- construction can have building-requirements

src/common/gamecode/economy.c

@@ -1221,6 +1221,10 @@ recruit_archetype(unit * u, order * ord)
         /* no skill, or not enough skill points to build */
         cmistake(u, ord, 50, MSG_PRODUCE);
         break;
+      case EBUILDINGREQ:
+        ADDMSG(&u->faction->msgs,
+          msg_feedback(u, u->thisorder, "building_needed", "building", arch->ctype->btype->_name));
+        break;
       default:
         assert(!"unhandled return value from build() in recruit_archetype");
     }
@@ -1338,6 +1342,10 @@ manufacture(unit * u, const item_type * itype, int want)
       ADDMSG(&u->faction->msgs,
         msg_feedback(u, u->thisorder, "skill_needed", "skill", sk));
       return;
+    case EBUILDINGREQ:
+      ADDMSG(&u->faction->msgs,
+        msg_feedback(u, u->thisorder, "building_needed", "building", itype->construction->btype->_name));
+      return;
     case ELOWSKILL:
       ADDMSG(&u->faction->msgs,
         msg_feedback(u, u->thisorder, "manufacture_skills", "skill minskill product",
@@ -1736,6 +1744,10 @@ create_potion(unit * u, const potion_type * ptype, int want)
       /* no skill, or not enough skill points to build */
       cmistake(u, u->thisorder, 50, MSG_PRODUCE);
       break;
+    case EBUILDINGREQ:
+      ADDMSG(&u->faction->msgs,
+        msg_feedback(u, u->thisorder, "building_needed", "building", ptype->itype->construction->btype->_name));
+      break;
     case ECOMPLETE:
       assert(0);
       break;

src/common/kernel/build.c

@@ -608,6 +608,14 @@ build(unit * u, const construction * ctype, int completed, int want)
   if (type==NULL) return 0;
   if (type->improvement==NULL && completed==type->maxsize)
     return ECOMPLETE;
+  if (type->btype!=NULL) {
+    building * b;
+    if (!u->building || u->building->type!=type->btype) {
+      return EBUILDINGREQ;
+    }
+    b = inside_building(u);
+    if (b==NULL) return EBUILDINGREQ;
+  }
 
   if (type->skill!=NOSKILL) {
     int effsk;

src/common/kernel/build.h

@@ -47,6 +47,8 @@ typedef struct construction {
   int maxsize;   /* maximum size of this type */
   int reqsize;   /* size of object using up 1 set of requirement. */
   requirement * materials; /* material req'd to build one object */
+  const struct building_type * btype;
+  /* building type required to make this thing */
 
   struct construction * improvement;
   /* next level, if upgradable. if more than one of these items
@@ -58,6 +60,7 @@ typedef struct construction {
   */
   struct attrib * attribs;
   /* stores skill modifiers and other attributes */
+
 } construction;
 
 extern int destroy_cmd(struct unit * u, struct order * ord);
@@ -88,6 +91,7 @@ extern struct message * msg_materials_required(struct unit * u, struct order * o
 #define ENEEDSKILL -2
 #define ECOMPLETE -3
 #define ENOMATERIALS -4
+#define EBUILDINGREQ -5
 
 #ifdef __cplusplus
 }

src/common/kernel/xmlreader.c

@@ -53,6 +53,20 @@ without prior permission by the authors of Eressea.
 
 static boolean gamecode_enabled = false;
 
+static building_type * bt_get_or_create(const char * name)
+{
+  if (name!=NULL) {
+    building_type * btype = bt_find(name);
+    if (btype==NULL) {
+      btype = calloc(sizeof(building_type), 1);
+      btype->_name = strdup(name);
+      bt_register(btype);
+    }
+    return btype;
+  }
+  return NULL;
+}
+
 void
 enable_xml_gamecode(void)
 {
@@ -181,6 +195,12 @@ xml_readconstruction(xmlXPathContextPtr xpath, xmlNodeSetPtr nodeSet, constructi
     con->minskill = xml_ivalue(node, "minskill", -1);
     con->reqsize = xml_ivalue(node, "reqsize", -1);
     
