From 384fc3ace81cbc3de113552dc069835bad6110b6 Mon Sep 17 00:00:00 2001
From: Dean Jackson <deanishe@deanishe.net>
Date: Thu, 2 Nov 2017 22:49:07 +0100
Subject: [PATCH] Add support for Pint's contexts #18

---
 CHANGELOG.md                                  |  18 +++++++++
 ...fredworkflow => Convert-3.2.alfredworkflow | Bin 276266 -> 276426 bytes
 README.md                                     |  13 ++++--
 src/convert.py                                |  38 ++++++++++++++----
 src/info.plist                                |   2 +-
 5 files changed, 60 insertions(+), 11 deletions(-)
 rename Convert-3.1.alfredworkflow => Convert-3.2.alfredworkflow (94%)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9894e7e..757cf6f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,20 @@
 Changelog
 =========
 
+### [3.2][v3.2] ###
+
+Released 2017-11-02.
+
+- Add support for Pint's contexts #18
+
+
+### [3.1][v3.1] ###
+
+Released 2017-11-02.
+
+- Replace Yahoo! Finance with [openexchangerates.org][openx] #27
+
+
 ### [3.0][v3.0] ###
 
 Released 2017-07-16.
@@ -14,6 +28,7 @@ Released 2017-07-16.
 - Update Alfred-Workflow
 - Update Pint
 
+
 ### [2.6][v2.6] ###
 
 Released 2017-06-15.
@@ -103,3 +118,6 @@ Released 2014-08-09.
 [v2.5]: https://github.com/deanishe/alfred-convert/releases/tag/v2.5
 [v2.6]: https://github.com/deanishe/alfred-convert/releases/tag/v2.6
 [v3.0]: https://github.com/deanishe/alfred-convert/releases/tag/v3.0
+[v3.1]: https://github.com/deanishe/alfred-convert/releases/tag/v3.1
+[v3.2]: https://github.com/deanishe/alfred-convert/releases/tag/v3.2
+[openx]: https://openexchangerates.org/
\ No newline at end of file
diff --git a/Convert-3.1.alfredworkflow b/Convert-3.2.alfredworkflow
similarity index 94%
rename from Convert-3.1.alfredworkflow
rename to Convert-3.2.alfredworkflow
index d3e2fca62d028862cab2dbd4dc3f48ab7429957a..5a846aba8706608981695f27ff35275e3ab5d469 100644
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diff --git a/README.md b/README.md
index 3bb5ef4..a8ba88f 100644
--- a/README.md
+++ b/README.md
@@ -54,16 +54,16 @@ Usage
 <a name="conversions"></a>
 ### Conversions ###
 
-**NOTE**: To perform conversions between fiat currencies, you must set a key for the [openexchangerates.org][openx] API in the workflow's [configuration sheet](#configuration). You can sign up for a free account [here][openx-free].
+**NOTE**: To perform conversions between fiat currencies, you must set a key for the [openexchangerates.org][openx] API in the workflow's [configuration sheet](#configuration). You can sign up for a free account [here][openx-free]. When you're signed up, copy the **App ID** from the email you receive or [this page][openx-appid] into the `APP_KEY` field in the [configuration sheet](#configuration).
 
-- `conv <quantity> <from unit> [<to unit>]` — Perform a conversion
+- `conv [<context>] <quantity> <from unit> [<to unit>]` — Perform a conversion
     - `↩` or `⌘C` — Copy the result to the pasteboard
     - `⌘↩` — Add/remove destination unit as default for this dimensionality
     - `⌘L` — Show result in Alfred's Large Type window
 
 If no destination unit is specified, any defaults you've saved will be used (that aren't the same as the source unit).
 
-The syntax is simple: the quantity, the unit you want to convert from then (optionally) the unit you want to convert to. For example:
+The syntax is simple: an optional context, the quantity, the unit you want to convert from then (optionally) the unit you want to convert to. For example:
 
 - `conv 128 mph kph`
 - `conv 72in cm`
@@ -71,6 +71,10 @@ The syntax is simple: the quantity, the unit you want to convert from then (opti
 - `conv 20.5 m/s mph`
 - `conv 100 eur gbp`
 
+Or with a context:
+
+- `conv spectroscopy 1Å eV` (or `conv sp 1Å eV`)
+
 It doesn't matter if there is a space between the quantity and the units or not. Alfred-Convert will tell you if it doesn't understand your query or know the units.
 
