Mod declarative compatibility - a little more (#10751)

* Mod compatibility - update declarations

* Mod compatibility - logic and UI changes

* Mod compatibility - flag some invalid use patterns

* RulesetValidator - lint until Studio shuts up

* Fix isBaseRuleset test in ModRequires validation

---------

Co-authored-by: Yair Morgenstern <yairm210@hotmail.com>

android/assets/Skin.json

@@ -179,6 +179,14 @@
             "name": "Checkbox-pressed",
             "color": "color"
         },
+        "checkbox-disabled-c": {
+            "name": "Checkbox",
+            "color": "disabled"
+        },
+        "checkbox-pressed-disabled-c": {
+            "name": "Checkbox-pressed",
+            "color": "disabled"
+        },
         "list-c": {
             "name": "RectangleWithOutline",
             "color": "color"
@@ -258,7 +266,9 @@
     "com.badlogic.gdx.scenes.scene2d.ui.CheckBox$CheckBoxStyle": {
         "default": {
             "checkboxOn": "checkbox-pressed-c",
+            "checkboxOnDisabled": "checkbox-pressed-disabled-c",
             "checkboxOff": "checkbox-c",
+            "checkboxOffDisabled": "checkbox-disabled-c",
             "font": "button",
             "fontColor": "color",
             "downFontColor": "pressed",

core/src/com/unciv/models/ruleset/unique/UniqueParameterType.kt

@@ -572,7 +572,7 @@ enum class UniqueParameterType(
         override fun getTranslationWriterStringsForOutput() = knownValues
     },
 
-    /** Mod declarative compatibility: Behaves like [Unknown], but makes for nicer auto-generated documentation. */
+    /** Mod declarative compatibility: Define Mod relations by their name. */
     ModName("modFilter", "DeCiv Redux", """A Mod name, case-sensitive _or_ a simple wildcard filter beginning and ending in an Asterisk, case-insensitive""", "Mod name filter") {
         override fun getErrorSeverity(parameterText: String, ruleset: Ruleset):
             UniqueType.UniqueParameterErrorSeverity? =

core/src/com/unciv/models/ruleset/unique/UniqueType.kt

@@ -795,8 +795,14 @@ enum class UniqueType(
     Comment("Comment [comment]", *UniqueTarget.Displayable,
         docDescription = "Allows displaying arbitrary text in a Unique listing. Only the text within the '[]' brackets will be displayed, the rest serves to allow Ruleset validation to recognize the intent."),
 
-    // Declarative Mod compatibility (so far rudimentary):
+    // Declarative Mod compatibility (see [ModCompatibility]):
-    ModIncompatibleWith("Mod is incompatible with [modFilter]", UniqueTarget.ModOptions),
+    // Note there is currently no display for these, but UniqueFlag.HiddenToUsers is not set.
+    // That means we auto-template and ask our translators for a translation that is currently unused.
+    //todo To think over - leave as is for future use or remove templates and translations by adding the flag?
+    ModIncompatibleWith("Mod is incompatible with [modFilter]", UniqueTarget.ModOptions,
+        docDescription = "Specifies that your Mod is incompatible with another. Always treated symmetrically, and cannot be overridden by the Mod you are declaring as incompatible."),
+    ModRequires("Mod requires [modFilter]", UniqueTarget.ModOptions,
+        docDescription = "Specifies that your Extension Mod is only available if any other Mod matching the filter is active."),
     ModIsAudioVisualOnly("Should only be used as permanent audiovisual mod", UniqueTarget.ModOptions),
     ModIsAudioVisual("Can be used as permanent audiovisual mod", UniqueTarget.ModOptions),
     ModIsNotAudioVisual("Cannot be used as permanent audiovisual mod", UniqueTarget.ModOptions),

