web: Add autocompletion for deposits

The list of valid autocompletions is deployment specific and may be
configured in 99-meta/config.py.

Fixes #67

95-htdocs/templates/internal-lending.mako

@@ -7,6 +7,7 @@
 ##  messages: list of named tuples of (cls, title, body)
 <%!
   import urllib.parse
+  import klausurarchiv.config
 %>
 <%inherit file="base-internal.mako" />
 
@@ -94,7 +95,10 @@
         <label class="control-label" for="deposit">Pfand:</label>
         <input type="text" name="deposit" 
           value="${args["deposit"] if "deposit" in args else ""}"
-          class="form-control" />
+          class="form-control" list="deposits" />
+        <datalist id="deposits">
+          ${"\n".join(["<option value=\"%s\" />"%(d) for d in klausurarchiv.config.deposits])}
+        </datalist>
         <input type="submit" name="commit" 
           value="(W)eiter: Ausleihen" 
           class="btn btn-primary"

99-meta/config.py.example

 from klausurarchiv.config_base import *
 
+## \brief See klausurarchiv/config.py#deposits
+deposits=["Studierendenausweis", "Semesterticket", "Führerschein", "10 €"]
 
 ## \brief See klausurarchiv/config.py#printPDFFile
 def printPDFFile(filename,count):
@@ -18,3 +20,4 @@ def resolveStudentID(id):
   # todo: implement this method, performing whatever magic needs to be 
   # performed in order to obtain a student's name from its ID (e.g. an LDAP 
   # search)
+  pass

src/python/klausurarchiv/config.py

@@ -9,8 +9,9 @@
 # 
 # By including this module, the deployment-specific code is loaded automatically
 # and all of its symbols are included in this module's namespace.   
-# Additionally, for each configurable method a default is implemented here.
-# These methods are:
+# Additionally, for each configurable method or variable a default is
+# implemented here. These methods and variables are:
+#   - klausurarchiv.config.deposits
 #   - klausurarchiv.config.printPDFFile
 #   - klausurarchiv.config.scanToPDF
 #   - klausurarchiv.config.resolveStudentID
@@ -28,6 +29,13 @@ fn_config=os.path.join(
 # define each default here and load configuration afterwards. This ensures that
 # defaults are properly overwritten.
 
+## \brief List of some valid deposits
+# 
+# This list is used for autocompletion of the deposit in the web interface. The
+# user can still enter other deposits, but this should be the regular / most
+# common ones.
+deposits=[]
+
 ## \brief Deployment-specific method issuing a printjob of a single exam file.
 # 
 # This method is to be overwritten by the deployment-specific configuration
@@ -78,4 +86,7 @@ if os.path.exists(fn_config):
 
     setattr(ThisModule,k,getattr(m,k))
   
+  # special handling for non-method variable
+  if "deposits" in dir(m):
+    setattr(ThisModule,"deposits",getattr(m,"deposits"))