 Actioning an item (selecting it and hitting `↩`) will copy it to the clipboard. Using `⌘+L` will display the result in Alfred's large text window, `⌘+C` will copy the selected result to the clipboard.
@@ -151,6 +155,7 @@ See [CHANGELOG][changelog] for more information.
 
 |   Release   |      Date      |
 |-------------|----------------|
+| [3.1][v3.2] | 2017-11-02     |
 | [3.1][v3.1] | 2017-11-02     |
 | [3.0][v3.0] | 2017-07-16     |
 | [2.6][v2.6] | 2017-06-15     |
@@ -200,6 +205,8 @@ All other code/media are released under the [MIT Licence][mit].
 [v2.6]: https://github.com/deanishe/alfred-convert/releases/tag/v2.6
 [v3.0]: https://github.com/deanishe/alfred-convert/releases/tag/v3.0
 [v3.1]: https://github.com/deanishe/alfred-convert/releases/tag/v3.1
+[v3.2]: https://github.com/deanishe/alfred-convert/releases/tag/v3.2
 [cryptocompare]: https://www.cryptocompare.com/
 [openx]: https://openexchangerates.org/
 [openx-free]: https://openexchangerates.org/signup/free
+[openx-appid]: https://openexchangerates.org/account/app-ids
diff --git a/src/convert.py b/src/convert.py
index 49b4256..9047a5e 100755
--- a/src/convert.py
+++ b/src/convert.py
@@ -60,8 +60,8 @@ def __init__(self, number, dimensionality, from_unit, to_unit=None):
     def __repr__(self):
         return ('Input(number={!r}, dimensionality={!r}, '
                 'from_unit={!r}, to_unit={!r})').format(
-                    self.number,
-                    self.dimensionality, self.from_unit, self.to_unit)
+                    self.number, self.dimensionality, self.from_unit,
+                    self.to_unit)
 
     def __str__(self):
         return self.__repr__()
@@ -160,7 +160,7 @@ def convert(self, i):
         for u in units:
             to_unit = ureg.Quantity(1, u)
             conv = qty.to(to_unit)
-            log.debug('%s -> %s = %s', i.from_unit, u, conv)
+            log.debug('[convert] %s -> %s = %s', i.from_unit, u, conv)
             results.append(Conversion(i.number, i.from_unit,
                                       conv.magnitude, u, i.dimensionality))
 
@@ -168,14 +168,32 @@ def convert(self, i):
 
     def parse(self, query):
         """Parse user query into `Input`."""
-        # Parse number from start of query
+        ctx = []
         qty = []
+
+        # Parse optional context
+        for c in query:
+            if c in 'abcdefghijklmnopqrstuvwxyz':
+                ctx.append(c)
+            else:
+                break
+
+        if ctx:
+            ctx = ''.join(ctx)
+            ureg.enable_contexts(ctx)
+            log.debug('[parser] context=%s', ctx)
+            query = query[len(ctx):].strip()
+
+        # Parse from quantity
         for c in query:
             if c in '1234567890.,':
                 qty.append(c)
             else:
                 break
         if not len(qty):
+            if ctx:
+                raise ValueError('No quantity')
+
             raise ValueError('Start your query with a number')
 
         tail = query[len(qty):].strip()
@@ -184,14 +202,16 @@ def parse(self, query):
         if not len(tail):
             raise ValueError('No units specified')
 
-        log.debug('quantity : %s tail : %s', qty, tail)
+        log.debug('[parser] quantity=%s, tail=%s', qty, tail)
 
         # Try to parse rest of query into a pair of units
         from_unit = to_unit = None
         units = [s.strip() for s in tail.split()]
         from_unit = units[0]
+        log.debug('[parser] from_unit=%s', from_unit)
         if len(units) > 1:
             to_unit = units[1]
+            log.debug('[parser] to_unit=%s', to_unit)
         if len(units) > 2:
             raise ValueError('More than 2 units specified')
 
@@ -212,7 +232,7 @@ def parse(self, query):
         i = Input(from_unit.magnitude, unicode(from_unit.dimensionality),
                   unicode(from_unit.units), tu)
 
-        log.debug(i)
+        log.debug('[parser] %s', i)
 
         return i
 
@@ -298,7 +318,7 @@ def convert(query):
     else:
         try:
             results = c.convert(i)
-            log.debug('results=%r', results)
+            # log.debug('results=%r', results)
         except NoToUnits:
             log.critical(u'No to_units (or defaults) for %s', i.dimensionality)
             error = u'No destination units (or defaults) for {}'.format(
@@ -309,6 +329,10 @@ def convert(query):
             error = u"Can't convert from {} {} to {} {}".format(
                 err.units1, err.dim1, err.units2, err.dim2)
 
+        except KeyError as err:
+            log.critical(u'invalid context (%s): %s', i.context, err)
+            error = u'Unknown context: {}'.format(i.context)
+
     if not error and not results:
         error = 'Conversion input not understood'
 
diff --git a/src/info.plist b/src/info.plist
index bbdeef5..87a184a 100644
--- a/src/info.plist
+++ b/src/info.plist
@@ -637,7 +637,7 @@ UPDATE_INTERVAL is the number of minutes between exchange rate updates.</string>
 		<string>APP_KEY</string>
 	</array>
 	<key>version</key>
-	<string>3.1</string>
+	<string>3.2</string>
 	<key>webaddress</key>
 	<string></string>
 </dict>