core/src/com/unciv/models/ruleset/validation/ModCompatibility.kt

@@ -0,0 +1,119 @@
+package com.unciv.models.ruleset.validation
+
+import com.badlogic.gdx.files.FileHandle
+import com.unciv.models.ruleset.Ruleset
+import com.unciv.models.ruleset.RulesetCache
+import com.unciv.models.ruleset.unique.UniqueType
+import com.unciv.models.ruleset.validation.ModCompatibility.meetsAllRequirements
+import com.unciv.models.ruleset.validation.ModCompatibility.meetsBaseRequirements
+
+/**
+ *  Helper collection dealing with declarative Mod compatibility
+ *
+ *  Implements:
+ *  - [UniqueType.ModRequires]
+ *  - [UniqueType.ModIncompatibleWith]
+ *  - [UniqueType.ModIsAudioVisual]
+ *  - [UniqueType.ModIsNotAudioVisual]
+ *  - [UniqueType.ModIsAudioVisualOnly]
+ *
+ *  Methods:
+ *  - [meetsBaseRequirements] - to build a checkbox list of Extension mods
+ *  - [meetsAllRequirements] - to see if a mod is allowed in the context of a complete mod selection
+ */
+object ModCompatibility {
+    /**
+     *  Should the "Permanent Audiovisual Mod" checkbox be shown for [mod]?
+     *
+     *  Note: The guessing part may potentially be deprecated and removed if we get our Modders to complete declarative coverage.
+     */
+    fun isAudioVisualMod(mod: Ruleset) = isAudioVisualDeclared(mod) ?: isAudioVisualGuessed(mod)
+
+    private fun isAudioVisualDeclared(mod: Ruleset): Boolean? {
+        if (mod.modOptions.hasUnique(UniqueType.ModIsAudioVisualOnly)) return true
+        if (mod.modOptions.hasUnique(UniqueType.ModIsAudioVisual)) return true
+        if (mod.modOptions.hasUnique(UniqueType.ModIsNotAudioVisual)) return false
+        return null
+    }
+
+    // If there's media (audio folders or any atlas), show the PAV choice...
+    private fun isAudioVisualGuessed(mod: Ruleset): Boolean {
+        val folder = mod.folderLocation ?: return false  // Also catches isBuiltin
+        fun isSubFolderNotEmpty(modFolder: FileHandle, name: String): Boolean {
+            val file = modFolder.child(name)
+            if (!file.exists()) return false
+            if (!file.isDirectory) return false
+            return file.list().isNotEmpty()
+        }
+        if (isSubFolderNotEmpty(folder, "music")) return true
+        if (isSubFolderNotEmpty(folder, "sounds")) return true
+        if (isSubFolderNotEmpty(folder, "voices")) return true
+        return folder.list("atlas").isNotEmpty()
+    }
+
+    fun isExtensionMod(mod: Ruleset) =
+        !mod.modOptions.isBaseRuleset
+            && mod.name.isNotBlank()
+            && !mod.modOptions.hasUnique(UniqueType.ModIsAudioVisualOnly)
+
+    private fun modNameFilter(modName: String, filter: String): Boolean {
+        if (modName == filter) return true
+        if (filter.length < 3 || !filter.startsWith('*') || !filter.endsWith('*')) return false
+        val partialName = filter.substring(1, filter.length - 1).lowercase()
+        return partialName in modName.lowercase()
+    }
+
+    private fun isIncompatibleWith(mod: Ruleset, otherMod: Ruleset) =
+        mod.modOptions.getMatchingUniques(UniqueType.ModIncompatibleWith)
+            .any { modNameFilter(otherMod.name, it.params[0]) }
+
+    private fun isIncompatible(mod: Ruleset, otherMod: Ruleset) =
+        isIncompatibleWith(mod, otherMod) || isIncompatibleWith(otherMod, mod)
+
+    /** Implement [UniqueType.ModRequires] and [UniqueType.ModIncompatibleWith]
+     *  for selecting extension mods to show - after a [baseRuleset] was chosen.
+     *
+     *  - Extension mod is incompatible with [baseRuleset] -> Nope
+     *  - Extension mod has no ModRequires unique -> OK
+     *  - For each ModRequires: Not ([baseRuleset] meets filter OR any other cached _extension_ mod meets filter) -> Nope
+     *  - All ModRequires tested -> OK
+     */
+    fun meetsBaseRequirements(mod: Ruleset, baseRuleset: Ruleset): Boolean {
+        if (isIncompatible(mod, baseRuleset)) return false
+
+        val allOtherExtensionModNames = RulesetCache.values.asSequence()
+            .filter { it != mod && !it.modOptions.isBaseRuleset && it.name.isNotEmpty() }
+            .map { it.name }
+            .toList()
+
+        for (unique in mod.modOptions.getMatchingUniques(UniqueType.ModRequires)) {
+            val filter = unique.params[0]
+            if (modNameFilter(baseRuleset.name, filter)) continue
+            if (allOtherExtensionModNames.none { modNameFilter(it, filter) }) return false
+        }
+        return true
+    }
+
+    /** Implement [UniqueType.ModRequires] and [UniqueType.ModIncompatibleWith]
+     *  for _enabling_ shown extension mods depending on other extension choices
+     *
+     *  @param selectedExtensionMods all "active" mods for the compatibility tests - including the testee [mod] itself in this is allowed, it will be ignored. Will be iterated only once.
+     *
+     *  - No need to test: Extension mod is incompatible with [baseRuleset] - we expect [meetsBaseRequirements] did exclude it from the UI entirely
+     *  - Extension mod is incompatible with any _other_ **selected** extension mod -> Nope
+     *  - Extension mod has no ModRequires unique -> OK
+     *  - For each ModRequires: Not([baseRuleset] meets filter OR any other **selected** extension mod meets filter) -> Nope
+     *  - All ModRequires tested -> OK
+     */
+    fun meetsAllRequirements(mod: Ruleset, baseRuleset: Ruleset, selectedExtensionMods: Iterable<Ruleset>): Boolean {
+        val otherSelectedExtensionMods = selectedExtensionMods.filterNot { it == mod }.toList()
+        if (otherSelectedExtensionMods.any { isIncompatible(mod, it) }) return false
+
+        for (unique in mod.modOptions.getMatchingUniques(UniqueType.ModRequires)) {
+            val filter = unique.params[0]
+            if (modNameFilter(baseRuleset.name, filter)) continue
+            if (otherSelectedExtensionMods.none { modNameFilter(it.name, filter) }) return false
+        }
+        return true
+    }
+}