+    propValue = xmlGetProp(node, BAD_CAST "building");
+    if (propValue!=NULL) {
+      con->btype = bt_get_or_create((const char*)propValue);
+      xmlFree(propValue);
+    }
+
     /* read construction/requirement */
     xpath->node = node;
     req = xmlXPathEvalExpression(BAD_CAST "requirement", xpath);
@@ -244,12 +264,7 @@ parse_buildings(xmlDocPtr doc)
 
       propValue = xmlGetProp(node, BAD_CAST "name");
       assert(propValue!=NULL);
-      btype = bt_find((const char*)propValue);
+      btype = bt_get_or_create((const char*)propValue);
-      if (btype==NULL) {
-        btype = calloc(sizeof(building_type), 1);
-        btype->_name = strdup((const char *)propValue);
-        bt_register(btype);
-      }
       xmlFree(propValue);
 
       btype->capacity = xml_ivalue(node, "capacity", -1);
@@ -1026,12 +1041,7 @@ parse_resources(xmlDocPtr doc)
 
           propValue = xmlGetProp(node, BAD_CAST "building");
           if (propValue!=NULL) {
-            btype = bt_find((const char*)propValue);
+            btype = bt_get_or_create((const char*)propValue);
-            if (btype==NULL) {
-              btype = calloc(sizeof(building_type), 1);
-              btype->_name = strdup((const char *)propValue);
-              bt_register(btype);
-            }
             xmlFree(propValue);
           }
           rdata->modifiers[k].btype = btype;
@@ -1050,12 +1060,7 @@ parse_resources(xmlDocPtr doc)
           } else if (strcmp((const char *)propValue, "require")==0) {
             xmlChar * propBldg = xmlGetProp(node, BAD_CAST "building");
             if (propBldg!=NULL) {
-              btype = bt_find((const char*)propBldg);
+              btype = bt_get_or_create((const char*)propBldg);
-              if (btype==NULL) {
-                btype = calloc(sizeof(building_type), 1);
-                btype->_name = strdup((const char *)propBldg);
-                bt_register(btype);
-              }
               rdata->modifiers[k].btype = btype;
               rdata->modifiers[k].flags = RMF_REQUIREDBUILDING;
               xmlFree(propBldg);

src/res/e2k9/items.xml

@@ -0,0 +1,14 @@
+<?xml version="1.0"?>
+<resources>
+
+  <resource name="charger">
+    <item big="yes" weight="5000" score="10" capacity="7000" animal="yes">
+      <construction skill="training" minskill="4" reqsize="1">
+        <requirement type="money" quantity="200"/>
+        <requirement type="iron" quantity="1"/>
+      </construction>
+      <function name="give" value="givehorses"/>
+    </item>
+  </resource>
+
+  </resources>

src/res/e2k9/races.xml

@@ -38,6 +38,7 @@
     <skill name="magic" modifier="-1"/>
     <skill name="mining" modifier="1"/>
     <skill name="quarrying" modifier="1"/>
+    <skill name="riding" modifier="-99"/>
     <skill name="sailing" modifier="-1"/>
     <skill name="shipcraft" modifier="-1"/>
     <skill name="tactics" modifier="1"/>

src/res/messages.xml

@@ -6968,6 +6968,16 @@
     <text locale="fr">"'$order($command)' - $race($race,0) are peace-loving and will not attack anyone."</text>
     <text locale="en">"'$order($command)' - $race($race,0) are peace-loving and will not attack anyone."</text>
   </message>
+  <message name="building_needed" section="production">
+    <type>
+      <arg name="unit" type="unit"/>
+      <arg name="region" type="region"/>
+      <arg name="command" type="order"/>
+      <arg name="building" type="name"/>
+    </type>
+    <text locale="de">"$unit($unit) in $region($region): '$order($command)' - Die Einheit steht nicht im benötigten Gebäude, $localize($building)."</text>
+    <text locale="en">"$unit($unit) in $region($region): '$order($command)' - The unit must be in a  $localize($building) to produce this."</text>
+  </message>
   <message name="skill_needed" section="production">
     <type>
       <arg name="unit" type="unit"/>