Clojurians Log v2
portal
Hi,
So I tried to add metadata to JSON requests to Portal /submit endpoint, so that Portal Viewers can be specified even with JSON encoding, and got something hacky working for my use-case (sending JSON Vega-Lite specs from C++)
https://github.com/ALevitskyy/portal/pull/1
The problems I encountered:
1. Metadata being thrown away when JSON-encoding -> Solution: Encode all values with metadata as {meta_ metadata, data_ value}
2. Some metadata has keywords as values -> Solution: Convert each keyword as string and prepend "__portal__runtime__json__keyword__" to them
Problems with my approach
1. Slower encoding-decoding: currently the parser walks input JSON 3 times when decoding to convert all the keys and values
2. Need to add weird additional keys and substrings to JSON (easily automated on client though)
When I send the JSON below, the Portal automatically selects Vega-Lite viewer:
"{\"portal.runtime.json\\/meta__\":{\"portal.viewer\\/default\":\"__portal__runtime__json__keyword__portal.viewer\\/vega-lite\"},
\"portal.runtime.json\\/data__\": {\"$schema\":\"
\"data\":{
\"values\":[
{\"category\":\"A\",\"value\":28},
{\"category\":\"B\",\"value\":55},
{\"category\":\"C\",\"value\":43},
{\"category\":\"D\",\"value\":91},
{\"category\":\"E\",\"value\":81}
]
},
\"mark\":\"bar\",
\"encoding\":{
\"x\":{\"field\":\"category\",\"type\":\"nominal\",\"axis\":{\"labelAngle\":0}},
\"y\":{\"field\":\"value\",\"type\":\"quantitative\"}
}
}}"