Add substituting tag, remove some old code

Customizations/JSON/FromJSON.ts

@@ -5,6 +5,7 @@ import {Or} from "../../Logic/Tags/Or";
 import {And} from "../../Logic/Tags/And";
 import {Tag} from "../../Logic/Tags/Tag";
 import {TagsFilter} from "../../Logic/Tags/TagsFilter";
+import SubstitutingTag from "../../Logic/Tags/SubstitutingTag";
 
 export class FromJSON {
 
@@ -12,11 +13,12 @@ export class FromJSON {
         const tag = Utils.SplitFirst(json, "=");
         return new Tag(tag[0], tag[1]);
     }
+
     public static Tag(json: AndOrTagConfigJson | string, context: string = ""): TagsFilter {
-        try{
+        try {
             return this.TagUnsafe(json, context);
-        }catch(e){
-            console.error("Could not parse tag", json,"in context",context,"due to ", e)
+        } catch (e) {
+            console.error("Could not parse tag", json, "in context", context, "due to ", e)
             throw e;
         }
     }
@@ -49,6 +51,11 @@ export class FromJSON {
                     new RegExp("^" + split[1] + "$")
                 );
             }
+            if(tag.indexOf(":=") >= 0){
+                const split = Utils.SplitFirst(tag, ":=");
+                return new SubstitutingTag(split[0], split[1]);
+            }
+            
             if (tag.indexOf("!=") >= 0) {
                 const split = Utils.SplitFirst(tag, "!=");
                 if (split[1] === "*") {

Docs/Tags_format.md

@@ -35,3 +35,32 @@ Regex equals
 A tag can also be tested against a regex with `key~regex`. Note that this regex __must match__ the entire value. If the value is allowed to appear anywhere as substring, use `key~.*regex.*`
 
 Equivalently, `key!~regex` can be used if you _don't_ want to match the regex in order to appear.
+
+
+Using other tags as variables
+-----------------------------
+
+**This is an advanced feature - use with caution**
+
+Some tags are automatically set or calculated - see [CalculatedTags](CalculatedTags.md) for an entire overview.
+If one wants to apply such a value as tag, use a substituting-tag such, for example`survey:date:={_date:now}`. Note that the separator between key and value here is `:=`.
+The text between `{` and `}` is interpreted as a key, and the respective value is substituted into the string.
+
+One can also append, e.g. `key:={some_key} fixed text {some_other_key}`.
+
+An assigning tag _cannot_ be used to query OpenStreetMap/Overpass.
+
+If using a key or variable which might not be defined, add a condition in the mapping to hide the option.
+This is because, if `some_other_key` is not defined, one might actually upload the literal text `key={some_other_key}` to OSM - which we do not want.
+
+To mitigate this, use:
+
+```
+"mappings": [
+{
+    "if":"key:={some_other_key}"
+    "then": "...",
+    "hideInAnswer": "some_other_key="
+}
+]
+```

Folder.DotSettings.user

@@ -1,2 +1,5 @@
 <wpf:ResourceDictionary xml:space="preserve" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:s="clr-namespace:System;assembly=mscorlib" xmlns:ss="urn:shemas-jetbrains-com:settings-storage-xaml" xmlns:wpf="http://schemas.microsoft.com/winfx/2006/xaml/presentation">
-	<s:String x:Key="/Default/CodeInspection/Highlighting/SweaWarningsMode/@EntryValue">ShowAndRun</s:String></wpf:ResourceDictionary>
+	<s:String x:Key="/Default/CodeInspection/Highlighting/SweaWarningsMode/@EntryValue">ShowAndRun</s:String>
+	<s:String x:Key="/Default/Environment/UnitTesting/UnitTestSessionStore/Sessions/=d2f95dca_002Defa2_002D40b6_002D8190_002D724496f13a75/@EntryIndexedValue">&lt;SessionState ContinuousTestingMode="0" IsActive="True" Name="Session" xmlns="urn:schemas-jetbrains-com:jetbrains-ut-session"&gt;
+  &lt;Nothing /&gt;
+&lt;/SessionState&gt;</s:String></wpf:ResourceDictionary>

Logic/Tags/And.ts

@@ -46,14 +46,6 @@ export class And extends TagsFilter {
         return allChoices;
     }
 
