Feature request: Support "<for every [-1] [Happiness]>"

[AutumnPizazz]

Before creating

• This is NOT a gameplay feature from Civ VI, BNW, or outside - see Roadmap
• This is NOT a gameplay feature from Vanilla Civ V or from G&K - If so, it should be a comment in Missing features from Civ V - G&K #4697

Problem Description

I hope to add a tiered Unhappiness modifier to my mod, such as:

        "[-15]% growth [in all cities] <for every [-1] [Happiness]> <when below [0] Happiness>",
        "[-10]% [Production] <for every [-1] [Happiness]> <when below [0] Happiness>",
        "[-3]% Strength <for [All] units> <for every [-1] [Happiness]> <when below [0] Happiness>",

However, this is not taking effect.

Related Issue Links

No response

Desired Solution

See above.

Alternative Approaches

See above.

Additional Context

No response

[yairm210]

This is definitely a #3242 request, and not one I'm happy about. This means every time happiness changes, we now need to recompute bloody everything. I'm vetoing this

[yairm210]

I'm sure you can hack this (custom resource, global uniques for resource when happiness == / lower than), but I'm not making this a properly supported unique