core/src/com/unciv/models/ruleset/validation/RulesetValidator.kt

@@ -39,6 +39,7 @@ class RulesetValidator(val ruleset: Ruleset) {
         val lines = RulesetErrorList()
 
         // When not checking the entire ruleset, we can only really detect ruleset-invariant errors in uniques
+        addModOptionsErrors(lines)
         uniqueValidator.checkUniques(ruleset.globalUniques, lines, false, tryFixUnknownUniques)
         addUnitErrorsRulesetInvariant(lines, tryFixUnknownUniques)
         addTechErrorsRulesetInvariant(lines, tryFixUnknownUniques)
@@ -57,11 +58,12 @@ class RulesetValidator(val ruleset: Ruleset) {
     }
 
 
-    private fun getBaseRulesetErrorList(tryFixUnknownUniques: Boolean): RulesetErrorList{
+    private fun getBaseRulesetErrorList(tryFixUnknownUniques: Boolean): RulesetErrorList {
 
         uniqueValidator.populateFilteringUniqueHashsets()
 
         val lines = RulesetErrorList()
+        addModOptionsErrors(lines)
         uniqueValidator.checkUniques(ruleset.globalUniques, lines, true, tryFixUnknownUniques)
 
         addUnitErrorsBaseRuleset(lines, tryFixUnknownUniques)
@@ -81,7 +83,7 @@ class RulesetValidator(val ruleset: Ruleset) {
         addPromotionErrors(lines, tryFixUnknownUniques)
         addUnitTypeErrors(lines, tryFixUnknownUniques)
         addVictoryTypeErrors(lines)
-        addDifficutlyErrors(lines)
+        addDifficultyErrors(lines)
         addCityStateTypeErrors(tryFixUnknownUniques, lines)
 
         // Check for mod or Civ_V_GnK to avoid running the same test twice (~200ms for the builtin assets)
@@ -92,6 +94,22 @@ class RulesetValidator(val ruleset: Ruleset) {
         return lines
     }
 