-    substituteValues(tags: any): TagsFilter {
-        const newChoices = [];
-        for (const c of this.and) {
-            newChoices.push(c.substituteValues(tags));
-        }
-        return new And(newChoices);
-    }
-
     asHumanString(linkToWiki: boolean, shorten: boolean) {
         return this.and.map(t => t.asHumanString(linkToWiki, shorten)).join("&");
     }

Logic/Tags/Or.ts

@@ -30,14 +30,6 @@ export class Or extends TagsFilter {
         return choices;
     }
 
-    substituteValues(tags: any): TagsFilter {
-        const newChoices = [];
-        for (const c of this.or) {
-            newChoices.push(c.substituteValues(tags));
-        }
-        return new Or(newChoices);
-    }
-
     asHumanString(linkToWiki: boolean, shorten: boolean) {
         return this.or.map(t => t.asHumanString(linkToWiki, shorten)).join("|");
     }

Logic/Tags/SubstitutingTag.ts

@@ -0,0 +1,59 @@
+import {TagsFilter} from "./TagsFilter";
+
+/**
+ * The substituting-tag uses the tags of a feature a variables and replaces them.
+ *
+ * e.g. key:={other_key}_{ref} will match an object that has at least 'key'.
+ * If {other_key} is _not_ defined, it will not be substituted.
+ *
+ * The 'key' is always fixed and should not contain substitutions.
+ * This cannot be used to query features
+ */
+export default class SubstitutingTag implements TagsFilter {
+    private readonly _key: string;
+    private readonly _value: string;
+
+    constructor(key: string, value: string) {
+        this._key = key;
+        this._value = value;
+    }
+
+    private static substituteString(template: string, dict: any) {
+        for (const k in dict) {
+            template = template.replace(new RegExp("\\{" + k + "\\}", 'g'), dict[k])
+        }
+        return template;
+    }
+
+    asHumanString(linkToWiki: boolean, shorten: boolean) {
+        return this._key + ":=" + this._value;
+    }
+
+    asOverpass(): string[] {
+        throw "A variable with substitution can not be used to query overpass"
+    }
+
+    isEquivalent(other: TagsFilter): boolean {
+        if (!(other instanceof SubstitutingTag)) {
+            return false;
+        }
+        return other._key === this._key && other._value === this._value;
+    }
+
+    isUsableAsAnswer(): boolean {
+        return true;
+    }
+
+    matchesProperties(properties: any): boolean {
+        const value = properties[this._key];
+        if (value === undefined || value === "") {
+            return false;
+        }
+        const expectedValue = SubstitutingTag.substituteString(this._value, properties);
+        return value === expectedValue;
+    }
+
+    usedKeys(): string[] {
+        return [this._key];
+    }
+}

Logic/Tags/TagsFilter.ts

@@ -2,8 +2,6 @@ export abstract class TagsFilter {
 
     abstract asOverpass(): string[]
 
-    abstract substituteValues(tags: any): TagsFilter;
-
     abstract isUsableAsAnswer(): boolean;
 
     abstract isEquivalent(other: TagsFilter): boolean;
@@ -14,11 +12,4 @@ export abstract class TagsFilter {
 
     abstract usedKeys(): string[];
     
-    public matches(tags: { k: string, v: string }[]) {
-        const properties = {};
-        for (const kv of tags) {
-            properties[kv.k] = kv.v;
-        }
-        return this.matchesProperties(properties);
-    }
 }

test/Tag.spec.ts

@@ -79,6 +79,14 @@ new T("Tags", [
         equal(nameStartsWith.matchesProperties({"name": "Sint-Anna"}), false)
         equal(nameStartsWith.matchesProperties({"name": ""}), false)
         
+        
+        const assign = FromJSON.Tag("survey:date:={_date:now}")
+        equal(assign.matchesProperties({"survey:date":"2021-03-29", "_date:now":"2021-03-29"}), true);
+        equal(assign.matchesProperties({"survey:date":"2021-03-29", "_date:now":"2021-01-01"}), false);
+        equal(assign.matchesProperties({"survey:date":"2021-03-29"}), false);
+        equal(assign.matchesProperties({"_date:now":"2021-03-29"}), false);
+        equal(assign.matchesProperties({"some_key":"2021-03-29"}), false);
+
     })],
     ["Is equivalent test", (() => {