raise_diarch_opinion_with_loyalty_update_effect

raise_diarch_opinion_with_loyalty_update_effect = {
	# Check the current opinion.
	diarch = {
		save_opinion_value_as = {
			name = diarch_old_opinion
			target = prev
		}
	}
	# Plus, save $OPINION_AMOUNT$ so that we can use it in subsequent script values.
	save_scope_value_as = {
		name = opinion_amount
		value = $OPINION_AMOUNT$
	}
	# Process the loyalty update tooltip.
	diarch = {
		# Self-interested.
		## Hates you too much to be able to tell.
		if = {
			limit = {
				diarch_loyalty <= diarch_loyalty_visibly_disloyal_threshold
				scope:diarch_old_opinion <= -100
				scope:opinion_amount >= 1
			}
			liege = { custom_tooltip = raise_diarch_opinion_with_loyalty_update_effect.tt.self_interested.overflow_edgecase }
		}
		### Since save_opinion_value_as doesn't account for overspill past -100, and as we've got some special conditions that make the move from -100 to -99 very dramatic under certain circumstances, we need to have this vague option to cover up systemic inaccuracies.
		## Self-interested remains static.
		else_if = {
			limit = {
				diarch_loyalty <= diarch_loyalty_visibly_disloyal_threshold
				raise_diarch_opinion_with_loyalty_update_value <= diarch_loyalty_visibly_disloyal_threshold
			}
			liege = { custom_tooltip = raise_diarch_opinion_with_loyalty_update_effect.tt.self_interested.remains_static }
		}
		## Self-interested to selfless.
		else_if = {
			limit = {
				diarch_loyalty <= diarch_loyalty_visibly_disloyal_threshold
				raise_diarch_opinion_with_loyalty_update_value >= diarch_loyalty_visibly_loyal_threshold
			}
			liege = { custom_tooltip = raise_diarch_opinion_with_loyalty_update_effect.tt.self_interested.to_selfless }
		}
		## Self-interested to situational.
		else_if = {
			limit = { diarch_loyalty <= diarch_loyalty_visibly_disloyal_threshold }
			liege = { custom_tooltip = raise_diarch_opinion_with_loyalty_update_effect.tt.self_interested.to_situational }
		}
		# Situational.
		## Situational to selfless.
		else_if = {
			limit = {
				diarch_has_situational_loyalty_trigger = yes
				raise_diarch_opinion_with_loyalty_update_value >= diarch_loyalty_visibly_loyal_threshold
			}
			liege = { custom_tooltip = raise_diarch_opinion_with_loyalty_update_effect.tt.situational.to_selfless }
		}
		## Situational to self-interested.
		else_if = {
			limit = {
				diarch_has_situational_loyalty_trigger = yes
				raise_diarch_opinion_with_loyalty_update_value <= diarch_loyalty_visibly_disloyal_threshold
			}
			liege = { custom_tooltip = raise_diarch_opinion_with_loyalty_update_effect.tt.situational.to_self_interested }
		}
		## Situational remains static.
		else_if = {
			limit = { diarch_has_situational_loyalty_trigger = yes }
			liege = { custom_tooltip = raise_diarch_opinion_with_loyalty_update_effect.tt.situational.remains_static }
		}
		# Selfless.
		## Is too loyal to be able to tell.
		else_if = {
			limit = {
				diarch_loyalty >= diarch_loyalty_visibly_loyal_threshold
				scope:diarch_old_opinion >= 100
				scope:opinion_amount <= -1
			}
			liege = { custom_tooltip = raise_diarch_opinion_with_loyalty_update_effect.tt.selfless.overflow_edgecase }
		}
		### As above, we need this vague option to account for overspill.
		## Selfless remains static.
		else_if = {
			limit = {
				diarch_loyalty >= diarch_loyalty_visibly_loyal_threshold
				raise_diarch_opinion_with_loyalty_update_value >= diarch_loyalty_visibly_loyal_threshold
			}
			liege = { custom_tooltip = raise_diarch_opinion_with_loyalty_update_effect.tt.selfless.remains_static }
		}
		## Selfless to self-interested.
		else_if = {
			limit = {
				diarch_loyalty >= diarch_loyalty_visibly_loyal_threshold
				raise_diarch_opinion_with_loyalty_update_value <= diarch_loyalty_visibly_disloyal_threshold
			}
			liege = { custom_tooltip = raise_diarch_opinion_with_loyalty_update_effect.tt.selfless.to_self_interested }
		}
		## Selfless to situational.
		else_if = {
			limit = { diarch_loyalty >= diarch_loyalty_visibly_loyal_threshold }
			liege = { custom_tooltip = raise_diarch_opinion_with_loyalty_update_effect.tt.selfless.to_situational }
		}
	}
	# Now, add the new opinion.
	reverse_add_opinion = {
		target = diarch
		modifier = $OPINION_TYPE$
		opinion = scope:opinion_amount
	}
}

As written in game/common/scripted_effects/00_diarchy_scripted_effects.txt.