+    private fun addModOptionsErrors(lines: RulesetErrorList) {
+        if (ruleset.name.isBlank()) return // These tests don't make sense for combined rulesets
+
+        val audioVisualUniqueTypes = setOf(
+            UniqueType.ModIsAudioVisual,
+            UniqueType.ModIsAudioVisualOnly,
+            UniqueType.ModIsNotAudioVisual
+        )
+        if (ruleset.modOptions.uniqueObjects.count { it.type in audioVisualUniqueTypes } > 1)
+            lines += "A mod should only specify one of the 'can/should/cannot be used as permanent audiovisual mod' options."
+        if (!ruleset.modOptions.isBaseRuleset) return
+        for (unique in ruleset.modOptions.getMatchingUniques(UniqueType.ModRequires)) {
+            lines += "Mod option '${unique.text}' is invalid for a base ruleset."
+        }
+    }
+
     private fun addCityStateTypeErrors(
         tryFixUnknownUniques: Boolean,
         lines: RulesetErrorList
@@ -109,7 +127,7 @@ class RulesetValidator(val ruleset: Ruleset) {
         }
     }
 
-    private fun addDifficutlyErrors(lines: RulesetErrorList) {
+    private fun addDifficultyErrors(lines: RulesetErrorList) {
         for (difficulty in ruleset.difficulties.values) {
             for (unitName in difficulty.aiCityStateBonusStartingUnits + difficulty.aiMajorCivBonusStartingUnits + difficulty.playerBonusStartingUnits)
                 if (unitName != Constants.eraSpecificUnit && !ruleset.units.containsKey(unitName))
@@ -179,6 +197,7 @@ class RulesetValidator(val ruleset: Ruleset) {
         tryFixUnknownUniques: Boolean
     ) {
         for (reward in ruleset.ruinRewards.values) {
+            @Suppress("KotlinConstantConditions") // data is read from json, so any assumptions may be wrong
             if (reward.weight < 0) lines += "${reward.name} has a negative weight, which is not allowed!"
             for (difficulty in reward.excludedDifficulties)
                 if (!ruleset.difficulties.containsKey(difficulty))
@@ -439,7 +458,7 @@ class RulesetValidator(val ruleset: Ruleset) {
 
             for (requiredTech: String in building.requiredTechs())
                 if (!ruleset.technologies.containsKey(requiredTech))
-                    lines += "${building.name} requires tech ${requiredTech} which does not exist!"
+                    lines += "${building.name} requires tech $requiredTech which does not exist!"
             for (specialistName in building.specialistSlots.keys)
                 if (!ruleset.specialists.containsKey(specialistName))
                     lines += "${building.name} provides specialist $specialistName which does not exist!"
@@ -660,7 +679,7 @@ class RulesetValidator(val ruleset: Ruleset) {
     private fun checkUnitRulesetSpecific(unit: BaseUnit, lines: RulesetErrorList) {
         for (requiredTech: String in unit.requiredTechs())
             if (!ruleset.technologies.containsKey(requiredTech))
-                lines += "${unit.name} requires tech ${requiredTech} which does not exist!"
+                lines += "${unit.name} requires tech $requiredTech which does not exist!"
         for (obsoleteTech: String in unit.techsAtWhichNoLongerAvailable())
             if (!ruleset.technologies.containsKey(obsoleteTech))
                 lines += "${unit.name} obsoletes at tech ${obsoleteTech} which does not exist!"

