From c0f4d9a505ab1a94e6b0993582c9827f5a681e05 Mon Sep 17 00:00:00 2001
From: Paul Duncan <pabs@pablotron.org>
Date: Sun, 9 Sep 2018 11:02:08 -0400
Subject: js: add to Usage, fix cache test, add support for cache custom
 filters

---
 js/README.mkd        | 41 ++++++++++++++++++++++++++---------------
 js/luigi-template.js |  9 +++++----
 js/test/cache.js     |  7 ++++---
 3 files changed, 35 insertions(+), 22 deletions(-)

(limited to 'js')

diff --git a/js/README.mkd b/js/README.mkd
index 9f3e5e6..63d50e9 100644
--- a/js/README.mkd
+++ b/js/README.mkd
@@ -63,17 +63,8 @@ The built-in templates are:
 
 * `uc`: Upper-case string.
 * `lc`: Lower-case string.
-* `s`: Returns `""` if the value is 1, and `"s"` otherwise. Used to
-  pluralize values.  Example:
-
-    console.log(LuigiTemplate.run('a: a%{a|s}, b: b%{b|s}, c: c%{c|s}'', {
-      a: 0,
-      b: 1,
-      c: 2,
-    }));
-
-    // prints "a: as, b: b, c: cs"
-
+* `s`: Pluralize a value by returning `""` if the value is 1, and
+  `"s"` otherwise.
 * `length`: Get the length of an array.
 * `trim`: Trim leading and trailing whitespace from a string.
 * `h`: HTML-escape a string value.
@@ -100,8 +91,8 @@ of global filters (`LuigiTemplate.FILTERS`), like so:
 
     // prints "hello bar-&lt;Paul&gt;-bar"
 
-You can also create a custom filters and limit it to a particular
-template by passing a hash as the second parameter to the
+You can also create a custom filter and limit it to a particular
+template by passing a custom filter hash as the second parameter to the
 `LuigiTemplate` constructor, like this:
 
     // create template with custom template-specific filter
@@ -118,8 +109,7 @@ template by passing a hash as the second parameter to the
 
     // prints "hello bar-&lt;Paul&gt;-bar"
 
-You can pass arguments to your custom filters as well.  Here's an
-example:
+You can pass arguments to your custom filters.  Here's an example:
 
     // create template with custom template-specific filter named
     // "wrap", which wraps the value in the given filter parameters
@@ -167,6 +157,27 @@ Here's how you create a template cache:
 
     // prints "hello &lt;PAUL%gt;"
 
+Finally, template caches use their own set of custom filters by passing
+the custom custom when creating a template cache:
+
+    // create template cache with a custom filter named "reverse"
+    var cache = LuigiTemplate.cache({
+      hello: 'hello %{name | uc | reverse | h}'
+    }, {
+      reverse: function(s) {
+        var cs = (s || '').split('');
+        cs.reverse();
+        return cs.join('');
+      },
+    });
+
+    // run template, print result to console
+    console.log(cache.run('hello', {
+      name: '<Paul>',
+    }));
+
+    // prints "hello %gt;LUAP&lt;"
+
 Documentation
 -------------
 *TODO*
diff --git a/js/luigi-template.js b/js/luigi-template.js
index 473938f..f01d976 100644
--- a/js/luigi-template.js
+++ b/js/luigi-template.js
@@ -288,8 +288,9 @@ LuigiTemplate = (function() {
   T.prototype.run = run;
 
   // declare cache constructor
-  T.Cache = function(templates, try_dom) {
+  T.Cache = function(templates, filters, try_dom) {
     this.templates = templates;
+    this.filters = filters || FILTERS;
     this.try_dom = !!try_dom;
     this.cache = {};
   };
@@ -310,15 +311,15 @@ LuigiTemplate = (function() {
       }
 
       // cache template
-      this.cache[key] = new T(s);
+      this.cache[key] = new T(s, this.filters);
     }
 
     // run template
     return this.cache[key].run(args);
   };
 
-  T.cache = function(args) {
-    return new T.Cache(args);
+  T.cache = function(args, filters) {
+    return new T.Cache(args, filters || FILTERS);
   }
 
   // declare domcache constructor
diff --git a/js/test/cache.js b/js/test/cache.js
index 0b68b3d..22490c1 100644
--- a/js/test/cache.js
+++ b/js/test/cache.js
@@ -40,14 +40,15 @@
 
 
   it('cache with custom filters', function() {
-    var cache = new LuigiTemplate.Cache({
-      foo: ['foo%{bar | barify}'],
+    var cache = LuigiTemplate.cache({
+      foo: ['foo%{bar | cache-barify}'],
     }, {
-      barify: function(s) {
+      'cache-barify': function(s) {
         return 'bar-' + s + '-bar';
       },
     });
 
+    // run template from cache, get result
     var r = cache.run('foo', {
       bar: 'foo',
     });
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