFFF",
    "size": "M",
    "fitted": true,
    "frontend.logo": true,
    "backend.highlight": true
  },
  "origin_server_ts": 1692049320000
}

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(gratz @Sorunome, you're eternalised in a couple T-shirts now.... 🎉)

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(implementation accepted - MSC description updated)

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@HarHarLinks HarHarLinks Sep 24, 2023 •
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We iterated for Matrix Community Summit 2023!
It is based on the extensible events for media and by extension, files.
content contains 3 blocks:

  • Like the media extensible events, there is the m.text fallback block in case your t-shirt manufacturer is unable to reproduce the graphic given by the file.
  • The m.file block holds some common properties
  • The m.t-shirt block (unstable prefix org.matrix.msc2997.t-shirt) specifies some t-shirt specific details

Some details of the event metadata are not shown in the backend for comprehensiveness.

Suggested change
{
"type": "m.t-shirt",
"content": {
"body": "There's an MSC for that!"
}
}
{
"type": "de.sorunome.t-shirt",
"sender": "$sender_mxid",
"content": {
"m.text": [
{ "body": "There's an MSC for that!" }
],
"m.file": {
"url": "mxc://$some_url",
"name": "$url_label",
"mimetype": "$mime",
"size": "$size"
},
"org.matrix.msc2997.t-shirt": {
"background": "$bgcolor",
"text-color": "$fgcolor",
"fitted": $fitted,
"frontend.logo": $logo
"backend.highlight": $highlight
}
},
"origin_server_ts": $event_start
}

where:

  • sender_mxid per https://spec.matrix.org/latest/client-server-api/#room-event-format
  • some_url a url in the format of https://spec.matrix.org/latest/client-server-api/#matrix-content-mxc-uris that coincidentally also works when using it with the HTTP(s) protocol instead of MXC - we used mxc://summit2023.matrixmeetup.de/conference
  • mime the material of the shirt, in this case t-shirt/cotton
  • size is the T-shirt size in T-Shirt sizes, we used S, M, L, XL, XXL, up to 5XL
  • bgcolor is the shirt's color, in this case #000000
  • fgcolor is the frontend print's color, in this case #FFFFFF (only relevant if the fallback text is used)
  • optionally, fitted indicates whether it's a fitted T-shirt (boolean) - our implementation lists it explicitly even if false
  • logo is whether the frontend depicts the graphic indicated by the m.file.url (boolean), in this case true
  • highlight is whether the backend implementation uses syntax highlighting (boolean), in this case true
  • timestamp is the creation or event start, in this case 1695283200000

Full event as implemented by us:

{
  "type": "de.sorunome.t-shirt",
  "sender": "@me:homeserver.tld",
  "content": {
    "m.text": [
      { "body": "There's an MSC for that!" }
    ],
    "m.file": {
      "url": "mxc://matrixmeetup.de/summit2023",
      "name": "Matrix Community Summit 2023",
      "mimetype": "t-shirt/cotton",
      "size": "L"
    },
    "org.matrix.msc2997.t-shirt": {
      "background": "#000000",
      "text-color": "#FFFFFF",
      "fitted": true,
      "frontend.logo": true,
      "backend.highlight": true
    }
  },
  "origin_server_ts": 1695283200000
}

```
## Potential issues

Once the spec is complete and there are no more MSCs the t-shirt will be obsolete.
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Suggested change
Once the spec is complete and there are no more MSCs the t-shirt will be obsolete.
Once the spec is complete and there are no more MSCs the t-shirt will be obsolete. That's unlikely to happen anytime soon though.

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Suggested change
Once the spec is complete and there are no more MSCs the t-shirt will be obsolete.
Once the spec is complete and there are no more MSCs the t-shirt will be obsolete.
That is never going to happen, though.


## Alternatives

Instead of a shirt, a sweater or thelike could be used.
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It seems shirts have not been considered which I find quite sad since I am a regular user of them


Instead of just printing normal event contents on the shirt we might want to consider using
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While the increased flexibility for metadata would be useful, specific care should be given to the sizing implementation. Smaller users may have issues with the fit of a room based t-shirt

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It could allow us to have not only "One size fits all" t-shirts, but also "One size fits many" - at once!

t-shirts-as-rooms. This would allow greater flexibility, as we could easily add any amount of metadata
to the t-shirt in the future, such as the amount of times it has been washed or what temperature to
iron it at.

## Security considerations

Unfortunately not all people are able to wear t-shirts, so a solution for those would have to be
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what about wristbands with text for them?

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This is a fair point, though I'm not sure if it would mitigate the security that a t-shirt provides. For one, the surface area of a t-shirt far outweighs that of a wristband. Wristbands can also be made from a variety of materials, some even opting for mere paper.

Not to mention the lack of area for displaying the intended messaging of the MSC.

I think if wristbands is taken as an approach, care should be taken to ensure the security and practicality of the device.

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What about a hat? Or similar headware? It is more visible than a wristband and everyone that is affected by MSC tends to have a head. Or do we also want to integrate aliens via a bridge end expect headless users?

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What about capes? Almost everyone has a neck and you can make them pretty big to put arbitrary messages on them. Would need to come with a disclaimer not to wear them next to aircrafts though.

found.

## Unstable prefix

In places where this proposal mentions `t-shirt`, `de.sorunome.t-shirt` is to be used instead