core/src/com/unciv/ui/screens/modmanager/ModInfoAndActionPane.kt

@@ -1,13 +1,12 @@
 package com.unciv.ui.screens.modmanager
 
 import com.badlogic.gdx.Gdx
-import com.badlogic.gdx.files.FileHandle
 import com.badlogic.gdx.graphics.Texture
 import com.badlogic.gdx.scenes.scene2d.ui.Image
 import com.badlogic.gdx.scenes.scene2d.ui.Table
 import com.unciv.models.metadata.BaseRuleset
 import com.unciv.models.ruleset.Ruleset
-import com.unciv.models.ruleset.unique.UniqueType
+import com.unciv.models.ruleset.validation.ModCompatibility
 import com.unciv.models.translations.tr
 import com.unciv.ui.components.extensions.UncivDateFormat.formatDate
 import com.unciv.ui.components.extensions.UncivDateFormat.parseDate
@@ -52,7 +51,7 @@ internal class ModInfoAndActionPane : Table() {
         val modName = mod.name
         val modOptions = mod.modOptions  // The ModOptions as enriched by us with GitHub metadata when originally downloaded
         isBuiltin = modOptions.modUrl.isEmpty() && BaseRuleset.values().any { it.fullName == modName }
-        enableVisualCheckBox = shouldShowVisualCheckbox(mod)
+        enableVisualCheckBox = ModCompatibility.isAudioVisualMod(mod)
         update(
             modName, modOptions.modUrl, modOptions.defaultBranch,
             modOptions.lastUpdated, modOptions.author, modOptions.modSize
@@ -170,26 +169,4 @@ internal class ModInfoAndActionPane : Table() {
             cell.size(texture.width * resizeRatio, texture.height * resizeRatio)
         }
     }
-
-    private fun shouldShowVisualCheckbox(mod: Ruleset): Boolean {
-        val folder = mod.folderLocation ?: return false  // Also catches isBuiltin
-
-        // Check declared Mod Compatibility
-        if (mod.modOptions.hasUnique(UniqueType.ModIsAudioVisualOnly)) return true
-        if (mod.modOptions.hasUnique(UniqueType.ModIsAudioVisual)) return true
-        if (mod.modOptions.hasUnique(UniqueType.ModIsNotAudioVisual)) return false
-
-        // The following is the "guessing" part: If there's media, show the PAV choice...
-        // Might be deprecated if declarative Mod compatibility succeeds
-        fun isSubFolderNotEmpty(modFolder: FileHandle, name: String): Boolean {
-            val file = modFolder.child(name)
-            if (!file.exists()) return false
-            if (!file.isDirectory) return false
-            return file.list().isNotEmpty()
-        }
-        if (isSubFolderNotEmpty(folder, "music")) return true
-        if (isSubFolderNotEmpty(folder, "sounds")) return true
-        if (isSubFolderNotEmpty(folder, "voices")) return true
-        return folder.list("atlas").isNotEmpty()
-    }
 }

core/src/com/unciv/ui/screens/newgamescreen/ModCheckboxTable.kt

@@ -6,7 +6,7 @@ import com.badlogic.gdx.scenes.scene2d.ui.Table
 import com.badlogic.gdx.scenes.scene2d.utils.ChangeListener
 import com.unciv.models.ruleset.Ruleset
 import com.unciv.models.ruleset.RulesetCache
-import com.unciv.models.ruleset.unique.UniqueType
+import com.unciv.models.ruleset.validation.ModCompatibility
 import com.unciv.ui.components.extensions.pad
 import com.unciv.ui.components.extensions.toCheckBox
 import com.unciv.ui.components.input.onChange
@@ -49,10 +49,8 @@ class ModCheckboxTable(
     private val expanderPadTop = if (isPortrait) 0f else 16f
 
     init {
-        val modRulesets = RulesetCache.values.filterNot {
+        val modRulesets = RulesetCache.values.filter {
-            it.modOptions.isBaseRuleset
+            ModCompatibility.isExtensionMod(it)
-            || it.name.isBlank()
-            || it.modOptions.hasUnique(UniqueType.ModIsAudioVisualOnly)
         }
 
         for (mod in modRulesets.sortedBy { it.name }) {
@@ -77,7 +75,7 @@ class ModCheckboxTable(
         baseRuleset = RulesetCache[newBaseRuleset] ?: return
 
         val compatibleMods = modWidgets
-            .filterNot { isIncompatible(it.mod, baseRuleset) }
+            .filter { ModCompatibility.meetsBaseRequirements(it.mod, baseRuleset) }
 
         if (compatibleMods.none()) return
 
@@ -91,7 +89,8 @@ class ModCheckboxTable(
                 it.add(mod.widget).row()
             }
         }).pad(10f).padTop(expanderPadTop).growX().row()
-        // I think it's not necessary to uncheck the imcompatible (now invisible) checkBoxes
+
+        disableIncompatibleMods()
 
         runComplexModCheck()
     }
@@ -103,6 +102,8 @@ class ModCheckboxTable(
         }
         mods.clear()
         disableChangeEvents = false
+
+        disableIncompatibleMods()
         onUpdate("-")  // should match no mod
     }
 
