d

py/cfg.py

@@ -0,0 +1,22 @@
+import os
+from cfg_aux import *
+from cld import *
+from ht_Context import *
+
+# Construct section -> key -> value tree from config contents
+#
+# Conditions:
+# 1. Config contents have just become available
+@cld_by_value
+def cfg_parseConfigTree(
+    c: ht_Context
+) -> ht_Context:
+    if (
+        c.recentField == "cfgContents"
+    ):
+        c.cfgTree = cfg_aux_tree(c.cfgContents)
+        c.recentField = "cfgTree"
+        return c
+
+    c.recentField = "none"
+    return c

py/cfg_aux.py

@@ -0,0 +1,47 @@
+from cld import *
+
+# Convert config contents to tree: sections -> keys -> values
+def cfg_aux_tree(
+    cfgContents: [str]
+) -> dict[str, dict[str, str]]:
+    tree: dict[str, dict[str, str]] = {}
+    currentSection = None
+    n = cld_len(cfgContents)
+    for i in range(0, n):
+        line = cfgContents[i]
+        # Section.
+        if (
+            cld_startswith(line, "[")
+        ):
+            currentSection = cfg_aux_treeCreateSection(tree, line)
+        # Key = Value.
+        else:
+            cfg_aux_treeSetKeyValue(tree, currentSection, line)
+    return tree
+
+# Create new section in the tree
+def cfg_aux_treeCreateSection(
+    tree: dict[str, dict[str, str]],
+    line: str
+) -> str:
+    # Strip characters `[` and `]` at both ends.
+    sectionName = line[1:-1]
+    tree[sectionName] = {}
+    return sectionName
+
+# Register key-value pair in the tree
+def cfg_aux_treeSetKeyValue(
+    tree: dict[str, dict[str, str]],
+    sectionName: str,
+    line: str
+):
+    parts = line.split(" = ")
+    # Ignore invalid key-value pairs.
+    if (
+        cld_len(parts) != 2
+    ):
+        return
+
+    key = parts[0]
+    value = parts[1]
+    tree[sectionName][key] = value

py/fs.py

@@ -0,0 +1,40 @@
+import os
+from cld import *
+from fs_aux import *
+from ht_Context import *
+
+# Extract directory from config path
+#
+# Conditions:
+# 1. Config path has just been set
+@cld_by_value
+def fs_locateConfigDir(
+    c: ht_Context
+) -> ht_Context:
+    if (
+        c.recentField == "cfgPath"
+    ):
+        c.cfgDir = os.path.dirname(c.cfgPath)
+        c.recentField = "cfgDir"
+        return c
+
+    c.recentField = "none"
+    return c
+
+# Read config file contents
+#
+# Conditions:
+# 1. Config path has just been set
+@cld_by_value
+def fs_readConfig(
+    c: ht_Context
+) -> ht_Context:
+    if (
+        c.recentField == "cfgPath"
+    ):
+        c.cfgContents = fs_aux_readFile(c.cfgPath)
+        c.recentField = "cfgContents"
+        return c
+
+    c.recentField = "none"
+    return c

py/fs_aux.py

@@ -0,0 +1,10 @@
+
+# Read file into an array of strings
+def fs_aux_readFile(
+    fileName: str
+) -> [str]:
+    lines = []
+    with open(fileName) as file:
+        for line in file:
+            lines.append(line.rstrip())
+    return lines

py/ht_Context.py

@@ -1,5 +1,9 @@
 class ht_Context:
     def __init__(self):
+        self.cfgContents = []
+        self.cfgDir = None
+        self.cfgPath = None
+        self.cfgTree = {}
         self.didLaunch = False
         self.recentField = "none"
         self.windowBackgroundColor = "#000000"