@@ -114,6 +115,7 @@ class ModCheckboxTable(
         // Check over complete combination of selected mods
         val complexModLinkCheck = RulesetCache.checkCombinedModLinks(mods, baseRulesetName)
         if (!complexModLinkCheck.isWarnUser()){
+            savedModcheckResult = null
             Gdx.input.inputProcessor = currentInputProcessor
             return false
         }
@@ -167,20 +169,41 @@ class ModCheckboxTable(
 
         }
 
+        disableIncompatibleMods()
+
         return true
     }
 
-    private fun modNameFilter(modName: String, filter: String): Boolean {
+    /** Deselect incompatible mods after [skipCheckBox] was selected.
-        if (modName == filter) return true
+     *
-        if (filter.length < 3 || !filter.startsWith('*') || !filter.endsWith('*')) return false
+     *  Note: Inactive - we don'n even allow a conflict to be turned on using [disableIncompatibleMods].
-        val partialName = filter.substring(1, filter.length - 1).lowercase()
+     *  But if we want the alternative UX instead - use this in [checkBoxChanged] near `mods.add` and skip disabling...
-        return partialName in modName.lowercase()
+     */
+    @Suppress("unused")
+    private fun deselectIncompatibleMods(skipCheckBox: CheckBox) {
+        disableChangeEvents = true
+        for (modWidget in modWidgets) {
+            if (modWidget.widget == skipCheckBox) continue
+            if (!ModCompatibility.meetsAllRequirements(modWidget.mod, baseRuleset, getSelectedMods())) {
+                modWidget.widget.isChecked = false
+                mods.remove(modWidget.mod.name)
+            }
+        }
+        disableChangeEvents = true
     }
 
-    private fun isIncompatibleWith(mod: Ruleset, otherMod: Ruleset) =
+    /** Disable incompatible mods - those that could not be turned on with the current selection */
-        mod.modOptions.getMatchingUniques(UniqueType.ModIncompatibleWith)
+    private fun disableIncompatibleMods() {
-            .any { modNameFilter(otherMod.name, it.params[0]) }
+        for (modWidget in modWidgets) {
-    private fun isIncompatible(mod: Ruleset, otherMod: Ruleset) =
+            val enable = ModCompatibility.meetsAllRequirements(modWidget.mod, baseRuleset, getSelectedMods())
-        isIncompatibleWith(mod, otherMod) || isIncompatibleWith(otherMod, mod)
+            assert(enable || !modWidget.widget.isChecked) { "Mod compatibility conflict: Trying to disable ${modWidget.mod.name} while it is selected" }
+            modWidget.widget.isDisabled = !enable  // isEnabled is only for TextButtons
+        }
+    }
 
+    private fun getSelectedMods() =
+        modWidgets.asSequence()
+             .filter { it.widget.isChecked }
+             .map { it.mod }
+             .asIterable()
 }

docs/Modders/uniques.md

@@ -1779,10 +1779,17 @@ Simple unique parameters are explained by mouseover. Complex parameters are expl
 
 ## ModOptions uniques
 ??? example  "Mod is incompatible with [modFilter]"
+	Specifies that your Mod is incompatible with another. Always treated symmetrically, and cannot be overridden by the Mod you are declaring as incompatible.
 	Example: "Mod is incompatible with [DeCiv Redux]"
 
 	Applicable to: ModOptions
 
+??? example  "Mod requires [modFilter]"
+	Specifies that your Extension Mod is only available if any other Mod matching the filter is active.
+	Example: "Mod requires [DeCiv Redux]"
+
+	Applicable to: ModOptions
+
 ??? example  "Should only be used as permanent audiovisual mod"
 	Applicable to: ModOptions